CN108465297A - A kind of preparation method of super-hydrophobic electret filter for air purification - Google Patents
A kind of preparation method of super-hydrophobic electret filter for air purification Download PDFInfo
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- CN108465297A CN108465297A CN201810192704.1A CN201810192704A CN108465297A CN 108465297 A CN108465297 A CN 108465297A CN 201810192704 A CN201810192704 A CN 201810192704A CN 108465297 A CN108465297 A CN 108465297A
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- cleaning function
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- 230000003075 superhydrophobic effect Effects 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000004887 air purification Methods 0.000 title description 5
- 239000000463 material Substances 0.000 claims abstract description 90
- 239000002131 composite material Substances 0.000 claims abstract description 65
- 238000001914 filtration Methods 0.000 claims abstract description 62
- 239000000835 fiber Substances 0.000 claims abstract description 53
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229940072056 alginate Drugs 0.000 claims abstract description 37
- 235000010443 alginic acid Nutrition 0.000 claims abstract description 37
- 229920000615 alginic acid Polymers 0.000 claims abstract description 37
- 238000004140 cleaning Methods 0.000 claims abstract description 33
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 28
- 239000012528 membrane Substances 0.000 claims abstract description 24
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 20
- 230000004048 modification Effects 0.000 claims abstract description 19
- 238000012986 modification Methods 0.000 claims abstract description 19
- 239000002121 nanofiber Substances 0.000 claims abstract description 18
- 239000000126 substance Substances 0.000 claims abstract description 12
- 238000002203 pretreatment Methods 0.000 claims abstract description 8
- 239000006185 dispersion Substances 0.000 claims description 43
- 239000007788 liquid Substances 0.000 claims description 41
- 239000000243 solution Substances 0.000 claims description 41
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 33
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 21
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 19
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 18
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical class CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 17
- 235000019441 ethanol Nutrition 0.000 claims description 17
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 14
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 14
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 14
- 230000008021 deposition Effects 0.000 claims description 13
- 239000002904 solvent Substances 0.000 claims description 13
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 12
- 229920000642 polymer Polymers 0.000 claims description 10
- 239000012046 mixed solvent Substances 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- RSKGMYDENCAJEN-UHFFFAOYSA-N hexadecyl(trimethoxy)silane Chemical compound CCCCCCCCCCCCCCCC[Si](OC)(OC)OC RSKGMYDENCAJEN-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000004408 titanium dioxide Substances 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 6
- 239000004800 polyvinyl chloride Substances 0.000 claims description 6
- -1 silicane alkane Chemical class 0.000 claims description 6
- 235000021355 Stearic acid Nutrition 0.000 claims description 5
- 239000002105 nanoparticle Substances 0.000 claims description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 5
- 239000008117 stearic acid Substances 0.000 claims description 5
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 210000004508 polar body Anatomy 0.000 claims description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 3
- 239000004425 Makrolon Substances 0.000 claims description 2
- 240000007594 Oryza sativa Species 0.000 claims description 2
- 235000007164 Oryza sativa Nutrition 0.000 claims description 2
- 239000004697 Polyetherimide Substances 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 2
- 229910002113 barium titanate Inorganic materials 0.000 claims description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 229920001601 polyetherimide Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 235000009566 rice Nutrition 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 2
- 239000005052 trichlorosilane Substances 0.000 claims description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims 1
- 229940070527 tourmaline Drugs 0.000 claims 1
- 229910052613 tourmaline Inorganic materials 0.000 claims 1
- 239000011032 tourmaline Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 5
- 238000001523 electrospinning Methods 0.000 abstract description 3
- 239000000706 filtrate Substances 0.000 abstract description 3
- 239000002114 nanocomposite Substances 0.000 abstract description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 description 10
- MTZOKGSUOABQEO-UHFFFAOYSA-L barium(2+);phthalate Chemical compound [Ba+2].[O-]C(=O)C1=CC=CC=C1C([O-])=O MTZOKGSUOABQEO-UHFFFAOYSA-L 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 230000009931 harmful effect Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000009987 spinning Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000005543 nano-size silicon particle Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N Butyraldehyde Chemical compound CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005516 deep trap Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000013327 media filtration Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 150000004040 pyrrolidinones Chemical class 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0028—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions provided with antibacterial or antifungal means
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
Abstract
The present invention provides a kind of preparation method of the super-hydrophobic electret with air-cleaning function, includes the following steps：Step 1)：Spun-bonded non-woven fabrics pre-treatment；Step 2)：Composite superfine nanometer alginate fibre；Step 3)：Electrostatic spinning；Step 4)：Low-surface energy substance surface modification is superimposed with composite filtering material and polytetrafluoroethylporous porous membrane.The present invention deposits high-flexibility, superfine nano fiber and composite superfine nanometer alginate fibre by the composition fiber surface in composite filtering material, electrospinning processing is carried out to composite filtering material again, keep charge in filtrate uniform, stable, super-hydrophobic processing is carried out to composite filtering material later, by low-surface energy substance to the surface modification of composite filtering material and polytetrafluoroethylporous porous membrane, make composite filtering material and polytetrafluoroethylporous porous membrane that there is super-hydrophobicity, composite filtering material and polytetrafluoroethylporous porous membrane are superimposed again, you can obtain the excellent electret of strainability.
Description
Technical field
The invention belongs to material for air purification technical fields, and in particular to a kind of that there is the super-hydrophobic of air-cleaning function to stay
The preparation method of polar body.
Background technology
With progress of the epoch, requirement of the people to environmental quality is higher and higher.But economic fast development exacerbates ring
The pollution in border, dust, chemical substance, harmful microorganism etc. in air produce harmful effect to people's health.Therefore, have
Harmful substance in effect control air is that have significant problem to be solved.
The application of air filter and filtering material is to purify the important means of air.Normal air filtering material is for thin
The removal of little particulate is not thorough enough, and is easy to multiply harmful microorganism on filtering material, and there are the possibility of secondary pollution.And it stays
Polar body air filting material provides possibility to solve this problem.By carrying out electrostatic electret processing to air filting material,
Make in material can standby storage space charge and dipole charge, trap the performances such as grit using the electrostatic force of charge, make
Electret air filtering material has many advantages, such as efficient, low-resistance, energy saving.But existing electret air filtering material charge is deposited
Store up that performance is general, and performance is not sufficiently stable, and charge is easily decayed, the characteristic parameter of this and electret air filtering material has very high point
System, including the thickness of the molecular structure of the surface texture of material, material, material and filler etc..
Common electrostatic electret method has corona discharge, electrostatic spinning and thermal poling etc., wherein electrostatic spinning to utilize high pressure
Electricity injects a large amount of space charges in fiber in spinning process, and space charge is easily captured by the deep trap of fibrous inside, simultaneously
It can induce dipole polarization and generate polarization charge, and then electret filter material is made.But electret filter material use and
During storage, since moisture present in air and particle etc. are in direct contact with electret so that in electret material
Surface charge loss is accelerated, and to make the decaying of electret effect become faster, it is unstable to eventually lead to media filtration efficiency.
Invention content
Based on the above prior art, the purpose of the present invention is to provide a kind of super-hydrophobic electrets with air-cleaning function
The preparation method of body deposits high-flexibility, superfine nano fiber and composite superfine by the composition fiber surface in composite filtering material
Nanometer alginate fibre, then electrospinning processing is carried out to composite filtering material, keep charge in filtrate uniform, stable, later to composite filter
Material and polytetrafluoroethylporous porous membrane are modified by low-surface energy substance, so that composite filtering material and polytetrafluoroethylporous porous membrane is had super thin
It is aqueous, then composite filtering material and polytetrafluoroethylporous porous membrane are superimposed, you can obtain the excellent electret of strainability.
In order to achieve the goal above, the technical solution adopted by the present invention is：It is a kind of super-hydrophobic with air-cleaning function
The preparation method of electret, includes the following steps：
Step 1)：Spun-bonded non-woven fabrics pre-treatment
Step 1.1)：Titanium dioxide nanofiber or nanometer activated carbon fiber are added in ethyl alcohol, and ultrasonic disperse, are obtained
Uniform dispersion liquid；
Step 1.2)：Spun-bonded non-woven fabrics are impregnated in the dispersion liquid of titanium dioxide nanofiber or nanometer activated carbon fiber
Drying is taken out afterwards, and the spun-bonded non-woven fabrics base material of surface deposition of titanium oxide nanofiber or nanometer activated carbon fiber is made；
Step 2)：Composite superfine nanometer alginate fibre
Step 2.1)：Polyvinyl butyral solution is first prepared, high speed then is added in itself and superfine nano alginate fibre
Disperseed in beater, obtains uniform superfine nano alginate fibre dispersion liquid；
Step 2.2)：Spun-bonded non-woven fabrics base material made from step 1) is soaked in the superfine nano alginate fibre dispersion liquid
It takes out, dries after bubble, obtain the composite filtering material of fiber surface deposition superfine nano alginate fibre；
Step 3)：Electrostatic spinning
Step 3.1)：Inorganic electret nano-particle is added in solvent, ultrasonic vibration is uniformly dispersed, and obtains inorganic electret
The evenly dispersed dispersion liquid of body nano-particle；
Step 3.2)：Polymer is added in the dispersion liquid, stirring and dissolving is uniform, is configured to polymer solution；
Step 3.3)：Polymer solution is prepared in by electrostatic spinning on composite filtering material made from step 2), is obtained
The composite filtering material of even deposited polymer nanofiber；
Step 4)：Surface modification and overlapping
Step 4.1)：Low-surface energy substance is dissolved in solvent, low-surface-energy solution is obtained；
Step 4.2)：Composite filtering material surface obtained by low-surface-energy solution spraying to step 3) is surface modified；
Step 4.3)：Polytetrafluoroethylporous porous membrane is impregnated in after being impregnated in low-surface-energy solution and is taken out, dried；
Step 4.4)：Composite filtering material after modification and polytetrafluoroethylene (PTFE) prepared by step 4.2) and step 4.3) is more
Pore membrane is superimposed, and the super-hydrophobic electret with air-cleaning function is made.
Further, the inorganic electret nano-particle is silica, titanium dioxide, barium titanate, silicon nitride or electricity
Gas stone.
Further, solvent is N-N dimethylformamides, butanone, tetrahydrofuran, dichloromethane and first in the step 3)
The mixing of one or more of base pyrrolidones.
Further, correspondence is as follows respectively for the polymer and solvent：
Kynoar：N-N dimethylformamides and butanone mass ratio are 1:1 mixed solvent；
Polyvinyl chloride：N-N dimethylformamides and tetrahydrofuran mass ratio are 1:1 mixed solvent；
Polyacrylonitrile：N-N dimethylformamides；
Makrolon：Dichloromethane；
Polyetherimide：N-N dimethylformamides and methyl pyrrolidone mass ratio are 1:1 mixed solvent；
Polystyrene：N-N dimethylformamides and tetrahydrofuran mass ratio are 3:1 mixed solvent；
Polyurethane：Butanone.
Further, the process conditions of electrostatic spinning are in the step 3)：Voltage 10-30KV receives distance 5-25cm,
Injection speed 1-5m L/h, 0-35 DEG C of temperature, relative humidity 0-70%.
Further, low-surface energy substance described in the step 4) be stearic acid, hexadecyl trimethoxy silane,
1H, 1H, 2H, 2H- perfluoroalkyl triethoxysilane or 1H, 1H, 2H, 2H- perfluoroalkyl trichlorosilanes；The solvent is nail
Alcohol or ethyl alcohol.
Further, correspondence is as follows respectively for the low-surface energy substance and solvent：
Stearic acid：Ethyl alcohol；
Hexadecyl trimethoxy silane：Methanol；
1H, 1H, 2H, 2H- perfluoroalkyl triethoxysilane：Ethyl alcohol；
1H, 1H, 2H, 2H- perfluoroalkyl trichlorosilane：Ethyl alcohol.
As obtained by the preparation method of the above-mentioned super-hydrophobic electret with air-cleaning function with air purification
The super-hydrophobic electret of function, the superposition number of plies are 2-10 layers.
As obtained by the preparation method of the above-mentioned super-hydrophobic electret with air-cleaning function with air purification
The super-hydrophobic electret of function, which is characterized in that 0.02~10 μm of the super-hydrophobic electret pair with air-cleaning function
Particle filter efficiency up to 99.999% or more.
Compared with prior art, the invention has the advantages that：
High-flexibility, superfine nano fiber are deposited by the composition fiber surface in composite filtering material, is formed on main fibre
Lamination material containing " dividing shape secondary structure ", main body crude fibre there is preferable filtering to imitate the larger particle of grain size
Fruit is formed simultaneously larger aperture structure and is conducive to passing through for air-flow, and two level fractal structure have for ultra-fine grain it is excellent
Different strainability, while its more soft characteristic so that have high-speed flow by when will not generate barrier effect to air-flow,
To which the increase of resistance pressure drop will not be caused.
In filter material surface composite superfine nanometer alginate fibre, adhesive is used as by polyvinyl butyral solution, it is ultra-fine
Nanometer alginate fibre is adhered to the composition fiber surface of composite filtering material, and superfine nano alginate fibre can generate anion, and sea
Algae fiber, which contains minerals, can release α waves, make popular feeling border loose and have comfort；In addition, polyethanol butyral is with hydrophobic
Property, it can assign composite filtering material certain hydrophobic to that can be formed in composite filtering material composition fiber surface after composite filtering material immersion treatment
Property.
Electrospinning processing is carried out to composite filtering material, make in filtrate charge uniformly, stablize, composite filtering material is surpassed later
Hydrophobic treatment.By low-surface energy substance to the surface modification of composite filtering material and polytetrafluoroethylporous porous membrane, make composite filtering material and
Polytetrafluoroethylporous porous membrane has super-hydrophobicity, then composite filtering material and polytetrafluoroethylporous porous membrane are superimposed, you can enhancing is stayed
The sterilization of electret material, strainability.
Description of the drawings
Fig. 1 is the super-hydrophobic electret structural schematic diagram with air-cleaning function prepared by the embodiment of the present invention 1；
Wherein：1 is the composite filtering material after modification, and 2 be polytetrafluoroethylporous porous membrane.
Specific implementation mode
With reference to specific embodiment, invention is further described in detail.
Embodiment 1
A kind of preparation method of the super-hydrophobic electret with air-cleaning function, includes the following steps：
Step 1)：Spun-bonded non-woven fabrics pre-treatment
Step 1.1)：Titanium dioxide nanofiber is added in ethyl alcohol, and ultrasonic disperse, obtains uniform dispersion liquid；
Step 1.2)：Drying is taken out after spun-bonded non-woven fabrics are impregnated in the dispersion liquid of titanium dioxide nanofiber, is made
The spun-bonded non-woven fabrics base material of surface deposition of titanium oxide nanofiber；
Step 2)：Composite superfine nanometer alginate fibre
Step 2.1)：Polyvinyl butyral solution is first prepared, high speed then is added in itself and superfine nano alginate fibre
Disperseed in beater, obtains uniform superfine nano alginate fibre dispersion liquid；
Step 2.2)：Spun-bonded non-woven fabrics base material made from step 1) is soaked in the superfine nano alginate fibre dispersion liquid
It takes out, dries after bubble, obtain the composite filtering material of fiber surface deposition superfine nano alginate fibre；
Step 3)：Electrostatic spinning
Step 3.1)：It is 1 that N-N dimethylformamides and butanone mass ratio, which is added, in nano-silicon dioxide particle:1 mixing
In solvent, ultrasonic vibration is uniformly dispersed, and obtains the evenly dispersed dispersion liquid of nano-silicon dioxide particle；
Step 3.2)：Kynoar is added in the dispersion liquid, stirring and dissolving is uniform, and it is molten to be configured to Kynoar
Liquid；
Step 3.3)：Kynoar solution is prepared in by electrostatic spinning on composite filtering material made from step 2), it is quiet
The process conditions of Electrospun are：Voltage 20KV receives distance 15cm, injection speed 2m L/h, 20 DEG C of temperature, relative humidity 40%
It is obtain a homogeneously deposited the composite filtering material of polyvinylidene fluoride nanometer fiber；
Step 4)：Surface modification and overlapping
Step 4.1)：Stearic acid is dissolved in ethyl alcohol, low-surface-energy solution is obtained；
Step 4.2)：Composite filtering material surface obtained by low-surface-energy solution spraying to step 3) is surface modified；
Step 4.3)：Polytetrafluoroethylporous porous membrane is impregnated in after being impregnated in low-surface-energy solution and is taken out, dried；
Step 4.4)：Composite filtering material 1 and polytetrafluoroethylene (PTFE) after modification prepared by step 4.2) and step 4.3)
Perforated membrane 2 is superimposed, as shown in Figure 1, the super-hydrophobic electret with air-cleaning function that the number of plies is 10 layers is made.
Embodiment 2
A kind of preparation method of the super-hydrophobic electret with air-cleaning function, includes the following steps：
Step 1)：Spun-bonded non-woven fabrics pre-treatment
Step 1.1)：Nanometer activated carbon fiber is added in ethyl alcohol, and ultrasonic disperse, obtains uniform dispersion liquid；
Step 1.2)：Drying is taken out after spun-bonded non-woven fabrics are impregnated in the dispersion liquid of nanometer activated carbon fiber, and table is made
Face deposits the spun-bonded non-woven fabrics base material of nanometer activated carbon fiber；
Step 2)：Composite superfine nanometer alginate fibre
Step 2.1)：Polyvinyl butyral solution is first prepared, high speed then is added in itself and superfine nano alginate fibre
Disperseed in beater, obtains uniform superfine nano alginate fibre dispersion liquid；
Step 2.2)：Spun-bonded non-woven fabrics base material made from step 1) is soaked in the superfine nano alginate fibre dispersion liquid
It takes out, dries after bubble, obtain the composite filtering material of fiber surface deposition superfine nano alginate fibre；
Step 3)：Electrostatic spinning
Step 3.1)：It is 1 that N-N dimethylformamides and tetrahydrofuran mass ratio, which is added, in nano-titania particle:1
In the mixed solvent, ultrasonic vibration are uniformly dispersed, and obtain the evenly dispersed dispersion liquid of nano-titania particle；
Step 3.2)：Polyvinyl chloride is added in the dispersion liquid, stirring and dissolving is uniform, is configured to polyvinyl chloride solution；
Step 3.3)：Polyvinyl chloride solution is prepared in by electrostatic spinning on composite filtering material made from step 2), electrostatic
The process conditions of spinning are：Voltage 30KV receives distance 25cm, and injection speed 5m L/h, 20 DEG C of temperature, relative humidity 40% must
To the composite filtering material of uniform deposition polyvinyl chloride nano fiber；
Step 4)：Surface modification and overlapping
Step 4.1)：Hexadecyl trimethoxy silane is dissolved in methanol, low-surface-energy solution is obtained；
Step 4.2)：Composite filtering material surface obtained by low-surface-energy solution spraying to step 3) is surface modified；
Step 4.3)：Polytetrafluoroethylporous porous membrane is impregnated in after being impregnated in low-surface-energy solution and is taken out, dried；
Step 4.4)：Composite filtering material after modification and polytetrafluoroethylene (PTFE) prepared by step 4.2) and step 4.3) is more
Pore membrane is superimposed, and the super-hydrophobic electret with air-cleaning function that the number of plies is 10 layers is made.
Embodiment 3
A kind of preparation method of the super-hydrophobic electret with air-cleaning function, includes the following steps：
Step 1)：Spun-bonded non-woven fabrics pre-treatment
Step 1.1)：Nanometer activated carbon fiber is added in ethyl alcohol, and ultrasonic disperse, obtains uniform dispersion liquid；
Step 1.2)：Drying is taken out after spun-bonded non-woven fabrics are impregnated in the dispersion liquid of nanometer activated carbon fiber, and table is made
Face deposits the spun-bonded non-woven fabrics base material of nanometer activated carbon fiber；
Step 2)：Composite superfine nanometer alginate fibre
Step 2.1)：Polyvinyl butyral solution is first prepared, high speed then is added in itself and superfine nano alginate fibre
Disperseed in beater, obtains uniform superfine nano alginate fibre dispersion liquid；
Step 2.2)：Spun-bonded non-woven fabrics base material made from step 1) is soaked in the superfine nano alginate fibre dispersion liquid
It takes out, dries after bubble, obtain the composite filtering material of fiber surface deposition superfine nano alginate fibre；
Step 3)：Electrostatic spinning
Step 3.1)：Nano barium phthalate particle is added in N-N dimethylformamides, ultrasonic vibration is uniformly dispersed, and obtains
The dispersion liquid of nano barium phthalate uniform particle dispersion；
Step 3.2)：Polyacrylonitrile is added in the dispersion liquid, stirring and dissolving is uniform, is configured to polyacrylonitrile solution；
Step 3.3)：Polyacrylonitrile solution is prepared in by electrostatic spinning on composite filtering material made from step 2), electrostatic
The process conditions of spinning are：Voltage 30KV receives distance 25cm, and injection speed 5m L/h, 25 DEG C of temperature, relative humidity 50% must
To the composite filtering material of uniform deposition polyacrylonitrile nanofiber；
Step 4)：Surface modification and overlapping
Step 4.1)：Hexadecyl trimethoxy silane is dissolved in methanol, low-surface-energy solution is obtained；
Step 4.2)：Composite filtering material surface obtained by low-surface-energy solution spraying to step 3) is surface modified；
Step 4.3)：Polytetrafluoroethylporous porous membrane is impregnated in after being impregnated in low-surface-energy solution and is taken out, dried；
Step 4.4)：Composite filtering material after modification and polytetrafluoroethylene (PTFE) prepared by step 4.2) and step 4.3) is more
Pore membrane is superimposed, and the super-hydrophobic electret with air-cleaning function that the number of plies is 10 layers is made.
Comparative example 1
A kind of preparation method of the super-hydrophobic electret with air-cleaning function, includes the following steps：
Step 1)：Spun-bonded non-woven fabrics pre-treatment
Step 1.1)：Nanometer activated carbon fiber is added in ethyl alcohol, and ultrasonic disperse, obtains uniform dispersion liquid；
Step 1.2)：Drying is taken out after spun-bonded non-woven fabrics are impregnated in the dispersion liquid of nanometer activated carbon fiber, and table is made
Face deposits the spun-bonded non-woven fabrics base material of nanometer activated carbon fiber；
Step 2)：Electrostatic spinning
Step 2.1)：Nano barium phthalate particle is added in N-N dimethylformamides, ultrasonic vibration is uniformly dispersed, and obtains
The dispersion liquid of nano barium phthalate uniform particle dispersion；
Step 2.2)：Polyacrylonitrile is added in the dispersion liquid, stirring and dissolving is uniform, is configured to polyacrylonitrile solution；
Step 2.3)：Polyacrylonitrile solution is prepared in by electrostatic spinning on base material made from step 1), electrostatic spinning
Process conditions be：Voltage 30KV receives distance 25cm, and injection speed 5m L/h, 25 DEG C of temperature, relative humidity 50% obtains
The composite filtering material of even deposition polyacrylonitrile nanofiber；
Step 3)：Surface modification and overlapping
Step 3.1)：Hexadecyl trimethoxy silane is dissolved in methanol, low-surface-energy solution is obtained；
Step 3.2)：Composite filtering material surface obtained by low-surface-energy solution spraying to step 3) is surface modified；
Step 3.3)：Polytetrafluoroethylporous porous membrane is impregnated in after being impregnated in low-surface-energy solution and is taken out, dried；
Step 3.4)：Composite filtering material after modification and polytetrafluoroethylene (PTFE) prepared by step 4.2) and step 4.3) is more
Pore membrane is superimposed, and the super-hydrophobic electret with air-cleaning function that the number of plies is 10 layers is made.
Comparative example 2
A kind of preparation method of the super-hydrophobic electret with air-cleaning function, includes the following steps：
Step 1)：Spun-bonded non-woven fabrics pre-treatment
Step 1.1)：Nanometer activated carbon fiber is added in ethyl alcohol, and ultrasonic disperse, obtains uniform dispersion liquid；
Step 1.2)：Drying is taken out after spun-bonded non-woven fabrics are impregnated in the dispersion liquid of nanometer activated carbon fiber, and table is made
Face deposits the spun-bonded non-woven fabrics base material of nanometer activated carbon fiber；
Step 2)：Composite superfine nanometer alginate fibre
Step 2.1)：Polyvinyl butyral solution is first prepared, high speed then is added in itself and superfine nano alginate fibre
Disperseed in beater, obtains uniform superfine nano alginate fibre dispersion liquid；
Step 2.2)：Spun-bonded non-woven fabrics base material made from step 1) is soaked in the superfine nano alginate fibre dispersion liquid
It takes out, dries after bubble, obtain the composite filtering material of fiber surface deposition superfine nano alginate fibre；
Step 3)：Electrostatic spinning
Step 3.1)：Nano barium phthalate particle is added in N-N dimethylformamides, ultrasonic vibration is uniformly dispersed, and obtains
The dispersion liquid of nano barium phthalate uniform particle dispersion；
Step 3.2)：Polyacrylonitrile is added in the dispersion liquid, stirring and dissolving is uniform, is configured to polyacrylonitrile solution；
Step 3.3)：Polyacrylonitrile solution is prepared in by electrostatic spinning on composite filtering material made from step 2), electrostatic
The process conditions of spinning are：Voltage 30KV receives distance 25cm, and injection speed 5m L/h, 25 DEG C of temperature, relative humidity 50% must
To the composite filtering material of uniform deposition polyacrylonitrile nanofiber；
Step 4)：Surface modification and overlapping
Step 4.1)：Hexadecyl trimethoxy silane is dissolved in methanol, low-surface-energy solution is obtained；
Step 4.2)：Composite filtering material surface obtained by low-surface-energy solution spraying to step 3) is surface modified；
Step 4.3)：Composite filtering material after modification prepared by step 4.2) is overlapped, the tool that the number of plies is 10 layers is made
There is the super-hydrophobic electret of air-cleaning function.
To pair of above-described embodiment 1 to 3 and comparative example 1 and the 2 super-hydrophobic electrets obtained with air-cleaning function
Filter efficiency, pressure drag, hydrophobicity and the Negative ion disengagement of 0.02~10 μm of particle are tested.
By above-mentioned test result it is found that 0.02~10 μm of super-hydrophobic electret pair made from the embodiment of the present invention 1 to 3
The filter efficiency of particle has excellent hydrophobicity and long-acting negative ion releasing function up to 99.999% or more, therefore energy
Enough enhance the stability of electret filter, and air can be purified to improve indoor environment.Super-hydrophobic electret prepared by comparative example 1
The filter efficiency of particle is poor compared with embodiment 1 to 3, and does not have Negative ion disengagement, it was demonstrated that filter material surface composite superfine is received
Rice alginate fibre, can generate anion, purify air；Comparative example 2 prepare super-hydrophobic electret particle filter efficiency compared with
Embodiment 1 to 3 is poor, it was demonstrated that in the overlapping of polytetrafluoroethylporous porous membrane, can enhance the filter efficiency of electret particle.
Finally it should be noted that：The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's
Within protection domain.
Claims (9)
1. a kind of preparation method of the super-hydrophobic electret with air-cleaning function, which is characterized in that include the following steps：
Step 1)：Spun-bonded non-woven fabrics pre-treatment
Step 1.1)：Titanium dioxide nanofiber or nanometer activated carbon fiber are added in ethyl alcohol, and ultrasonic disperse, are obtained uniformly
Dispersion liquid；
Step 1.2)：It is taken after spun-bonded non-woven fabrics are impregnated in the dispersion liquid of titanium dioxide nanofiber or nanometer activated carbon fiber
Go out drying, the spun-bonded non-woven fabrics base material of surface deposition of titanium oxide nanofiber or nanometer activated carbon fiber is made；
Step 2)：Composite superfine nanometer alginate fibre
Step 2.1)：Polyvinyl butyral solution is first prepared, high speed then, which is added, with superfine nano alginate fibre in it is beaten
Disperseed in machine, obtains uniform superfine nano alginate fibre dispersion liquid；
Step 2.2)：After spun-bonded non-woven fabrics base material made from step 1) is impregnated in the superfine nano alginate fibre dispersion liquid
It takes out, drying, obtains the composite filtering material of fiber surface deposition superfine nano alginate fibre；
Step 3)：Electrostatic spinning
Step 3.1)：Inorganic electret nano-particle is added in solvent, ultrasonic vibration is uniformly dispersed, and obtains inorganic electret and receives
The evenly dispersed dispersion liquid of rice corpuscles；
Step 3.2)：Polymer is added in the dispersion liquid, stirring and dissolving is uniform, is configured to polymer solution；
Step 3.3)：Polymer solution is prepared in by electrostatic spinning on composite filtering material made from step 2), is uniformly sunk
The composite filtering material of product polymer nanofiber；
Step 4)：Surface modification and overlapping
Step 4.1)：Low-surface energy substance is dissolved in solvent, low-surface-energy solution is obtained；
Step 4.2)：Composite filtering material surface obtained by low-surface-energy solution spraying to step 3) is surface modified；
Step 4.3)：Polytetrafluoroethylporous porous membrane is impregnated in after being impregnated in low-surface-energy solution and is taken out, dried；
Step 4.4)：Composite filtering material and polytetrafluoroethylporous porous membrane after modification prepared by step 4.2) and step 4.3)
It is superimposed, the super-hydrophobic electret with air-cleaning function is made.
2. the preparation method of the super-hydrophobic electret according to claim 1 with air-cleaning function, which is characterized in that
The inorganic electret nano-particle is silica, titanium dioxide, barium titanate, silicon nitride or tourmaline.
3. the preparation method of the super-hydrophobic electret according to claim 1 with air-cleaning function, which is characterized in that
Solvent in the step 3) is in N-N dimethylformamides, butanone, tetrahydrofuran, dichloromethane and methyl pyrrolidone
One or more kinds of mixing.
4. the preparation method of the super-hydrophobic electret according to claim 3 with air-cleaning function, which is characterized in that
Correspondence is as follows respectively for the polymer and solvent：
Kynoar：N-N dimethylformamides and butanone mass ratio are 1:1 mixed solvent；
Polyvinyl chloride：N-N dimethylformamides and tetrahydrofuran mass ratio are 1:1 mixed solvent；
Polyacrylonitrile：N-N dimethylformamides；
Makrolon：Dichloromethane；
Polyetherimide：N-N dimethylformamides and methyl pyrrolidone mass ratio are 1:1 mixed solvent；
Polystyrene：N-N dimethylformamides and tetrahydrofuran mass ratio are 3:1 mixed solvent；
Polyurethane：Butanone.
5. the preparation method of the super-hydrophobic electret according to claim 1 with air-cleaning function, which is characterized in that
The process conditions of electrostatic spinning are in the step 3)：Voltage 10-30KV receives distance 5-25cm, injection speed 1-5m L/h,
0-35 DEG C of temperature, relative humidity 0-70%.
6. the preparation method of the super-hydrophobic electret according to claim 1 with air-cleaning function, which is characterized in that
Low-surface energy substance described in the step 4) is stearic acid, hexadecyl trimethoxy silane, 1H, 1H, 2H, 2H- perfluoroparaffins
Ethyl triethoxy silicane alkane or 1H, 1H, 2H, 2H- perfluoroalkyl trichlorosilanes；The solvent refers to methanol or ethyl alcohol.
7. the preparation method of the super-hydrophobic electret according to claim 6 with air-cleaning function, which is characterized in that
Correspondence is as follows respectively for the low-surface energy substance and solvent：
Stearic acid：Ethyl alcohol；
Hexadecyl trimethoxy silane：Methanol；
1H, 1H, 2H, 2H- perfluoroalkyl triethoxysilane：Ethyl alcohol；
1H, 1H, 2H, 2H- perfluoroalkyl trichlorosilane：Ethyl alcohol.
8. the preparation method of the super-hydrophobic electret with air-cleaning function as described in any one of claim 1-7 is made
The super-hydrophobic electret with air-cleaning function obtained, which is characterized in that it is 2-10 layers that it, which is superimposed number of plies,.
9. the preparation method of the super-hydrophobic electret with air-cleaning function as described in any one of claim 1-7 is made
The super-hydrophobic electret with air-cleaning function obtained, which is characterized in that described that there is the super-hydrophobic of air-cleaning function to stay
The filter efficiency for the particle that 0.02~10 μm of polar body pair is up to 99.999% or more.
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| CN113521883A (en) * | 2021-07-29 | 2021-10-22 | 山东康康新材料科技有限公司 | Filter material containing alginic acid fiber and preparation method thereof |
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| CN114504951B (en) * | 2022-01-24 | 2023-09-22 | 华南理工大学 | A recyclable electret filter membrane and its preparation method, cleaning and charge regeneration method |
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