CN106676752A - Preparation method of low-resistance composite air filter material - Google Patents
Preparation method of low-resistance composite air filter material Download PDFInfo
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- CN106676752A CN106676752A CN201610721569.6A CN201610721569A CN106676752A CN 106676752 A CN106676752 A CN 106676752A CN 201610721569 A CN201610721569 A CN 201610721569A CN 106676752 A CN106676752 A CN 106676752A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
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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
- B01D39/14—Other self-supporting filtering material ; Other filtering material
-
- 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
- D01F6/18—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 nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
-
- 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
- D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/38—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated nitriles as the major constituent
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/425—Cellulose series
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/43—Acrylonitrile series
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4374—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece using different kinds of webs, e.g. by layering webs
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
- D06M15/03—Polysaccharides or derivatives thereof
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
- D06M15/15—Proteins or derivatives thereof
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/26—Polymers or copolymers of unsaturated carboxylic acids or derivatives thereof
- D06M2101/28—Acrylonitrile; Methacrylonitrile
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Filtering Materials (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention discloses a preparation method of a low-resistance composite air filter material, and belongs to the field of filter materials. The method comprises the steps that firstly, bamboo fiber and China hemp fiber are mixed, then opened and carded into a bamboo fiber/China hemp fiber net through a carding machine after being opened, then, the bamboo fiber/China hemp fiber net is placed into a needling machine to be needled and fixed to obtain the composite fiber material, the composite fiber material is installed on the surface of a receiving plate of a spinning device to be spun, a polyacrylonitrile solution is sprayed on the surface of the composite fiber material, the composite fiber is placed into a mixed solution prepared through gelatin and carboxymethyl chitosan to be soaked after the two faces of the composite fiber are spun, and the composite fiber is taken out, hot-rolled and dried after being soaked to obtain the low-resistance composite air filter material. The obtained air filter material is high in filtering efficiency, small in filtering resistance, small in pore size and uniform in pore size distribution and good in air and water vapor permeability.
Description
Technical field
The invention discloses a kind of preparation method of low-resistance composite air filtering material, belongs to filtering material field..
Background technology
Filtering material is long-standing, and material includes real silk, thick fiber crops, glass fibre, non-weaving cloth, ceramics, porous metals material
, though these materials are with certain filter effect, there is filter efficiency is low, breathable moisture permeability is poor etc. in material, composite filtering material etc.
Shortcoming, can not meet requirement of the people to high-cleanness environment, and it is seriously polluted to add environment in recent years, and physics, biology, chemistry are dirty
Dye is increasingly serious, and common filtering material does not possess the ability of the tiny organisms such as isolation virus, and product heaviness, breathable moisture permeability
Difference, is gradually on the verge of to eliminate.Non-woven fabric electret material meets height by adding charged particle to make it possess electrostatic interception effect
Effect low-resistance is required, but it selects resolution high particulate matter, only possesses filtration efficiency, and solvent resistant, washing to charged particle
With placement poor performance, limit with certain application.
Filtration efficiency, the method for low filtration resistance nano fibrous membrane are prepared using composite membrane mode, including using layer by layer
Spinning mode, such as spins one layer of PA6 nanofiber on PET micron electrostatic spinning fiber films surface, spins different closeness composite membranes；Static Spinning
Fiber-non-weaving cloth composite algorithm, research is respectively adopted three kinds of non-weaving cloths for base fabric nanocrystal monolayer, micron individual layer and nanometer/micro-
The strainability of rice multilayer materials；Electrostatic spinning fiber-fabric composite algorithm, research PA6 nano fibrous membranes are deposited on nylon/cotton
Compound membrane filtration characteristic prepared by fabric, research shows that electrostatic spinning fiber-fabric composite algorithm filter efficiency, up to 99%, crosses filtration resistance
Power is about 300~500Pa.
At present with regard to the existing numerous studies of nano fibrous membrane industrialization production, but performance deficiency is there is, such as diameter distribution
Scope is big, the low, filtration resistance of strength is big etc., makes properties of product variation, range of application narrow, therefore Nanofiber filter film product
And unrealized industrialization.Nanometer film with filtration efficiency is one of application of nanofiber, how to use and researches and develops
Industrialization instrument development go out efficient low-resistance, the nanometer product of excellent performance becomes study hotspot.
The content of the invention
Present invention mainly solves technical problem：For current filtering material filter efficiency it is low, breathable moisture permeability is poor, strong
Power is low, filtration resistance is big etc., makes the defect that properties of product are deteriorated, range of application narrows, there is provided a kind of low-resistance composite air mistake
The preparation method of filter material material.The present invention is combed after shredding first with shredding is carried out after bamboo fibre and china-hemp fibers mixing with carding machine
Bamboo fibre/china-hemp fibers net is managed into, in placing into needing machine, acupuncture consolidation obtains complex fiber material, is mounted to spinning dress
The reception plate surface put, and spun polypropylene nitrile solution will put on complex fiber material surface after all spinning of composite fibre two sides
Enter in mixed liquor prepared by gelatin and carboxymethyl chitosan and soak, taking-up, hot rolling, drying after immersion, you can prepare low-resistance
Composite air filtering material, the filtering material that the present invention is prepared, filter efficiency is high, and filtration resistance is little, the hole of filtering material
Footpath size and even aperture distribution, breathable moisture permeability is good.
In order to solve above-mentioned technical problem, the technical solution adopted in the present invention is：
（1）10~15g bamboo fibres and 8~10g china-hemp fibers are weighed respectively, respectively with mixing after double roller opener and must mix
Fiber, composite fibre is carried out again shredding, and mixing in the composite fibre feeding carding machine after shredding is carded into net, obtains bamboo fine
It is input into after dimension/china-hemp fibers net in needing machine, in bestock be 1000~1200 pieces/m and machine speed is 150~200r/min bars
Acupuncture consolidation, obtains complex fiber material under part；
（2）Weigh 20~30g polyacrylonitrile and be added to 120~150mL by dichloromethane and hexafluoroisopropanol by volume 6:1 mixes
In the mixed solvent of conjunction, stirring mixes to solid and is completely dissolved, and is prepared into polyacrylonitrile solution, and loads the injection of device for spinning
In device, syringe needle is connected with the positive pole of high pressure generator, by above-mentioned complex fiber material loaded in reception device, reception device with
The distance of syringe needle is 15~18cm, and spinning voltage is 25~30kV, and spinning solution flow is 0.5~0.7mL/min, and spinning solution is direct
Spinning after spinning terminates, changes the another side of complex fiber material in complex fiber material surface, 5~6h of spinning, continues spinning 5
~6h, obtains filtering material after spinning, standby；
（3）Weigh 20~30g gelatin to be put into 500mL flasks, 200~220mL deionized waters are added, after 15~20min of stirring
Stand 6~8h, after standing add 10~15g carboxymethyl chitosans, under 120~150r/min speed conditions stirring mixing 2~
4h, obtains mixed liquor after mixing；
（4）By step（2）Standby filtering material is immersed in above-mentioned mixed liquor, is taken out after 3~5h of immersion, will be filtered after immersion
Material 10~15min of hot rolling treatment under the conditions of 150~160 DEG C, is put into baking oven after hot rolling treatment, under the conditions of 60~70 DEG C
8~10h is dried, low-resistance composite air filtering material is obtained after being dried.
The filtration resistance of the air filting material that the present invention is prepared is below 360pa, and gas permeability is 340~450L
m-2·s-1, penetrability is 6.0~9.6m2Pa/w, filtering material filter efficiency is big for PM1~PM3 grade micronic dust stop rates
In 99.95%.
The invention has the beneficial effects as follows：
（1）The filtering material pore-size distribution that the present invention is prepared is narrow, and pore size is uniform；
（2）The filtering material filter efficiency that the present invention is prepared is high, for PM1~PM3 grade micronic dust stop rates are more than
99.95%, filtration resistance is low, and mechanics strength is high；
（3）The porosity of filtering material of the present invention is high, breathable moisture permeability is good, and gas permeability is 340~450Lm-2·s-1, moisture-inhibiting
Property be 6.0~9.6m2·Pa/w。
Specific embodiment
10~15g bamboo fibres and 8~10g china-hemp fibers are weighed respectively, are mixed with after double roller opener respectively, will be mixed
Condensating fiber carries out again shredding, mixing in the composite fibre feeding carding machine after shredding is carded into net, by bamboo fibre/china-hemp fibers
In net input needing machine, acupuncture under conditions of being 150~200r/min for 1000~1200 pieces/m and machine speed in bestock is consolidated
Knot, obtains complex fiber material；Weigh 20~30g polyacrylonitrile be added to 120~150mL by dichloromethane and hexafluoroisopropanol by
Volume ratio 6:In the mixed solvent of 1 mixing, stirring mixes to solid and is completely dissolved, and is prepared into polyacrylonitrile solution, and loads spinning
In the syringe of silk device, syringe needle is connected with the positive pole of high pressure generator, above-mentioned complex fiber material is loaded on into reception device
On, reception device is 15~18cm with the distance of syringe needle, and spinning voltage is 25~30kV, and spinning solution flow is 0.5~0.7mL/
Min, spinning solution direct fabrics after spinning terminates, change the another of complex fiber material in complex fiber material surface, 5~6h of spinning
Simultaneously, continue 5~6h of spinning, filtering material is obtained after spinning, it is standby；Weigh 20~30g gelatin to be put into 500mL flasks, add
200~220mL deionized waters, after 15~20min of stirring 6~8h is stood, and 10~15g carboxymethyl chitosans are added after standing,
120~150r/min rotating speeds stirring 2~4h of mixing, obtains mixed liquor after mixing；Standby filtering material is immersed in into above-mentioned mixing
In liquid, take out after 3~5h of immersion, 10~15min of hot rolling treatment, the hot rolling under the conditions of 150~160 DEG C by filtering material after immersion
It is put into after process in baking oven, 8~10h is dried under the conditions of 60~70 DEG C, low-resistance composite air filtering material is obtained after being dried
Material.Example 1
10g bamboo fibres and 8g china-hemp fibers being weighed respectively, being mixed with after double roller opener respectively, composite fibre is carried out again
Shredding, by mixing in the composite fibre feeding carding machine after shredding net is carded to, by bamboo fibre/china-hemp fibers net input needing machine
In, acupuncture consolidation under conditions of being 150r/min for 1000 pieces/m and machine speed in bestock obtains complex fiber material；Weigh
20g polyacrylonitrile is added to 120mL by dichloromethane and hexafluoroisopropanol by volume 6:In the mixed solvent of 1 mixing, stirring
Mix to solid and be completely dissolved, be prepared into polyacrylonitrile solution, and be fitted into the syringe of device for spinning, by syringe needle and high pressure
The positive pole of raw device is connected, and by above-mentioned complex fiber material loaded in reception device, reception device is 15cm with the distance of syringe needle, is spun
Filament voltage is 25kV, and spinning solution flow is 0.5mL/min, and spinning solution direct fabrics spin in complex fiber material surface, spinning 5h
After silk terminates, the another side of complex fiber material is changed, continue spinning 5h, filtering material is obtained after spinning, it is standby；Weigh 20g gelatin
In being put into 500mL flasks, 200mL deionized waters are added, after stirring 15min 6h is stood, 10g carboxymethyl chitosans are added after standing
Sugar, in 120r/min rotating speeds stirring mixing 2h, obtains mixed liquor after mixing；Standby filtering material is immersed in into above-mentioned mixed liquor
In, immersion 3h after take out, by filtering material after immersion under the conditions of 150 DEG C hot rolling treatment 10min, baking oven is put into after hot rolling treatment
In, 8h is dried under the conditions of 60 DEG C, low-resistance composite air filtering material is obtained after being dried.
The filtration resistance of the air filting material that the present invention is prepared is 350pa, and gas permeability is 340Lm-2·s-1,
Penetrability is 6.0m2Pa/w, filtering material filter efficiency is for PM1 grade micronic dust stops rate 99.96%.
Example 2
13g bamboo fibres and 9g china-hemp fibers being weighed respectively, being mixed with after double roller opener respectively, composite fibre is carried out again
Shredding, by mixing in the composite fibre feeding carding machine after shredding net is carded to, by bamboo fibre/china-hemp fibers net input needing machine
In, acupuncture consolidation under conditions of being 175r/min for 1100 pieces/m and machine speed in bestock obtains complex fiber material；Weigh
25g polyacrylonitrile is added to 135mL by dichloromethane and hexafluoroisopropanol by volume 6:In the mixed solvent of 1 mixing, stirring
Mix to solid and be completely dissolved, be prepared into polyacrylonitrile solution, and be fitted into the syringe of device for spinning, by syringe needle and high pressure
The positive pole of raw device is connected, and by above-mentioned complex fiber material loaded in reception device, reception device is 16cm with the distance of syringe needle, is spun
Filament voltage is 27kV, and spinning solution flow is 0.6mL/min, spinning solution direct fabrics on complex fiber material surface, spinning 5.5h,
After spinning terminates, the another side of complex fiber material is changed, continue spinning 5.5h, filtering material is obtained after spinning, it is standby；Weigh 25g
Gelatin is put into 500mL flasks, adds 210mL deionized waters, and after stirring 17min 7h is stood, and 13g carboxymethyl shells are added after standing
Glycan, in 135r/min rotating speeds stirring mixing 3h, obtains mixed liquor after mixing；Standby filtering material is immersed in into above-mentioned mixed liquor
In, immersion 4h after take out, by filtering material after immersion under the conditions of 155 DEG C hot rolling treatment 13min, baking oven is put into after hot rolling treatment
In, 9h is dried under the conditions of 65 DEG C, low-resistance composite air filtering material is obtained after being dried.
The filtration resistance of the air filting material that the present invention is prepared is 320pa, and gas permeability is 400Lm-2·s-1,
Penetrability is 8.2m2Pa/w, filtering material filter efficiency is more than 99.98% for PM2.5 grade micronic dust stops rate.
Example 3
15g bamboo fibres and 10g china-hemp fibers being weighed respectively, being mixed with after double roller opener respectively, composite fibre is entered again
Row shredding, by mixing in the composite fibre feeding carding machine after shredding net is carded to, by bamboo fibre/china-hemp fibers net input acupuncture
In machine, acupuncture consolidation under conditions of being 200r/min for 1200 pieces/m and machine speed in bestock obtains complex fiber material；Weigh
30g polyacrylonitrile is added to 150mL by dichloromethane and hexafluoroisopropanol by volume 6:In the mixed solvent of 1 mixing, stirring
Mix to solid and be completely dissolved, be prepared into polyacrylonitrile solution, and be fitted into the syringe of device for spinning, by syringe needle and high pressure
The positive pole of raw device is connected, and by above-mentioned complex fiber material loaded in reception device, reception device is 18cm with the distance of syringe needle, is spun
Filament voltage is 30kV, and spinning solution flow is 0.7mL/min, and spinning solution direct fabrics spin in complex fiber material surface, spinning 6h
After silk terminates, the another side of complex fiber material is changed, continue spinning 6h, filtering material is obtained after spinning, it is standby；Weigh 30g gelatin
In being put into 500mL flasks, 220mL deionized waters are added, after stirring 20min 8h is stood, 15g carboxymethyl chitosans are added after standing
Sugar, in 150r/min rotating speeds stirring mixing 4h, obtains mixed liquor after mixing；Standby filtering material is immersed in into above-mentioned mixed liquor
In, immersion 5h after take out, by filtering material after immersion under the conditions of 160 DEG C hot rolling treatment 15min, baking oven is put into after hot rolling treatment
In, 10h is dried under the conditions of 70 DEG C, low-resistance composite air filtering material is obtained after being dried.
The filtration resistance of the air filting material that the present invention is prepared is 320pa, and gas permeability is 450Lm-2·s-1,
Penetrability is 9.6m2Pa/w, filtering material filter efficiency is for PM3 grade micronic dust stops rate 99.99%.
Claims (1)
1. a kind of preparation method of low-resistance composite air filtering material, it is characterised in that concrete preparation process is；
（1）10~15g bamboo fibres and 8~10g china-hemp fibers are weighed respectively, respectively with mixing after double roller opener and must mix
Fiber, composite fibre is carried out again shredding, and mixing in the composite fibre feeding carding machine after shredding is carded into net, obtains bamboo fine
It is input into after dimension/china-hemp fibers net in needing machine, in bestock be 1000~1200 pieces/m and machine speed is 150~200r/min bars
Acupuncture consolidation, obtains complex fiber material under part；
（2）Weigh 20~30g polyacrylonitrile and be added to 120~150mL by dichloromethane and hexafluoroisopropanol by volume 6:1 mixes
In the mixed solvent of conjunction, stirring mixes to solid and is completely dissolved, and is prepared into polyacrylonitrile solution, and loads the injection of device for spinning
In device, syringe needle is connected with the positive pole of high pressure generator, by above-mentioned complex fiber material loaded in reception device, reception device with
The distance of syringe needle is 15~18cm, and spinning voltage is 25~30kV, and spinning solution flow is 0.5~0.7mL/min, and spinning solution is direct
Spinning after spinning terminates, changes the another side of complex fiber material in complex fiber material surface, 5~6h of spinning, continues spinning 5
~6h, obtains filtering material after spinning, standby；
（3）Weigh 20~30g gelatin to be put into 500mL flasks, 200~220mL deionized waters are added, after 15~20min of stirring
Stand 6~8h, after standing add 10~15g carboxymethyl chitosans, under 120~150r/min speed conditions stirring mixing 2~
4h, obtains mixed liquor after mixing；
（4）By step（2）Standby filtering material is immersed in above-mentioned mixed liquor, is taken out after 3~5h of immersion, will be filtered after immersion
Material 10~15min of hot rolling treatment under the conditions of 150~160 DEG C, is put into baking oven after hot rolling treatment, under the conditions of 60~70 DEG C
8~10h is dried, low-resistance composite air filtering material is obtained after being dried.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108342834A (en) * | 2018-02-28 | 2018-07-31 | 中国林业科学研究院木材工业研究所 | A kind of flexible interpenetrating networks porous material and preparation method can be used for molding |
| CN110181894A (en) * | 2019-06-03 | 2019-08-30 | 湖南瑞亚高科集团有限公司 | A kind of air conditioner filter element |
| CN112195562A (en) * | 2020-09-25 | 2021-01-08 | 邹昊谚 | Non-woven fabric processing method |
| CN113164846A (en) * | 2018-11-30 | 2021-07-23 | 霍林斯沃思和沃斯有限公司 | Filter media with fine pore size distribution |
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