CN109589684A - A kind of fresh air system electret nanofiber filtration material and preparation method thereof - Google Patents
A kind of fresh air system electret nanofiber filtration material and preparation method thereof Download PDFInfo
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- CN109589684A CN109589684A CN201811317050.7A CN201811317050A CN109589684A CN 109589684 A CN109589684 A CN 109589684A CN 201811317050 A CN201811317050 A CN 201811317050A CN 109589684 A CN109589684 A CN 109589684A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/02—Loose filtering material, e.g. loose fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/02—Loose filtering material, e.g. loose fibres
- B01D39/04—Organic material, e.g. cellulose, cotton
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
- D01F6/06—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins from polypropylene
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/16—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated carboxylic acids or unsaturated organic esters, e.g. polyacrylic esters, polyvinyl acetate
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0435—Electret
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0604—Arrangement of the fibres in the filtering material
- B01D2239/0622—Melt-blown
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0604—Arrangement of the fibres in the filtering material
- B01D2239/0631—Electro-spun
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Filtering Materials (AREA)
Abstract
The present invention relates to a kind of fresh air system electret nanofiber filtration materials and preparation method thereof, preparation method: electrostatic spinning is carried out to the liquid mixture dissolved with polymer and obtains fresh air system electret nanofiber filtration material, is quickly heating and curing during electrostatic spinning to the liquid mixture dissolved with polymer of die orifice exit；Quickly being heating and curing is that the liquid mixture dissolved with polymer is instigated to be warming up to T in 0.1~0.9ms at 3~5cm of die orifice exit, T >=dissolved with the boiling point of solvent in the liquid mixture of polymer.The Surface electrostatic potential of final obtained product is 1700~2300V, and 150 ° of hydrophobic angle >, pressure drag is less than 20Pa, and it is undamped to save a month charge.Preparation method of the present invention is simple, at low cost, small to equipment requirement, and prepared fresh air system is good with electret nanofiber filtration material electret effect, and strainability is excellent, great application prospect.
Description
Technical field
The invention belongs to fiber electret Material Field, be related to a kind of fresh air system electret nanofiber filtration material and its
Preparation method.
Background technique
High-performance static electro spinning nano fiber filtering material need to have the characteristics that high efficiency, lower resistance, but conventional filter material
Material realizes effective filtering to particle by the design feature (aperture size, bulk density etc.) of material itself, usually has
It is efficient while also there is very high pressure drag, cause strainability poor, thus be only difficult by the design feature of fiber itself
Realize the active balance and high efficiency of filter efficiency and pressure drag, the target of lower resistance.Electrostatic adsorption (electret material)
The interception function that electrostatic adsorption force can be increased substantially on the basis of original filter structure efficiency to particle is introduced to mention
Filtration efficiency, while guaranteeing the characteristics of low pressure hinders again.
The research, exploitation and production of fiber electret material mainly use the technology of high-voltage corona discharge at present, although the skill
Art can preferably prepare electret fiber filtering, but it is simultaneously there is also shortcomings, such as electret performance are unstable, generated
Charge based on the space charge in fiber sheath and it is vulnerable, the device is complicated, at high cost etc., therefore for developing low-cost and
The fiber filter material that permanent electret is capable of in dynamical electret technology and preparation becomes research emphasis.
Static Spinning is a kind of nanofiber technology of preparing while and a kind of nanofiber that spinning is carried out using high-voltage electricity
Electret technology, compared to corona discharge electret technology advantage be spinning during a large amount of space charges can be injected
In fiber, and space charge is easily captured by the deep trap of fibrous inside, while be can induce dipole polarization and being generated polarization charge,
Electret effect is long-acting persistently, thus can one-step shaping prepare electret filtering material, and there is excellent electret effect.It is open at present
Prepare a kind of the having of electrostatic spinning nano fiber electret material " electrostatic spinning nano fiber electret filtering material and preparation method thereof (ZL
201410452788.X) ", " a kind of Static Spinning for purifying PM2.5/electret composite fibre filtering material and its preparation side
Method (CN201610998771.3) ", " a kind of Static Spinning of high abrasion/electret composite cellulosic membrane filtering material and its preparation side
Method (CN201610846156.0) " but above-mentioned preparation method have that jet stream curing time is long during electrostatic spinning and solvent is big
Residual solvent, which slowly volatilizees, after the problems such as amount residual causes fiber solidifying preceding a large amount of charge dissipations, charge to solidify causes dipole polarization electricity
Lotus depolarization, space charge further dissipate, and eventually lead to that tunica fibrosa electret effect is poor, stability is poor.
All indoors, occupancy is numerous for modern's Working Life, is badly in need of ventilation to improve indoor air quality.Fresh air system
A set of independent air processing system that system is made of supply air system and exhaust system, fresh air ventilator pass through indoor live gas
It filters, purify, be pipelined to interior.Fresh air system is huge on indoor air quality control influence, at present fresh air system
The filtering material used of uniting is mostly melt-blown filter materials, and electret is vulnerable under high humidity environment and service life is short for the material, this
Seriously fresh air system is limited to the improvement of air quality.
Therefore, the fresh air system that a kind of stability is good, at low cost, equipment requirement is small and has excellent performance is studied to be received with electret
Rice fiber filter material and preparation method thereof becomes at present the urgently technical issues that need to address.
Summary of the invention
The purpose of the present invention is overcoming problems of the prior art, a kind of fresh air system electret nanofiber is provided
Filtering material and preparation method thereof.The method being quickly heating and curing is used to make the liquid dissolved with polymer during electrostatic spinning
Mixture is converted into non-streaming dynamic from flowable state, with quick " freezing " strand, prevents the generation of depolarization phenomenon, subsequent to poly-
It closes object and carries out instantaneous temperature reduction processing, so that the kinetic energy for the space charge that polymer has trapped reduces, reduce electron escape ability,
The storage of the charge in space can be strengthened moment, strengthen electret effect, in addition, the present invention is in the liquid mixture dissolved with polymer
It also added inorganic nanoparticles, have very big humidification to electret effect, and inorganic electret and organic polymer are mixed
Interfacial polarization can be generated in the presence of external electric field by closing the interface generated, generated polarization charge, further enhanced electret effect.
In order to achieve the above object, the present invention adopts the following technical scheme that:
A kind of preparation method of fresh air system electret nanofiber filtration material, to the liquid mixture dissolved with polymer
It carries out electrostatic spinning and obtains fresh air system electret nanofiber filtration material, to die orifice exit during electrostatic spinning
The liquid mixture dissolved with polymer be quickly heating and curing；Described be quickly heating and curing is the liquid instigated dissolved with polymer
Body mixture is warming up to T at 3~5cm of die orifice exit in 0.1~0.9ms, and T >=dissolved with the liquid mixture of polymer
Solvent boiling point.Heating temperature is too low, not can guarantee the solvent in the liquid mixture dissolved with polymer and quickly volatilizees；Heating rate
It crosses slow, it is difficult to meet that the quick-setting i.e. solvent evaporation rate of requirement is excessively slow, and remaining solvent is excessive in jet stream；Heating rate mistake
Fastly, it will lead to fibre diameter slightly to become fragile with fiber excessively.
During electrostatic spinning, dissolved with polymer liquid mixture under the action of electrostatic field, a large amount of polarization can be generated
Charge, polarization charge at this time are easy due to being influenced by molecular chain movement, environment temperature and humidity etc., so that pole
The molecule of change will appear depolarization phenomenon, cause electret effect poor, and rapid curing can make in a very short period of time dissolved with poly-
The liquid mixture for closing object is converted into non-streaming dynamic from flowable state, with quick " freezing " strand, prevents the hair of depolarization phenomenon
It is raw, strengthen electret effect.Protection scope of the present invention is not limited to that, is heated to the liquid mixture dissolved with polymer
Solidification, heating temperature, which is greater than solvent boiling point, may make in the liquid mixture jet stream dissolved with polymer 95% or more solvent fast
Speed volatilization is to realize rapid curing, and quickly volatilization refers to solvent composition in jet stream in very short time (0.1~0.9ms) from penetrating
Stream is internal to be diffused into outside jet stream.
As a preferred technical scheme:
A kind of preparation method of fresh air system electret nanofiber filtration material as described above, the electrostatic spinning
Technological parameter are as follows: dissolved with 30~120 DEG C of temperature of the liquid mixture of polymer, 5~70KV of voltage, 3~40cm of distance is received,
0.1~10mL/h of rate of flooding, 15~35 DEG C of environment temperature, humidity 5~90%；In the liquid mixture dissolved with polymer
The mass concentration of polymer is 3~40%.Controlling spinning temperature (dissolved with the liquid mixture temperature of polymer) is to pass through electrostatic
What the temperature control device in the spinneret module of spinning was realized, temperature control device and online agitating device are equipped in spinneret module, by adding
The i.e. control spinning temperature of heat makes the polymer molecular chain " defrosting " freezed in the liquid mixture dissolved with polymer, this is conducive to
Under the action of subsequent additional electric field, dipole molecule preferably polarizes, and generates more polarization charges, contains in spinneret module online
Agitating device is dispersed in inorganic nanoparticles in polymer, prevents from reuniting.
A kind of preparation method of fresh air system electret nanofiber filtration material as described above, made from electrostatic spinning
Fiber carries out instantaneous temperature reduction processing after being received with reception substrate, the space charge that instantaneous temperature reduction has trapped polymer moves
It can reduce, reduce electron escape ability, the storage of the charge in space can be strengthened moment, strengthen electret effect, the instantaneous temperature reduction
Refer to institute's spinning nano fibre and receive substrate at a distance from be less than 1mm when, nanofiber contacted with liquid nitrogen after less than 5s time
Inside it is reduced to 0 DEG C or less；The instantaneous temperature reduction is equipped at 1~100mm of substrate by receiving in the back side distance for receiving substrate
What one liquid nitrogen constant release device was realized, the rate of release of the liquid nitrogen constant release device is 1~100L/min, nitrogen with
Certain speed can generate a reaction force to nanofiber in-flight by substrate, hinder fiber and interfibrous close
Arrangement, is conducive to molding nanofiber and forms fluffy structure, to be formed between fiber without adhesion, fluffy three-dimensional netted intercommunication
Structure.Liquid nitrogen rate of release is too fast, and the reaction force that nanofiber receives is excessive, it is caused to be difficult to be attached on reception substrate；
Liquid nitrogen rate of release is excessively slow, and active force is too small, can not be formed between fiber without adhesion, fluffy three-dimensional netted interworking architecture.
A kind of preparation method of fresh air system electret nanofiber filtration material as described above, it is described dissolved with polymer
Liquid mixture in polymer include homopolymer, block copolymer, random copolymer, a variety of different homopolymers mixing
The mixture of object, the mixture of homopolymer and block copolymer or homopolymer and random copolymer.Due to block copolymer difference
Molecule chain part will form different crystal region and amorphous area during Static Spinning, electronics or ion under the action of external electric field
The polarization to form interface is assembled in meeting in interface, generates polarization charge；And the mixture of two or more polymerizations passes through Static Spinning
The nanofiber of silk preparation can be grouped as by multiple polymers group, and will form interface between different polymers compositions, added outside
Point equally will form interfacial polarization under the action of, generate polarization charge, enhance electret effect.
A kind of preparation method of fresh air system electret nanofiber filtration material as described above, it is described dissolved with polymer
Liquid mixture in polymer be polytetrafluoroethylene (PTFE), it is FEP fluorinated ethylene propylene copolymer, polyfluorinated ethylene propylene, polypropylene, solvable
Property polytetrafluoroethylene (PTFE), Kynoar, polystyrene, polybutylene terephthalate, polyester, polyvinyl acetate, nylon 6, poly-
Styrene, polymethyl methacrylate, polyaniline, polyethylene glycol oxide, polyvinylpyrrolidone, polyacrylonitrile, gathers polyvinyl alcohol
Caprolactone, polyethylene glycol, polyurethane, polysulfones, polyether sulfone, Kynoar-hexafluoropropene, gathers at polyethylene terephthalate
It is any in vinylidene-tetrafluoroethylene-perfluoro methyl vinyl ether, Kynoar-chlorotrifluoroethylene and the above polymer
The mixture of two or three of polymer；It is wherein described to be divided dissolved with solvent in the liquid mixture of polymer according to type of polymer
Dui Ying not are as follows:
Kynoar: N,N-dimethylformamide (DMF), N-Methyl pyrrolidone (NMP), dimethyl acetamide
(DMAc), triethyl phosphate or dimethyl sulfoxide (DMSO)；
Polypropylene: normal heptane, tetrahydro fluoronaphthalene or dimethylbenzene；
Polybutylene terephthalate: methylene chloride, tetrahydrofuran (THF), chloroform or acetone；
Polyethylene terephthalate: methylene chloride, tetrahydrofuran, chloroform or acetone；
Polyarylate: methylene chloride, tetrahydrofuran, chloroform or acetone；
Polyvinyl acetate: toluene, acetone, ethyl alcohol, acetic acid, ethyl acetate or chloroform；
Nylon 6: formic acid；
Polyvinyl alcohol: water, ethyl alcohol, N,N-dimethylformamide or tetrahydrofuran；
Polymethyl methacrylate: chloroform, acetic acid, ethyl acetate, acetone or toluene；
Polyaniline: N,N-dimethylformamide or N-Methyl pyrrolidone；
Polyethylene glycol oxide: N,N-dimethylformamide, ethyl alcohol, water or chloroform；
Polyvinylpyrrolidone: water, ethyl alcohol, DMAC N,N' dimethyl acetamide or N,N-dimethylformamide；
Polyacrylonitrile: N,N-dimethylformamide or dimethyl sulfoxide；
Polycaprolactone: N,N-dimethylformamide or acetone；
Polyethylene glycol: water, ethyl alcohol or N,N-dimethylformamide；
Polyurethane: N,N-dimethylformamide, acetone or N-Methyl pyrrolidone；
Fluorinated polyurethane: N,N-dimethylformamide, acetone or N-Methyl pyrrolidone；
Polysulfones and polyether sulfone: N,N-dimethylformamide, acetone, N-Methyl pyrrolidone, dimethyl acetamide or tetrahydro
Furans；
Kynoar-hexafluoropropene: N,N-dimethylformamide, N-Methyl pyrrolidone, dimethyl acetamide, phosphoric acid
Triethyl or dimethyl sulfoxide；
Kynoar-tetrafluoroethylene-perfluoro methyl vinyl ether: N,N-dimethylformamide, N-Methyl pyrrolidone,
Dimethyl acetamide, triethyl phosphate or dimethyl sulfoxide；
Kynoar-chlorotrifluoroethylene: N,N-dimethylformamide, N-Methyl pyrrolidone, dimethyl acetamide, phosphorus
Triethylenetetraminehexaacetic acid ester or dimethyl sulfoxide；
The mixture solvent for use of above-mentioned any two or three of polymer: all polymerizations can be dissolved in above-mentioned solvent simultaneously
The mixture of the solvent of the single solvent of object or every kind of polymer；
Dissolved with the liquid mixture process for preparation of polymer are as follows: add a polymer in corresponding solvent, and use magnetic force
Agitating device continuously stirs 3~20h, it is ensured that polymer is completely dissolved.
A kind of preparation method of fresh air system electret nanofiber filtration material as described above, it is described dissolved with polymer
Liquid mixture be dispersed at least one inorganic nanoparticles, the inorganic nanoparticles be silica, aluminum oxide,
Zinc oxide, barium monoxide, titanium dioxide, tantalum pentoxide, barium titanate, lead zirconate titanate, silicon nitride, tourmaline, boehmite or sesquialter
Siloxanes, the additive amount of inorganic nanoparticles are 0.1~10wt% dissolved with the liquid mixture of polymer；Its process for preparation
Are as follows: first inorganic nanoparticles are added in solvent, then it will be added dissolved with the liquid mixture of polymer in 0.5~15h of ultrasound
In, 3~20h is continuously stirred with magnetic stirring apparatus.Inorganic nanoparticles exist as a kind of inorganic electret material in external electric field
Under conditions of have the injection of space charge and the generation of polarization charge, have very big humidification to electret effect, and
Inorganic electret mixes the interface generated with organic polymer can generate interfacial polarization in the presence of external electric field, generate polarization electricity
Lotus, it is same to enhance electret effect.
A kind of preparation method of fresh air system electret nanofiber filtration material as described above, the quick heating are solid
Change is realized by installing temperature control device at 3~5cm above spinning nozzle, and the temperature of the temperature control device is 50~300 DEG C, molten
There is the liquid mixture jet stream of polymer fast curing-formed for nanofiber after temperature control device.
A kind of preparation method of fresh air system electret nanofiber filtration material, the reception substrate are wood pulp
Cellulosic substrates, fiber base material or mixed fiber base material；
The wood pulp cellulose substrate is 0.5~5mNm of stiffness, 8~400g/m of grammes per square metre2Wood pulp cellulose filter paper or
Wood pulp cellulose non-woven cloth, wood pulp cellulose filter paper are the corrugation filter paper that corrugation depth is 0.1~3mm；
The fiber base material is the filter paper or non-woven cloth of cellulose fibre, polyester fiber or polyolefine fiber, stiffness
For 0.5~5mNm, grammes per square metre is 6~350g/m2；Filter paper is corrugation filter paper, and wherein the corrugation of cellulose fibre corrugation filter paper is deep
Degree is 0.1~3mm；
The mixed fiber base material is the two or more compositions in containing cellulose fiber, polyester fiber and polyolefine fiber
Composite fibre filter paper or non-woven cloth, stiffness be 0.5~5mNm, grammes per square metre be 6~350g/m2, the composite fibre
Filter paper be corrugation filter paper, wherein the corrugation depth of the corrugation filter paper of containing cellulose fiber be 0.1~3mm.
The present invention also provides a kind of using fresh air system electret nanofiber mistake made from preparation method as described above
Filter material material, the fresh air system with electret nanofiber filtration material be fiber between without adhesion and fluffy three-dimensional netted intercommunication knot
Structure, including substrate layer and layers of nanofibers；Substrate layer is porous wood pulp cellulose substrate, fiber base material or mixed fiber base
Material, fibre diameter are 10~50 μm, and aperture size is 3~120 μm；The nanofiber diameter of layers of nanofibers is 0.5~0.8
μm, nanofiber grammes per square metre is 0.01~70g/m2, porosity of=80%；Fresh air system electret nanofiber filtration material
Surface electrostatic potential is 1700~2300V, 150 ° of hydrophobic angle >, to the filter efficiency of 0.006~1 μm of particle be 50~
99.999%, pressure drag is less than 20Pa, and dust containing capacity is 50~3600g/m2, fresh air system electret nanofiber filtration material
Save a month charge it is undamped, hence it is evident that better than without " rapid curing " technology preparation material (3~5 days charge decay 30~
40%).
Invention mechanism:
Since the liquid mixture dissolved with polymer is under the action of electrostatic field, a large amount of polarization charges can be generated, at this time
Polarization charge is easy due to being influenced by molecular chain movement, environment temperature and humidity etc., and polarized molecule is easy
Existing depolarization phenomenon, causes electret effect poor, and the liquid that can make in a very short period of time dissolved with polymer that is quickly heating and curing
Body mixture is converted into non-streaming dynamic from flowable state, with quick " freezing " strand, prevents the generation of depolarization phenomenon, promotion is stayed
Pole effect reduces electron escape energy in addition, instantaneous temperature reduction provides so that the kinetic energy for the space charge that polymer has trapped reduces
Power can strengthen the storage of the charge in space moment, strengthen electret effect, electret nanofiber filtration material electricity produced by the present invention
Lotus decaying is slow, and 3~5 days charge decay 30~40% of product obtained, product of the present invention performance boost are huge compared with the prior art
Greatly, it is undamped to can be reserved for a month charge for product of the present invention.
The utility model has the advantages that
(1) a kind of fresh air system electret nanofiber filtration material prepared by the present invention is handled through " rapid curing "
Static Spinning electret material, Surface electrostatic potential are remarkably reinforced, and are 1700~2300V, and common electrostatic spinning electret material surface is quiet
Potential generally only 300~1200V；The electret service life greatly enhances, and preservation one month charge is undamped, and common electrostatic
Spin one month charge decay 50% of electret material；
(2) preparation method of a kind of fresh air system electret nanofiber filtration material of the invention, have it is easy to operate,
The advantages that at low cost, small to equipment requirement, great application prospect.
Specific embodiment
The invention will be further elucidated with reference to specific embodiments.It should be understood that these embodiments are merely to illustrate this hair
It is bright rather than limit the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, art technology
Personnel can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Fixed range.
Embodiment 1
A kind of preparation method of fresh air system electret nanofiber filtration material, the specific steps of which are as follows:
(1) it prepares the liquid mixture dissolved with polymer: Kynoar is added in n,N-Dimethylformamide, and
11h is continuously stirred with magnetic stirring apparatus；
(2) electrostatic spinning is carried out after the liquid mixture dissolved with polymer that mass concentration is 22% being heated to 50 DEG C,
It is quickly heating and curing during electrostatic spinning to the liquid mixture dissolved with polymer of spinneret orifice, wherein quickly heating
Solidification is that the liquid mixture dissolved with polymer is instigated to be warming up to 153 DEG C in 0.3ms at die orifice exit 3cm, Static Spinning
The technological parameter of silk are as follows: voltage 50KV, receiving distance is 20cm, and rate of flooding 0.1mL/h, temperature is 20 DEG C, and humidity is
55%；
(3) fiber obtained by electrostatic spinning receives after substrate receives instantaneous temperature reduction to 0 DEG C hereinafter, obtained fresh air system is with staying
Pole nanofiber filtration material, wherein the mode of instantaneous temperature reduction is that a liquid nitrogen constant speed is equipped at the back side 30mm for receiving substrate
Release device, the rate of release of liquid nitrogen constant release device are 20L/min, and it is 3.2mNm, grammes per square metre that reception substrate, which is stiffness,
210g/m2, corrugation depth is the wood pulp cellulose filter paper of 1.5mm.
The fresh air system as made from above-mentioned preparation method with electret nanofiber filtration material be fiber between without adhesion and fluffy
The three-dimensional netted interworking architecture of pine, including substrate layer and layers of nanofibers；Substrate layer is porous wood pulp cellulose substrate, fine
Tieing up diameter is 13 μm, and aperture size is 50 μm；The nanofiber diameter of layers of nanofibers is 0.5 μm, and nanofiber grammes per square metre is
60.2g/m2, porosity 90%；Fresh air system is 2000V, hydrophobic angle with electret nanofiber filtration material Surface electrostatic potential
It is 190 °, to the filter efficiency of 0.006~1 μm of particle up to 88.2%, pressure drag 15Pa, dust containing capacity 50g/m2, save
Charge is undamped within one month.
Comparative example 1
A kind of preparation method of fresh air system electret nanofiber filtration material, specific steps and embodiment 1 are basic
It is identical, the difference is that the flash cure process without step (2), directly will carry out electrostatic dissolved with the liquid mixture of polymer
The filtering material is made in instantaneous temperature reduction after fiber obtained by spinning is received with fiber base material, final nanofiber filtration material obtained
Electret effect, that is, strainability it is poor, Surface electrostatic potential 1200V, hydrophobic angle be 100 °, to 0.006~1 μm of particle
Filter efficiency be 45%, pressure drag 24Pa, save 3 days charge decay 40%, hence it is evident that be lower than electret nanometer prepared by the present invention
Fiber filter material.Compared with the filtering material made from the embodiment of the present invention 1, fresh air system of the present invention electret nanofiber mistake
The filtering material electret effect that filter material material is prepared is good, has excellent performance, and charge decay is slow, great application prospect.
Embodiment 2~24
A kind of preparation method of fresh air system electret nanofiber filtration material, specific steps and embodiment 1 are consistent,
Unlike step (1) type of selected polymer and solvent and final when preparing the liquid mixture dissolved with polymer
The performance of product obtained, specifically see the table below, and in table, A indicates that Surface electrostatic potential, B indicate the mistake to 0.006~1 μm of particle
Filter efficiency, fibre diameter unit be μm, aperture size unit be μm；The nanofiber diameter unit of layers of nanofibers be μm, receive
Rice fiber grammes per square metre unit is g/m2, porosity unit is %；A unit is V, and hydrophobic angular unit is (°), and B unit is %, pressure drag list
Position is Pa, and dust containing capacity unit is g/m2:
Embodiment 25
A kind of preparation method of fresh air system electret nanofiber filtration material, the specific steps of which are as follows:
(1) it prepares the liquid mixture dissolved with polymer: Kynoar being added in N-Methyl pyrrolidone, is used in combination
Magnetic stirring apparatus continuously stirs 18h；
(2) electrostatic spinning is carried out after the liquid mixture dissolved with polymer that mass concentration is 36% being heated to 85 DEG C,
It is quickly heating and curing during electrostatic spinning to the liquid mixture dissolved with polymer of spinneret orifice, wherein quickly heating
Solidification is that the liquid mixture dissolved with polymer is instigated to be warming up to 220 DEG C in 0.1ms at die orifice exit 4cm, Static Spinning
The technological parameter of silk are as follows: voltage 20KV, receiving distance is 10cm, and rate of flooding 5.2mL/h, temperature is 15 DEG C, and humidity is
60%；
(3) fiber obtained by electrostatic spinning receives after substrate receives instantaneous temperature reduction to 0 DEG C hereinafter, obtained fresh air system is with staying
Pole nanofiber filtration material, wherein the mode of instantaneous temperature reduction is that a liquid nitrogen constant speed is equipped at the back side 1mm for receiving substrate
Release device, the rate of release of liquid nitrogen constant release device are 60L/min, and it is 5mNm, grammes per square metre 400g/ that reception substrate, which is stiffness,
m2, corrugation depth is the wood pulp cellulose filter paper of 0.1mm.
The fresh air system as made from above-mentioned preparation method with electret nanofiber filtration material be fiber between without adhesion and fluffy
The three-dimensional netted interworking architecture of pine, including substrate layer and layers of nanofibers；Substrate layer is porous wood pulp cellulose substrate, fine
Tieing up diameter is 20 μm, and aperture size is 80 μm；The nanofiber diameter of layers of nanofibers is 0.7 μm, and nanofiber grammes per square metre is
0.08g/m2, porosity 85.0%；Fresh air system is 1900V with electret nanofiber filtration material Surface electrostatic potential, hydrophobic
Angle is 160 °, to the filter efficiency of 0.006~1 μm of particle up to 50%, pressure drag 10Pa, dust containing capacity 1200g/m2, protect
It is undamped to deposit a month charge.
Embodiment 26
A kind of preparation method of fresh air system electret nanofiber filtration material, the specific steps of which are as follows:
(1) it prepares the liquid mixture dissolved with polymer: Kynoar being added in dimethyl acetamide, and uses magnetic
Power agitating device continuously stirs 5h；
(2) electrostatic spinning is carried out after the liquid mixture dissolved with polymer that mass concentration is 12% being heated to 30 DEG C,
It is quickly heating and curing during electrostatic spinning to the liquid mixture dissolved with polymer of spinneret orifice, wherein quickly heating
Solidification is that the liquid mixture dissolved with polymer is instigated to be warming up to 170 DEG C in 0.9ms at die orifice exit 5cm, Static Spinning
The technological parameter of silk are as follows: voltage 15KV, receiving distance is 28cm, and rate of flooding 10mL/h, temperature is 30 DEG C, humidity 5%；
(3) fiber obtained by electrostatic spinning receives after substrate receives instantaneous temperature reduction to 0 DEG C hereinafter, obtained fresh air system is with staying
Pole nanofiber filtration material, wherein the mode of instantaneous temperature reduction is that a liquid nitrogen constant speed is equipped at the back side 60mm for receiving substrate
Release device, the rate of release of liquid nitrogen constant release device are 90L/min, and it is 5mNm, grammes per square metre 100g/ that reception substrate, which is stiffness,
m2, corrugation depth is the wood pulp cellulose filter paper of 2.5mm.
The fresh air system as made from above-mentioned preparation method with electret nanofiber filtration material be fiber between without adhesion and fluffy
The three-dimensional netted interworking architecture of pine, including substrate layer and layers of nanofibers；Substrate layer is porous wood pulp cellulose substrate, fine
Tieing up diameter is 28 μm, and aperture size is 100 μm；The nanofiber diameter of layers of nanofibers is 0.5 μm, and nanofiber grammes per square metre is
0.15g/m2, porosity 83%；Fresh air system is 2100V, hydrophobic angle with electret nanofiber filtration material Surface electrostatic potential
It is 200 °, to the filter efficiency of 0.006~1 μm of particle up to 60.8%, pressure drag 19Pa, dust containing capacity 100g/m2, save
Charge is undamped within one month.
Embodiment 27
A kind of preparation method of fresh air system electret nanofiber filtration material, the specific steps of which are as follows:
(1) it prepares the liquid mixture dissolved with polymer: Kynoar being added in triethyl phosphate, and uses magnetic force
Agitating device continuously stirs 3h；
(2) electrostatic spinning is carried out after the liquid mixture dissolved with polymer that mass concentration is 10% being heated to 100 DEG C,
It is quickly heating and curing during electrostatic spinning to the liquid mixture dissolved with polymer of spinneret orifice, wherein quickly heating
Solidification is that the liquid mixture dissolved with polymer is instigated to be warming up to 230 DEG C in 0.5ms at die orifice exit 5cm, Static Spinning
The technological parameter of silk are as follows: voltage 5KV, receiving distance is 3cm, and rate of flooding 0.5mL/h, temperature is 35 DEG C, humidity 62%；
(3) fiber obtained by electrostatic spinning receives after substrate receives instantaneous temperature reduction to 0 DEG C hereinafter, obtained fresh air system is with staying
Pole nanofiber filtration material, wherein the mode of instantaneous temperature reduction is that a liquid nitrogen constant speed is equipped at the back side 90mm for receiving substrate
Release device, the rate of release of liquid nitrogen constant release device are 1L/min, and it is 2.5mNm, grammes per square metre 8g/ that reception substrate, which is stiffness,
m2Wood pulp cellulose non-woven cloth.
The fresh air system as made from above-mentioned preparation method with electret nanofiber filtration material be fiber between without adhesion and fluffy
The three-dimensional netted interworking architecture of pine, including substrate layer and layers of nanofibers；Substrate layer is porous wood pulp cellulose substrate, fine
Tieing up diameter is 30 μm, and aperture size is 3 μm；The nanofiber diameter of layers of nanofibers is 0.8 μm, and nanofiber grammes per square metre is
23.8g/m2, porosity 92%；Fresh air system is 1700V, hydrophobic angle with electret nanofiber filtration material Surface electrostatic potential
It is 175 °, to the filter efficiency of 0.006~1 μm of particle up to 99.2%, pressure drag 19Pa, dust containing capacity 300g/m2, save
Charge is undamped within one month.
Embodiment 28
A kind of preparation method of fresh air system electret nanofiber filtration material, the specific steps of which are as follows:
(1) it prepares the liquid mixture dissolved with polymer: Kynoar being added in dimethyl sulfoxide, and uses magnetic force
Agitating device continuously stirs 17h；
(2) electrostatic spinning is carried out after the liquid mixture dissolved with polymer that mass concentration is 3% being heated to 55 DEG C,
It is quickly heating and curing during electrostatic spinning to the liquid mixture dissolved with polymer of spinneret orifice, wherein quickly heating is solid
Change is that the liquid mixture dissolved with polymer is instigated to be warming up to 218 DEG C in 0.8ms at die orifice exit 3.5cm, Static Spinning
The technological parameter of silk are as follows: voltage 35KV, receiving distance is 32cm, and rate of flooding 0.1mL/h, temperature is 15 DEG C, and humidity is
48%；
(3) fiber obtained by electrostatic spinning receives after substrate receives instantaneous temperature reduction to 0 DEG C hereinafter, obtained fresh air system is with staying
Pole nanofiber filtration material, wherein the mode of instantaneous temperature reduction is that a liquid nitrogen constant speed is equipped at the back side 60mm for receiving substrate
Release device, the rate of release of liquid nitrogen constant release device are 100L/min, and it is 4mNm that reception substrate, which is stiffness, and grammes per square metre is
6g/m2, corrugation depth is the corrugation filter paper of the containing cellulose fiber of 1mm.
The fresh air system as made from above-mentioned preparation method with electret nanofiber filtration material be fiber between without adhesion and fluffy
The three-dimensional netted interworking architecture of pine, including substrate layer and layers of nanofibers；Substrate layer is porous fiber base material, fibre diameter
It is 10 μm, aperture size is 40 μm；The nanofiber diameter of layers of nanofibers is 0.8 μm, and nanofiber grammes per square metre is 70g/m2, hole
Gap rate is 80%；Fresh air system is 2300V with electret nanofiber filtration material Surface electrostatic potential, and hydrophobic angle is 190 °, right
The filter efficiency of 0.006~1 μm of particle is up to 99.999%, pressure drag 8Pa, dust containing capacity 3600g/m2, save one month
Charge is undamped.
Embodiment 29~49
A kind of preparation method of fresh air system electret nanofiber filtration material, specific steps and embodiment 28 1
Cause, unlike step (1) when preparing the liquid mixture dissolved with polymer the type of selected polymer and solvent and
The performance of final product obtained, specifically see the table below, and in table, A indicates that Surface electrostatic potential, B indicate the particle to 0.006~1 μm
Filter efficiency, fibre diameter unit be μm, aperture size unit be μm；The nanofiber diameter unit of layers of nanofibers is μ
M, nanofiber grammes per square metre unit are g/m2, porosity unit is %；A unit is V, and hydrophobic angular unit is (°), and B unit is %, pressure
Resistance unit is Pa, and dust containing capacity unit is g/m2:
Embodiment 50
A kind of preparation method of fresh air system electret nanofiber filtration material, the specific steps of which are as follows:
(1) it prepares the liquid mixture dissolved with polymer: nylon 6 being added in formic acid, and is connected with magnetic stirring apparatus
Continuous stirring 6h；
(2) electrostatic spinning is carried out after the liquid mixture dissolved with polymer that mass concentration is 33% being heated to 120 DEG C,
It is quickly heating and curing during electrostatic spinning to the liquid mixture dissolved with polymer of spinneret orifice, wherein quickly heating
Solidification is that the liquid mixture dissolved with polymer is instigated to be warming up to 170 DEG C in 0.9ms at die orifice exit 4cm, Static Spinning
The technological parameter of silk are as follows: voltage 70KV, receiving distance is 40cm, and rate of flooding 5mL/h, temperature is 30 DEG C, humidity 90%；
(3) fiber obtained by electrostatic spinning receives after substrate receives instantaneous temperature reduction to 0 DEG C hereinafter, obtained fresh air system is with staying
Pole nanofiber filtration material, wherein the mode of instantaneous temperature reduction is that a liquid nitrogen perseverance is equipped at the back side 100mm for receiving substrate
Fast release device, the rate of release of liquid nitrogen constant release device are 20L/min, and it is 0.5mNm, grammes per square metre that reception substrate, which is stiffness,
For 350g/m2The non-woven cloth containing polyester fiber.
The fresh air system as made from above-mentioned preparation method with electret nanofiber filtration material be fiber between without adhesion and fluffy
The three-dimensional netted interworking architecture of pine, including substrate layer and layers of nanofibers；Substrate layer is porous fiber base material, fibre diameter
It is 40 μm, aperture size is 10 μm；The nanofiber diameter of layers of nanofibers is 0.6 μm, and nanofiber grammes per square metre is 0.88g/m2,
Porosity is 84%；Fresh air system is 1800V with electret nanofiber filtration material Surface electrostatic potential, and hydrophobic angle is 180 °, right
The filter efficiency of 0.006~1 μm of particle is up to 92.558%, pressure drag 10Pa, dust containing capacity 1000g/m2, save one month
Charge is undamped.
Embodiment 51
A kind of preparation method of fresh air system electret nanofiber filtration material, the specific steps of which are as follows:
(1) it prepares the liquid mixture dissolved with polymer: polyvinyl alcohol being added to the water, and is connected with magnetic stirring apparatus
Continuous stirring 8h；
(2) electrostatic spinning is carried out after the liquid mixture dissolved with polymer that mass concentration is 20% being heated to 110 DEG C,
It is quickly heating and curing during electrostatic spinning to the liquid mixture dissolved with polymer of spinneret orifice, wherein quickly heating
Solidification is that the liquid mixture dissolved with polymer is instigated to be warming up to 165 DEG C in 0.3ms at die orifice exit 4cm, Static Spinning
The technological parameter of silk are as follows: voltage 60KV, receiving distance is 5cm, and rate of flooding 0.1mL/h, temperature is 20 DEG C, and humidity is
63%；
(3) fiber obtained by electrostatic spinning receives after substrate receives instantaneous temperature reduction to 0 DEG C hereinafter, obtained fresh air system is with staying
Pole nanofiber filtration material, wherein the mode of instantaneous temperature reduction is that a liquid nitrogen constant speed is equipped at the back side 50mm for receiving substrate
Release device, the rate of release of liquid nitrogen constant release device are 10L/min, and it is 5mNm that reception substrate, which is stiffness, and grammes per square metre is
200g/m2The non-woven cloth containing polyolefine fiber.
The fresh air system as made from above-mentioned preparation method with electret nanofiber filtration material be fiber between without adhesion and fluffy
The three-dimensional netted interworking architecture of pine, including substrate layer and layers of nanofibers；Substrate layer is porous fiber base material, fibre diameter
It is 50 μm, aperture size is 3 μm；The nanofiber diameter of layers of nanofibers is 0.7 μm, and nanofiber grammes per square metre is 0.01g/m2,
Porosity is 91%；Fresh air system is 1700V with electret nanofiber filtration material Surface electrostatic potential, and hydrophobic angle is 175 °, right
The filter efficiency of 0.006~1 μm of particle is up to 50.88%, pressure drag 10Pa, dust containing capacity 3200g/m2, save one month
Charge is undamped.
Embodiment 52
A kind of preparation method of fresh air system electret nanofiber filtration material, the specific steps of which are as follows:
(1) it prepares the liquid mixture dissolved with polymer: polyvinyl alcohol being added in ethyl alcohol, and uses magnetic stirring apparatus
Continuously stir 18h；
(2) electrostatic spinning is carried out after the liquid mixture dissolved with polymer that mass concentration is 31% being heated to 50 DEG C,
It is quickly heating and curing during electrostatic spinning to the liquid mixture dissolved with polymer of spinneret orifice, wherein quickly heating
Solidification is that the liquid mixture dissolved with polymer is instigated to be warming up to 220 DEG C in 0.2ms at die orifice exit 5cm, Static Spinning
The technological parameter of silk are as follows: voltage 40KV, receiving distance is 40cm, and rate of flooding 2mL/h, temperature is 30 DEG C, humidity 5%；
(3) fiber obtained by electrostatic spinning receives after substrate receives instantaneous temperature reduction to 0 DEG C hereinafter, obtained fresh air system is with staying
Pole nanofiber filtration material, wherein the mode of instantaneous temperature reduction is that a liquid nitrogen constant speed is equipped at the back side 80mm for receiving substrate
Release device, the rate of release of liquid nitrogen constant release device are 35L/min；It is 2.5mNm that reception substrate, which is stiffness, and grammes per square metre is
95g/m2, the corrugation filter paper and stiffness for the containing cellulose fiber that corrugation depth is 3mm are 2.5mNm, grammes per square metre 120g/m2It is poly-
The composite fibre substrate of ester fiber non-woven cloth composition.
The fresh air system as made from above-mentioned preparation method with electret nanofiber filtration material be fiber between without adhesion and fluffy
The three-dimensional netted interworking architecture of pine, including substrate layer and layers of nanofibers；Substrate layer is porous mixed fiber base material, fine
Tieing up diameter is 28 μm, and aperture size is 55 μm；The nanofiber diameter of layers of nanofibers is 0.5 μm, and nanofiber grammes per square metre is
0.08g/m2, porosity 81%；Fresh air system is 1900V, hydrophobic angle with electret nanofiber filtration material Surface electrostatic potential
It is 160 °, to the filter efficiency of 0.006~1 μm of particle up to 84.21%, pressure drag 12Pa, dust containing capacity 2000g/m2, protect
It is undamped to deposit a month charge.
Embodiment 53~83
A kind of preparation method of fresh air system electret nanofiber filtration material, specific steps and embodiment 52 1
Cause, unlike step (1) when preparing the liquid mixture dissolved with polymer the type of selected polymer and solvent and
The performance of final product obtained, specifically see the table below, and in table, A indicates that Surface electrostatic potential, B indicate the particle to 0.006~1 μm
Filter efficiency, fibre diameter unit be μm, aperture size unit be μm；The nanofiber diameter unit of layers of nanofibers is μ
M, nanofiber grammes per square metre unit are g/m2, porosity unit is %；A unit is V, and hydrophobic angular unit is (°), and B unit is %, pressure
Resistance unit is Pa, and dust containing capacity unit is g/m2:
Embodiment 84
A kind of preparation method of fresh air system electret nanofiber filtration material, the specific steps of which are as follows:
(1) it prepares the liquid mixture dissolved with polymer: polyvinyl alcohol being added in n,N-Dimethylformamide, is used in combination
Magnetic stirring apparatus continuously stirs 20h；
(2) electrostatic spinning is carried out after the liquid mixture dissolved with polymer that mass concentration is 40% being heated to 75 DEG C,
It is quickly heating and curing during electrostatic spinning to the liquid mixture dissolved with polymer of spinneret orifice, wherein quickly heating
Solidification is that the liquid mixture dissolved with polymer is instigated to be warming up to 155 DEG C in 0.6ms at die orifice exit 4.5cm, electrostatic
The technological parameter of spinning are as follows: voltage 70KV, receiving distance is 30cm, and rate of flooding 10mL/h, temperature is 15 DEG C, and humidity is
12%；
(3) fiber obtained by electrostatic spinning receives after substrate receives instantaneous temperature reduction to 0 DEG C hereinafter, obtained fresh air system is with staying
Pole nanofiber filtration material, wherein the mode of instantaneous temperature reduction is that a liquid nitrogen perseverance is equipped at the back side 100mm for receiving substrate
Fast release device, the rate of release of liquid nitrogen constant release device are 1L/min；It is 1.5mNm that reception substrate, which is stiffness, and grammes per square metre is
80g/m2, the corrugation filter paper and stiffness for the containing cellulose fiber that corrugation depth is 0.1mm are 4.0mNm, grammes per square metre 200g/m2's
The composite fibre substrate of polyolefine fiber non-woven cloth composition.
The fresh air system as made from above-mentioned preparation method with electret nanofiber filtration material be fiber between without adhesion and fluffy
The three-dimensional netted interworking architecture of pine, including substrate layer and layers of nanofibers；Substrate layer is porous mixed fiber base material, fine
Tieing up diameter is 15 μm, and aperture size is 42 μm；The nanofiber diameter of layers of nanofibers is 0.6 μm, and nanofiber grammes per square metre is
50.0g/m2, porosity 80%；Fresh air system is 2100V, hydrophobic angle with electret nanofiber filtration material Surface electrostatic potential
It is 190 °, to the filter efficiency of 0.006~1 μm of particle up to 50%, pressure drag 3Pa, dust containing capacity 50g/m2, save one
Month charge is undamped.
Embodiment 85
A kind of preparation method of fresh air system electret nanofiber filtration material, the specific steps of which are as follows:
(1) it prepares the liquid mixture dissolved with polymer: polyvinyl alcohol being added in tetrahydrofuran, and uses magnetic agitation
Device continuously stirs 4h；
(2) electrostatic spinning is carried out after the liquid mixture dissolved with polymer that mass concentration is 14% being heated to 90 DEG C,
It is quickly heating and curing during electrostatic spinning to the liquid mixture dissolved with polymer of spinneret orifice, wherein quickly heating
Solidification is that the liquid mixture dissolved with polymer is instigated to be warming up to 170 DEG C in 0.9ms at die orifice exit 5cm, Static Spinning
The technological parameter of silk are as follows: voltage 10KV, receiving distance is 3cm, and rate of flooding 10mL/h, temperature is 25 DEG C, humidity 30%；
(3) fiber obtained by electrostatic spinning receives after substrate receives instantaneous temperature reduction to 0 DEG C hereinafter, obtained fresh air system is with staying
Pole nanofiber filtration material, wherein the mode of instantaneous temperature reduction is that a liquid nitrogen constant speed is equipped at the back side 50mm for receiving substrate
Release device, the rate of release of liquid nitrogen constant release device are 100L/min；It is 3mNm that reception substrate, which is stiffness, and grammes per square metre is
310g/m2, the corrugation filter paper and stiffness for the containing cellulose fiber that corrugation depth is 2.4mm are 1mNm, grammes per square metre 300g/m2's
Polyolefine fiber non-woven cloth and stiffness are 0.5mNm, grammes per square metre 350g/m2Non-woven fabric of polyester fiber composition it is mixed
Condensating fiber substrate.
The fresh air system as made from above-mentioned preparation method with electret nanofiber filtration material be fiber between without adhesion and fluffy
The three-dimensional netted interworking architecture of pine, including substrate layer and layers of nanofibers；Substrate layer is porous mixed fiber base material, fine
Tieing up diameter is 20 μm, and aperture size is 8 μm；The nanofiber diameter of layers of nanofibers is 0.5 μm, and nanofiber grammes per square metre is
33.8g/m2, porosity 80%；Fresh air system is 2200V, hydrophobic angle with electret nanofiber filtration material Surface electrostatic potential
It is 210 °, to the filter efficiency of 0.006~1 μm of particle up to 96.5%, pressure drag 15Pa, dust containing capacity 100/m2, save
Charge is undamped within one month.
Embodiment 86
A kind of preparation method of fresh air system electret nanofiber filtration material, specific steps and embodiment 85 are basic
Unanimously, contain inorganic nanoparticles, process for preparation in the liquid mixture dissolved with polymer that different step (1) is prepared are as follows:
First silica is added in tetrahydrofuran, ultrasonic 15h, then will prepare the obtained liquid dissolved with polymer with embodiment 94
Mixture is added thereto, and continuously stirs 3h with magnetic stirring apparatus, and wherein the content of silica in the solution is polyvinyl alcohol
With silica total amount 5.8wt%.
The fresh air system as made from above-mentioned preparation method with electret nanofiber filtration material be fiber between without adhesion and fluffy
The three-dimensional netted interworking architecture of pine, including substrate layer and layers of nanofibers；Substrate layer is porous mixed fiber base material, fine
Tieing up diameter is 40 μm, and aperture size is 100 μm；The nanofiber diameter of layers of nanofibers is 0.5 μm, and nanofiber grammes per square metre is
1.8g/m2, porosity 88%；Fresh air system is 1800V with electret nanofiber filtration material Surface electrostatic potential, and hydrophobic angle is
160 °, to the filter efficiency of 0.006~1 μm of particle up to 60%, pressure drag 19Pa, dust containing capacity 3300g/m2, save one
Charge is undamped within a month.
Embodiment 87
A kind of preparation method of fresh air system electret nanofiber filtration material, specific steps and embodiment 85 are basic
Unanimously, contain inorganic nanoparticles, process for preparation in the liquid mixture dissolved with polymer that different step (1) is prepared are as follows:
First aluminum oxide is added in tetrahydrofuran, ultrasonic 0.5h, then by prepare with embodiment 94 obtain dissolved with polymer
Liquid mixture is added thereto, and continuously stirs 3h with magnetic stirring apparatus, and wherein the content of aluminum oxide in the solution is poly-
Vinyl alcohol and aluminum oxide total amount 0.1wt%.
The fresh air system as made from above-mentioned preparation method with electret nanofiber filtration material be fiber between without adhesion and fluffy
The three-dimensional netted interworking architecture of pine, including substrate layer and layers of nanofibers；Substrate layer is porous mixed fiber base material, fine
Tieing up diameter is 33 μm, and aperture size is 95 μm；The nanofiber diameter of layers of nanofibers is 0.8 μm, and nanofiber grammes per square metre is
40.8g/m2, porosity 84%；Fresh air system is 1700V, hydrophobic angle with electret nanofiber filtration material Surface electrostatic potential
It is 200 °, to the filter efficiency of 0.006~1 μm of particle up to 90.59%, pressure drag 5Pa, dust containing capacity 2500g/m2, protect
It is undamped to deposit a month charge.
Embodiment 88
A kind of preparation method of fresh air system electret nanofiber filtration material, specific steps and embodiment 85 are basic
Unanimously, contain inorganic nanoparticles, process for preparation in the liquid mixture dissolved with polymer that different step (1) is prepared are as follows:
First zinc oxide is added in tetrahydrofuran, ultrasonic 5h, then will prepare the obtained liquid dissolved with polymer with embodiment 94 and mix
It closes object to be added thereto, continuously stirs 5h with magnetic stirring apparatus, wherein the content of zinc oxide in the solution is polyvinyl alcohol and oxygen
Change zinc total amount 10wt%.
The fresh air system as made from above-mentioned preparation method with electret nanofiber filtration material be fiber between without adhesion and fluffy
The three-dimensional netted interworking architecture of pine, including substrate layer and layers of nanofibers；Substrate layer is porous mixed fiber base material, fine
Tieing up diameter is 27 μm, and aperture size is 120 μm；The nanofiber diameter of layers of nanofibers is 0.7 μm, and nanofiber grammes per square metre is
0.01g/m2, porosity 86%；Fresh air system is 1900V, hydrophobic angle with electret nanofiber filtration material Surface electrostatic potential
It is 180 °, to the filter efficiency of 0.006~1 μm of particle up to 63.999%, pressure drag 11Pa, dust containing capacity 50g/m2, protect
It is undamped to deposit a month charge.
Embodiment 89~97
A kind of preparation method of fresh air system electret nanofiber filtration material, specific steps and embodiment 88 are basic
Unanimously, the type prepared unlike dissolved with the inorganic nanoparticles being added in the liquid mixture of polymer is made with final
Product performance, specifically see the table below, in table, A indicates that Surface electrostatic potential, B indicate that the filtering to 0.006~1 μm of particle is imitated
Rate, fibre diameter unit be μm, aperture size unit be μm；The nanofiber diameter unit of layers of nanofibers be μm, Nanowire
Dimension grammes per square metre unit is g/m2, porosity unit is %；A unit is V, and hydrophobic angular unit is (°), and B unit is %, and pressure drag unit is
Pa, dust containing capacity unit are g/m2:
Embodiment 98
A kind of preparation method of fresh air system electret nanofiber filtration material, the specific steps of which are as follows:
(1) it prepares the liquid mixture dissolved with polymer: polyvinyl alcohol being added in tetrahydrofuran, and uses magnetic agitation
Device continuously stirs 4h；
(2) electrostatic spinning is carried out after the liquid mixture dissolved with polymer that mass concentration is 14% being heated to 90 DEG C,
It is quickly heating and curing during electrostatic spinning to the liquid mixture dissolved with polymer of spinneret orifice, wherein quickly heating
Solidification is that the liquid mixture dissolved with polymer is instigated to be warming up to 170 DEG C in 0.9ms at die orifice exit 5cm, Static Spinning
The technological parameter of silk are as follows: voltage 10KV, receiving distance is 3cm, and rate of flooding 10mL/h, temperature is 25 DEG C, humidity 30%；
(3) fresh air system electret Nanofiber filter material is made after being received with reception substrate in fiber obtained by electrostatic spinning
Material；It is 3mNm, grammes per square metre 310g/m that reception substrate, which is stiffness,2, corrugation depth is the corrugation filter of the containing cellulose fiber of 2.1mm
Paper and stiffness are 1mNm, grammes per square metre 300g/m2Polyolefine fiber non-woven cloth and stiffness be 0.1mNm, grammes per square metre is
350g/m2Non-woven fabric of polyester fiber composition composite fibre substrate.
The fresh air system as made from above-mentioned preparation method with electret nanofiber filtration material be fiber between without adhesion and fluffy
The three-dimensional netted interworking architecture of pine, including substrate layer and layers of nanofibers；Substrate layer is porous mixed fiber base material, fine
Tieing up diameter is 20 μm, and aperture size is 8 μm；The nanofiber diameter of layers of nanofibers is 0.5 μm, and nanofiber grammes per square metre is
33.8g/m2, porosity 80%；Fresh air system is 2100V, hydrophobic angle with electret nanofiber filtration material Surface electrostatic potential
It is 200 °, to the filter efficiency of 0.006~1 μm of particle up to 92.5%, pressure drag 10Pa, dust containing capacity 90/m2, save one
Charge is undamped within a month.
Claims (8)
1. a kind of fresh air system preparation method of electret nanofiber filtration material, it is characterized in that: to the liquid dissolved with polymer
Body mixture carries out electrostatic spinning and obtains fresh air system electret nanofiber filtration material, to spray during electrostatic spinning
The liquid mixture dissolved with polymer of wire hole outlet is quickly heating and curing；Described be quickly heating and curing is instigated dissolved with poly-
The liquid mixture for closing object is warming up to T at 3~5cm of die orifice exit in 0.1~0.9ms, and T >=dissolved with the liquid of polymer
The boiling point of solvent in mixture.
2. a kind of preparation method of the fresh air system according to claim 1 with electret nanofiber filtration material, feature
It is, the technological parameter of the electrostatic spinning are as follows: dissolved with 30~120 DEG C of liquid mixture temperature of polymer, voltage 5~
70KV, receive 3~40cm of distance, 0.1~10mL/h of rate of flooding, 15~35 DEG C of environment temperature, humidity 5~90%；It is described molten
The mass concentration for having polymer in the liquid mixture of polymer is 3~40%.
3. a kind of preparation method of the fresh air system according to claim 2 with electret nanofiber filtration material, feature
It is, fiber made from electrostatic spinning carries out instantaneous temperature reduction processing after being received with reception substrate, and the instantaneous temperature reduction, which refers to, to be spun
For nanofiber with when receiving at a distance from substrate less than 1mm, nanofiber is reduced to 0 within the time less than 5s after contacting with liquid nitrogen
DEG C or less；The instantaneous temperature reduction is that a liquid nitrogen constant speed is arranged at 1~100mm of substrate by receiving in the back side distance for receiving substrate
What release device was realized, the rate of release of the liquid nitrogen constant release device is 1~100L/min.
4. a kind of preparation method of the fresh air system according to claim 3 with electret nanofiber filtration material, feature
It is, the polymer in the liquid mixture dissolved with polymer is polytetrafluoroethylene (PTFE), FEP fluorinated ethylene propylene copolymer, poly- perfluor
Second propylene, soluble poly tetrafluoroethene, Kynoar, polystyrene, polybutylene terephthalate, polyester, is gathered polypropylene
Vinyl acetate, nylon 6, polystyrene, polyvinyl alcohol, polymethyl methacrylate, polyaniline, polyethylene glycol oxide, polyethylene pyrrole
Pyrrolidone, polycaprolactone, polyethylene terephthalate, polyethylene glycol, polyurethane, polysulfones, polyether sulfone, gathers partially polyacrylonitrile
Vinyl fluoride-hexafluoropropene, Kynoar-tetrafluoroethylene-perfluoro methyl vinyl ether, Kynoar-chlorotrifluoroethylene with
And in the above polymer any two or three of polymer mixture；Wherein the liquid mixture dissolved with polymer is molten
Agent is respectively corresponded according to type of polymer are as follows:
Kynoar: N,N-dimethylformamide, N-Methyl pyrrolidone, dimethyl acetamide, triethyl phosphate or diformazan
Base sulfoxide；
Polypropylene: normal heptane, tetrahydro fluoronaphthalene or dimethylbenzene；
Polybutylene terephthalate: methylene chloride, tetrahydrofuran, chloroform or acetone；
Polyethylene terephthalate: methylene chloride, tetrahydrofuran, chloroform or acetone；
Polyarylate: methylene chloride, tetrahydrofuran, chloroform or acetone；
Polyvinyl acetate: toluene, acetone, ethyl alcohol, acetic acid, ethyl acetate or chloroform；
Nylon 6: formic acid；
Polyvinyl alcohol: water, ethyl alcohol, N,N-dimethylformamide or tetrahydrofuran；
Polymethyl methacrylate: chloroform, acetic acid, ethyl acetate, acetone or toluene；
Polyaniline: N,N-dimethylformamide or N-Methyl pyrrolidone；
Polyethylene glycol oxide: N,N-dimethylformamide, ethyl alcohol, water or chloroform；
Polyvinylpyrrolidone: water, ethyl alcohol, DMAC N,N' dimethyl acetamide or N,N-dimethylformamide；
Polyacrylonitrile: N,N-dimethylformamide or dimethyl sulfoxide；
Polycaprolactone: N,N-dimethylformamide or acetone；
Polyethylene glycol: water, ethyl alcohol or N,N-dimethylformamide；
Polyurethane: N,N-dimethylformamide, acetone or N-Methyl pyrrolidone；
Fluorinated polyurethane: N,N-dimethylformamide, acetone or N-Methyl pyrrolidone；
Polysulfones and polyether sulfone: N,N-dimethylformamide, acetone, N-Methyl pyrrolidone, dimethyl acetamide or tetrahydrofuran；
Kynoar-hexafluoropropene: N,N-dimethylformamide, N-Methyl pyrrolidone, dimethyl acetamide, tricresyl phosphate second
Ester or dimethyl sulfoxide；
Kynoar-tetrafluoroethylene-perfluoro methyl vinyl ether: N,N-dimethylformamide, N-Methyl pyrrolidone, diformazan
Yl acetamide, triethyl phosphate or dimethyl sulfoxide；
Kynoar-chlorotrifluoroethylene: N,N-dimethylformamide, N-Methyl pyrrolidone, dimethyl acetamide, tricresyl phosphate
Ethyl ester or dimethyl sulfoxide；
The mixture solvent for use of above-mentioned any two or three of polymer: all polymer can be dissolved in above-mentioned solvent simultaneously
The mixture of the solvent of single solvent or every kind of polymer；
Dissolved with the process for preparation of the liquid mixture of polymer are as follows: add a polymer in corresponding solvent, and stirred with magnetic force
It mixes device and continuously stirs 3~20h.
5. a kind of preparation method of the fresh air system according to claim 4 with electret nanofiber filtration material, feature
It is, at least one inorganic nanoparticles, the inorganic nanoparticles is dispersed in the liquid mixture dissolved with polymer
For silica, aluminum oxide, zinc oxide, barium monoxide, titanium dioxide, tantalum pentoxide, barium titanate, lead zirconate titanate, nitridation
Silicon, tourmaline, boehmite or silsesquioxane, the additive amount of inorganic nanoparticles are the liquid mixture dissolved with polymer
0.1~10wt%.
6. a kind of preparation method of the fresh air system according to claim 5 with electret nanofiber filtration material, feature
It is, described be quickly heating and curing is realized by installing temperature control device at 3~5cm above spinning nozzle, temperature control device
Temperature is 50~300 DEG C.
7. a kind of preparation method of the fresh air system according to claim 6 with electret nanofiber filtration material, feature
It is, the reception substrate is wood pulp cellulose substrate, fiber base material or mixed fiber base material；
The wood pulp cellulose filter paper or wood pulp cellulose non-woven cloth that the wood pulp cellulose substrate is, stiffness be 0.5~
5mNm, grammes per square metre are 8~400g/m2；Wood pulp cellulose filter paper is the corrugation filter paper that corrugation depth is 0.1~3mm；
The fiber base material is the filter paper or non-woven cloth of containing cellulose fiber, polyester fiber or polyolefine fiber, and stiffness is
0.5~5mNm, grammes per square metre are 6~350g/m2；Filter paper is corrugation filter paper, wherein the corrugation depth of cellulose fibre corrugation filter paper
For 0.1~3mm；
The mixed fiber base material is the mixing of the two or more compositions in cellulose fibre, polyester fiber and polyolefine fiber
The filter paper or non-woven cloth of fiber, stiffness are 0.5~5mNm, and grammes per square metre is 6~350g/m2, the filter paper of the composite fibre
For corrugation filter paper, wherein the corrugation depth of the corrugation filter paper of containing cellulose fiber is 0.1~3mm.
8. using fresh air system electret Nanofiber filter made from preparation method as described in any one of claims 1 to 7
Material, it is characterized in that: the fresh air system with electret nanofiber filtration material be fiber between without adhesion and fluffy three dimensional network
Shape interworking architecture, including substrate layer and layers of nanofibers；Substrate layer is porous wood pulp cellulose substrate, fiber base material or mixing
Fiber base material, fibre diameter be 10~50 μm, aperture size be 3~120 μm；The nanofiber diameter of layers of nanofibers is
0.5~0.8 μm, nanofiber grammes per square metre is 0.01~70g/m2, porosity of=80%；Fresh air system electret nanofiber
Filtering material Surface electrostatic potential is 1700~2300V, and 150 ° of hydrophobic angle >, the filter efficiency to 0.006~1 μm of particle is 50
~99.999%, pressure drag is less than 20Pa, and dust containing capacity is 50~3600g/m2, fresh air system electret Nanofiber filter material
It is undamped that material saves a month charge.
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| CN111249805A (en) * | 2020-02-28 | 2020-06-09 | 厦门理工学院 | A kind of electret nanofiber filter material and preparation method thereof |
| CN111495035A (en) * | 2020-02-28 | 2020-08-07 | 厦门理工学院 | A kind of electret nanofiber air filter material and preparation method thereof |
| CN111957109A (en) * | 2020-08-18 | 2020-11-20 | 绍兴市梓昂新材料有限公司 | Efficient organic-inorganic composite filter material |
| CN112301792A (en) * | 2020-06-30 | 2021-02-02 | 聚纳达(青岛)科技有限公司 | Novel industrial filter paper, preparation method and efficient production device |
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| CN112301792A (en) * | 2020-06-30 | 2021-02-02 | 聚纳达(青岛)科技有限公司 | Novel industrial filter paper, preparation method and efficient production device |
| CN111957109A (en) * | 2020-08-18 | 2020-11-20 | 绍兴市梓昂新材料有限公司 | Efficient organic-inorganic composite filter material |
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