CN110302592A - The nanofiber of resistance to blowback Compound filtering material and preparation method thereof - Google Patents
The nanofiber of resistance to blowback Compound filtering material and preparation method thereof Download PDFInfo
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- CN110302592A CN110302592A CN201910599013.8A CN201910599013A CN110302592A CN 110302592 A CN110302592 A CN 110302592A CN 201910599013 A CN201910599013 A CN 201910599013A CN 110302592 A CN110302592 A CN 110302592A
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- blowback
- nanofiber
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- filtering material
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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
-
- 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
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
-
- 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
- B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
- B01D2239/0241—Types of fibres, filaments or particles, self-supporting or supported materials comprising electrically conductive fibres or particles
-
- 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
- B01D2239/0471—Surface coating material
- B01D2239/0492—Surface coating material on fibres
Abstract
The invention discloses a kind of preparation methods of the nanofiber of resistance to blowback Compound filtering material, comprising: provides a fiber-like substrate, conductive powder body is added during the preparation process to become static dissipative material in the substrate；And by the method for electrostatic spinning polymer solution in at least one side of the fiber base material depositing of nanofibrous layer to get arriving the Compound filtering material.The present invention also provides the nanofiber of resistance to blowback prepared by the above method Compound filtering materials.Preparation method disposal molding of the invention, simple process, production cost is low, the excellent performance of resistance to blowback of obtained Compound filtering material.
Description
Technical field
The present invention relates to filtering material fields, and in particular to a kind of nanofiber of resistance to blowback Compound filtering material and its preparation side
Method.
Background technique
Current air pollution problems inherent is concerned, and world's advocating environment protection high-efficiency environment friendly utilizes the energy.Gas turbine inlet air
System and industrial dedusting system to filtering substrate technical indicator from filter efficiency, resistance pressure drop, dust containing capacity, service life several not
It is disconnected to propose higher standard requirements.High-pressure electrostatic, which spins prepared nano-scale fiber net air filtering material, efficient, low-resistance feature.
Nanofiber composite air filter material and deep layer air filtration filter material compare the filtration mechanism due to nanofiber composite air filter material
It is to capture particle overwhelming majority particle packing in surface of filter medium based on the mechanical interception of surface, setting dynamic pulse can be passed through
Blowback is purified and is recycled, and has higher dust containing capacity longer if it can reach in the technical indicator actual use of resistance to blowback
Service life.
Current high-pressure electrostatic spinning nano fibre composite filtering material is that gas turbine inlet air system industrial dust-collecting air system is best
One of filtrate.Technological break-through realization industrial volume production has Donanldson, Finetex Mats in the worldTM,
AntimicrobeWebTM, NanoFilterTM, Fibra-WebTMBrand quotient.It is being removed outside Donanldson by investigation, Quan Shou
Lifeblood, which is rushed in blowback air-flow cleaning process, all there is the defect that different degrees of nanometer fiber net falls off from substrate, causes circulation anti-
It blows rear filter efficiency and dust containing capacity constantly declines, filter runing time serious curtailment increases use cost.
Domestic filter material technology falls behind relatively, from military (052 serial warship, 055 serial warship) to civilian Power Plant Gas Turbine into
The high-end filter core filter material of the gas system market (F9 class criteria EN779-2012) is by external (Donanldson) monopolization, according to the investigation country
Enterprises and institutions and technology universities and colleges rest on laboratory stage to high-pressure electrostatic spinning nano fibre technology majority, from equipment to technique volume production
There are also many technical matters to need to break through for nanofiber Compound filtering material.Such as: CN101940856A and CN102908829A patent
The technical indicator cleaned due to not accounting for life-cycle pulse backblowing in preparation, easily causes the broken ring of nanofiber wire side,
Product, which can not provide in the case where dynamic pulse blowback for gas turbine, stablizes good air.In CN104028047B patent
Make the technical solution for generating adhesion between fiber there are safety problem using solvent vapo(u)r, realizes that wear-resisting, antistripping method has
There is very big security risk.It is known that operating voltage is often up to tens of thousands of volts during high-voltage electrostatic spinning mass production, control is high
Strong middle solvent steam concentration of having a meeting, an audience, etc. well under one's control is the prerequisite of safe volume production.All there is industrial production simultaneously in above-mentioned existing technical patent
The characteristics of difficulty is big, and production process is many and diverse, high production cost.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of preparation method of the nanofiber of resistance to blowback Compound filtering material, the systems
Preparation Method disposal molding, simple process, production cost is low, the obtained Compound filtering material excellent performance of resistance to blowback.
It is an object of that present invention to provide a kind of preparation methods of the nanofiber of resistance to blowback Compound filtering material, comprising:
A fiber-like substrate is provided, conductive powder body is added during the preparation process to become static dissipative material in the substrate；
And
By the method for electrostatic spinning polymer solution in at least one side of the fiber base material depositing of nanofibrous layer,
Obtain the Compound filtering material.
Further, the minimum filter efficiency of the Compound filtering material is 60%.
Further, the substrate be manufactured paper with pulp by wet process papermaking technology the filter paper substrate prepared or by melt-blown legal system
Standby non-woven fabrics base material.Further, the weight of the filter paper substrate is 20~140gsm, and the weight of the non-woven fabrics base material is
20~250gsm.
Further, the raw material of the filter paper substrate includes following component as mass fraction: 10~19.5% increasing
Strong fiber, 5~7% conductive powder body and the wood pulp cellulose of surplus.
Further, the reinforcing fiber is selected from PET fiber and/or PP fiber, and diameter is preferably 50~70 μm, length
Preferably 5~10cm, reinforcing fiber can increase the stiffness, burst and weatherability of fiber-like substrate.
Further, the raw material of the non-woven fabrics base material includes following component as mass fraction: 5~7% conduction
The polymer of powder and surplus, the polymer is in polyester fiber (PET), polypropylene, Kynoar, PA6, PA66
At least one.
Further, the conductive powder body is selected from metal system conducting powder, metal oxide system conducting powder and carbon series conductive
At least one of powder, the partial size of conductive powder body are 50~6000nm, preferably 50~300nm.Wherein, the metal conductive powder
Including silver powder, aluminium powder and copper powder；The metal conductive oxide powder includes antimony-doped stannic oxide, Al-Doped ZnO and indium-doped oxidation
Tin；The carbon series conductive powder includes carbon fiber powder, conductive black, carbon nanotube and graphene.Preferably the conductive powder body is
Carbon fibe powder, with good electric conductivity, ductility and dispersibility, and it is at low cost.
Further, the polymer in the polymer solution is selected from least one of materials described below: Kynoar,
Polyurethane, polyacrylonitrile, polymethyl methacrylate, polylactic acid, polyamide, polyimides, Nomex, polybenzimidazoles,
Polyethylene terephthalate, polypropylene, polyaniline, polyethylene oxide, poly- naphthalene diacid second diester, poly terephthalic acid fourth two
Ester, SBR styrene butadiene rubbers, polystyrene, polyvinyl chloride, polyvinyl alcohol, polyvinyl butylene and their copolymer
Or derivative.
Further, Kynoar solution and polyurethane solutions that the polymer solution is 9:1~5:5 by mass ratio
It mixes；Made of the Kynoar solution is configured as the Kynoar that mass ratio is 1:9~20 and mixed solvent,
The polyurethane solutions are as made of polyurethane and the mixed solvent configuration of mass ratio 1:9~15；The mixed solvent includes matter
For amount than the solvent A and solvent B that are 9:1~5:5, the solvent A is n,N-Dimethylformamide or n,N-dimethylacetamide, institute
Stating solvent B is acetone or butanone.The advantages of combining two kinds of materials by Electrospun nano-fibers prepared by the polymer solution,
The characteristics such as intensity height, good toughness, wear-resisting, cold-resistant, oil resistant, water-fast, ageing-resistant, weatherability are embodied, while there is high waterproofness
Antibacterial, mould proof, anti-ultraviolet characteristic.
It further, include the conductive auxiliary agent of 0.01%~0.5wt% in the polymer solution, to increase polymer spun
The electric conductivity of silk liquid.Preferably, the conductive auxiliary agent is tetrabutylammonium perchlorate.
Another aspect of the present invention additionally provides the nanofiber of resistance to blowback Compound filtering material prepared by the above method.
The principle of the present invention are as follows: in the present invention, by joined conductive powder body in substrate fiber, make the table of substrate fiber
Surface resistance is in 104~1011Between Ω, become static dissipative material, the electrostatic charge of fiber surface is enabled to conduct in time
Dissipation is gone out.When receiving Electrospun nano-fibers with the substrate, fall in charge on the nanofiber on substrate fiber due to
There is no accumulation conditions and dissipate, disappear quickly, and fall in the nanofiber in substrate fiber hole, the charge on surface is then continuous
Enrichment, therefore the interpore nanofiber of substrate fiber finally generates potential difference with the nanofiber on substrate fiber by electret.
Under the action of electrostatic force, the drop point of high-voltage electrostatic spinning nanofiber is more intended on substrate fiber, finally on substrate
Form the greens (such as attached drawing 3, shown in 4) of random enrichment nanofiber.
The beneficial effects of the present invention are:
1. making the substrate of preparation become electrostatic by the way that conducting function powder is added in the preparation process of substrate in the present invention
Dissipative material is tended to by the distribution of the effectively control electrostatic spinning nano fiber of the adjustment to substrate fiber electrostatic resistivity size,
The contact area of nanofiber and substrate fiber is increased in the case where not obviously increasing resistance pressure drop, is received to enhance
The adhesiveness of rice fiber and substrate, improves resistance to blowback performance.
2. nanofiber Compound filtering material disposal molding produced by the invention, simple process, production cost is low, properties of product
It is outstanding.On F6-F8 rank (EN779-2012 standard) filter paper being synthetically prepared by wood pulp cellulose and chemical fibre, pass through electrostatic spraying
Nanofiber makes filter efficiency stably reach F9 (EN779-2012 standard) and the above rank.Resistance to blowback performance is perfect, warp
The resistance to pulse backblowing of test filter effect dust containing capacity and comprehensive performance reach the standard of international high-end air filtering material.
Detailed description of the invention
Fig. 1 is the schematic diagram of high-voltage electrostatic spinning apparatus single group used in embodiment and comparative example；
Fig. 2 is the Electronic Speculum sectional view of Compound filtering material prepared by embodiment 3, wherein 201 be nanoweb layer, 202 be base
Material layer；
Fig. 3 is nanofiber greens electron microscope in the Compound filtering material of the preparation of embodiment 3；
Fig. 4 is that nanofiber is distributed electron microscope in the Compound filtering material of the preparation of embodiment 3, wherein 401 be on substrate fiber points
The nanofiber enrichment region (nanofiber greens) of cloth, 402 be distribution nanofiber rarefaction in substrate gap；
Fig. 5 is the Phenom fiber metric figure of the nanofiber in Compound filtering material prepared by comparative example 3；
Fig. 6 is the Phenom fiber metric figure of the nanofiber in Compound filtering material prepared by embodiment 3；
Fig. 7 is the table after the composite nano fiber filter material blowback (@6kg@1000 times) of embodiment 3 (a) and comparative example 1 (b)
Face shape appearance figure；
Fig. 8 is national grid test report.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, so that those skilled in the art can be with
It more fully understands the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
1, raw material
Polyurethane, Lu Borun lubrizol Estane TPU X595A-11 or Bayer TUP 9395AU；
Kynoar, French A Kema ARKEMA Kynar PVDF 761A；
Ao Silong SY5043AD CW substrate: filter efficiency F7, quality 118gsm, thickness 0.29, Air permenbility 193L 200Pa
l/m2/ s, 42.1 μm of average pore size, 50 ± 5%@of filter efficiency, 0.3 μm of DEHS@32L；
RC-T380 carbon fiber powder originates from the auspicious innovative material Science and Technology Ltd. in Jiangsu Province Lianyun Harbour, density 1.77g/cm3,
Elongation 1.52%, carbon content 95.8%, ash 0.27%, water content 0.5%, partial size 4um, modulus 235Gpa, intensity
4950Mpa, conductivity 1.2 × 10-3。
2, production equipment
The embodiment of the present invention prepares 8 groups of spinneret systems (spinneret syringe needle is arranged upward) using industrialization assembly line and carries out high pressure
Electrospinning is received wherein industrialization high-pressure electrostatic spins assembly line as shown in Figure 1, it at least needs to configure following equipment: uncoil-stand 1
Winding apparatus 2, spinneret room frame 3, receiving screen 4, high-voltage DC power supply 5, spinning head 6, spinneret group 7, spinneret pack support 8, conveyer belt
9, transfer roller 10.The structure of spinning head and spinneret unit is detailed in CN201811180346.9 patent, with the industrialization high-pressure electrostatic
It spins the matched industrialization feed proportioning system of assembly line and liquid-supplying system is detailed in 105019042 B patent of CN, details are not described herein.Spray
Silk unit is modular assembly, can be prepared according to output demand with 4 multiple assembling such as: 4 groups, 8 groups, 16 groups or more.
3, detection device
The instrument that the present invention uses has: TEXTEST FX3300 air permeability tester, Phenom Pro Electronic Speculum, Phenom
Fiber metric system, wins abundant 8100 pulse backblowing testboard, FRASER 730SRM at TSI 8130A filter efficiency tester
Sheet resistance tester.
Examples 1 to 4: the nanofiber of resistance to blowback Compound filtering material is prepared
(1) filter paper substrate is prepared
According to the ratio of table 1, wood pulp cellulose, reinforcing fiber and conductive powder body are configured to mixed slurry and pass through wet process copy paper
Technology manufactures paper with pulp and prepares filter paper substrate.The weight of obtained filter paper substrate is 110gsm, and Air permenbility is 250L@200Pal/m2/ s,
Average pore size is 56 μm, and filter efficiency is 30 ± 5%@, 0.3 μm of DEHS@32L.
The formula of 1 filter paper substrate of table
| Wood pulp cellulose (wt%) | Reinforcing fiber (wt%) | Conductive powder body (wt%) | |
| Embodiment 1 | 80 | 17 | 3 |
| Embodiment 2 | 80 | 15 | 5 |
| Embodiment 3 | 80 | 13 | 7 |
| Embodiment 4 | 80 | 11 | 9 |
(2) nanofiber is prepared on filter paper substrate
Mixed solution parameter: solute material: Kynoar solution and polyurethane solutions ratio are 7:3, solution solid content:
9%wt, conductive auxiliary agent: 0.1% tetrabutylammonium perchlorate, solvent: 90.9%DMF/MEK8:2, viscosity: 220 ± 5cP, conductance
Rate: 300 ± 5 μ S/cm.
Production environment: constant temperature and humidity workshop, temperature (25 ± 2) DEG C, relative humidity (25 ± 5) %, enthalpy (37 ± 5) kJ,
Assembly line fresh-air volume 18000m3/ h recycles air quantity (air draft) 18100m3/ h, pneumatics (2.5 ± 0.5) Pa in equipment, solvent gas
Bulk concentration < (10 ± 0.5) ppm.
Manufacturing parameter: amount of solution 700g/h, spinning height 120mm, spinneret group velocity of displacement 45mm/s, shift length
50mm, spinning voltage 60kv, 8.8 meters/min of speed.
Preparation process:
The filter paper substrate of Examples 1 to 4 preparation is entered to the spinning stream for being provided with 8 groups of spinning packs by uncoil-stand 1
In waterline, ingredient and feed flow are carried out by industrialization feed proportioning system and liquid-supplying system, under the action of high voltage electric field, are located at thousands of
The solution of a spray head top end is enriched a large amount of charges and forms electrostatic repulsion forces, overcomes solution surface tension and itself glutinous elastic force
It forms electrified jet fast uplink and is drafted, the very fast evaporating solution of solvent is formed by curing nano-scale fiber uniform deposition in substrate
On, it loops finally by wrap-up 2, obtains Compound filtering material.
The parameter of the Compound filtering material of embodiment 1-4 preparation is as shown in table 2:
The performance parameter of the Compound filtering material of 2 embodiment 1-4 of table preparation
It is measured by Phenom fiber metric system, the diameter of nanofiber is concentrated in the Compound filtering material of embodiment 3
1864nm is concentrated in the hole of 249~331nm, nanometer fiber net2(see Fig. 6), 0 μm of average pore size.
Comparative example 1
Mixed solution parameter: solute material: Kynoar solution and polyurethane solutions ratio are 7:3, solution solid content:
9%wt conductive auxiliary agent: 0.1% tetrabutylammonium perchlorate, solvent: 90.9%DMF/MEK8:2, viscosity: 220 ± 5cP, conductance
Rate: 300 ± 5 μ S/cm；
Production environment: constant temperature and humidity workshop, temperature (25 ± 2) DEG C, relative humidity (25 ± 5) %, enthalpy (37 ± 5) kJ,
Assembly line fresh-air volume 18000m3/ h recycles air quantity (air draft) 18100m3/ h, pneumatics (2.5 ± 0.5) Pa in equipment, solvent gas
Bulk concentration < (10 ± 0.5) ppm.
Manufacturing parameter: amount of solution 700g/h, spinning height 120mm, spinneret group velocity of displacement 45mm/s, shift length
50mm, spinning voltage 60kv, 10 meters/min of speed.
Using this dragon SY5043AD CW substrate difficult to understand as filter paper substrate, high-voltage electrostatic spinning nanofiber is prepared on substrate,
The process of preparation is the same as embodiment 1.
Fibre diameter, which is measured, by Phenom fiber metric system concentrates on 270~396nm, nanometer fiber net
Hole concentrates on 2139nm2(see Fig. 5).It is by the Air permenbility that TEXTEST FX3300 air permeability tester measures Compound filtering material
157L@200Pal/m2/s.It is 80 ± 5%@by the filter efficiency that TSI 8130A filter efficiency tester measures Compound filtering material
0.3μm DEHS@32L。
The resistance to blowback test of pulse
Using winning the resistance to of Compound filtering material prepared by abundant 8100 pulse backblowing testboard difference testing example 3 and comparative example 1
Blowback performance, blowback air pressure are 3~6kg, and blowback area is 50.24cm2, blowback number is 1000 times, acquired results such as 3 institute of table
Show.
The resistance to blowback test result of 3 comparative example 1 of table and 3 sample of embodiment
According to the resistance to blowback data of the pulse of table 3 it can be found that on this difficult to understand dragon SY5043AD CW substrate electro spinning nano fiber
Obtained Compound filtering material, in the case where pulse backblowing air pressure is 4~5kg, being decreased obviously occurs in filter efficiency；Work as blowback air
Filter efficiency has dropped 30% or so when pressure increases to 6kg.By the electron microscope of Fig. 7 it can be found that the Compound filtering material of comparative example 1
There is serious disrepair phenomenon.
And the resistance to blowback of Compound filtering material prepared by embodiment 3 is had excellent performance, the filter efficiency when blowback air pressure is 3~5kg
Do not decline, when blowback air pressure increases to 6kg, filter efficiency is still without there is apparent decline.Pass through Fig. 7's
Electron microscope is not it can be found that breakage occurs in the Compound filtering material surface.
Referring to the national grid test report of Fig. 8, the Compound filtering material of embodiment 3 is reaching F9 (EN779-2012 standard)
In the case of filter efficiency, but without there is apparent resistance pressure drop.This is because the Compound filtering material of embodiment 1 increases Nanowire
The contact area of peacekeeping substrate enhances the adhesiveness of nanometer fiber net and substrate, to realize excellent resistance to blowback performance.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
It encloses without being limited thereto.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in the present invention
Protection scope within.Protection scope of the present invention is subject to claims.
Claims (11)
1. a kind of preparation method of the nanofiber of resistance to blowback Compound filtering material characterized by comprising
A fiber-like substrate is provided, conductive powder body is added during the preparation process to become static dissipative material in the substrate；And
By the method for electrostatic spinning polymer solution in at least one side of the fiber base material depositing of nanofibrous layer to get
To the Compound filtering material.
2. the preparation method of the nanofiber of resistance to blowback Compound filtering material as described in claim 1, which is characterized in that the substrate is
Manufactured paper with pulp by wet process papermaking technology the filter paper substrate prepared or by meltblown prepare non-woven fabrics base material.
3. the preparation method of the nanofiber of resistance to blowback Compound filtering material as claimed in claim 2, which is characterized in that the filter paper base
The raw material of material includes following component as mass fraction: 10~19.5% reinforcing fiber, 5~7% conductive powder body and remaining
The wood pulp cellulose of amount.
4. the preparation method of the nanofiber of resistance to blowback Compound filtering material as claimed in claim 2, which is characterized in that the non-woven fabrics
The raw material of substrate includes following component as mass fraction: 5~7% conductive powder body and the polymer of surplus, described poly-
It closes object and is selected from least one of PET, polypropylene, Kynoar, PA6, PA66.
5. the preparation method of the nanofiber of resistance to blowback Compound filtering material as described in claim 3 or 4, which is characterized in that described to lead
Electric powder is selected from least one of metal system conducting powder, metal oxide system conducting powder and carbon series conductive powder, conductive powder body
Partial size be 50~6000nm.
6. the preparation method of the nanofiber of resistance to blowback Compound filtering material as claimed in claim 5, which is characterized in that the metal is led
Electric powder includes silver powder, aluminium powder and copper powder；The metal conductive oxide powder includes antimony-doped stannic oxide, Al-Doped ZnO and indium-doped
Tin oxide；The carbon series conductive powder includes carbon fiber powder, conductive black, carbon nanotube and graphene.
7. the preparation method of the nanofiber of resistance to blowback Compound filtering material as described in claim 1, which is characterized in that the polymer
Polymer in solution is selected from least one of materials described below: Kynoar, polyurethane, polyacrylonitrile, polymethyl
Sour methyl esters, polylactic acid, polyamide, polyimides, Nomex, polybenzimidazoles, polyethylene terephthalate, polypropylene,
Polyaniline, polyethylene oxide, poly- naphthalene diacid second diester, polybutylene terephthalate, SBR styrene butadiene rubbers, polyphenyl second
Alkene, polyvinyl chloride, polyvinyl alcohol, polyvinyl butylene and their copolymer or derivative.
8. the preparation method of the nanofiber of resistance to blowback Compound filtering material as claimed in claim 7, which is characterized in that the polymer
Solution is mixed by the Kynoar solution that mass ratio is 9:1~5:5 with polyurethane solutions；
The Kynoar solution is described as made of the Kynoar that mass ratio is 1:9~20 and mixed solvent configuration
Polyurethane solutions are as made of polyurethane and the mixed solvent configuration of mass ratio 1:9~15；
The mixed solvent includes the solvent A and solvent B that mass ratio is 9:1~5:5, and the solvent A is N, N- dimethyl formyl
Amine or n,N-dimethylacetamide, the solvent B are acetone or butanone.
9. the preparation method of the nanofiber of resistance to blowback Compound filtering material as described in claim 1, which is characterized in that the polymer
It include the conductive auxiliary agent of 0.01%~0.5wt% in solution.
10. the preparation method of the nanofiber of resistance to blowback Compound filtering material as claimed in claim 9, which is characterized in that the conduction
Auxiliary agent is tetrabutylammonium perchlorate.
11. the nanofiber of the resistance to blowback Compound filtering material that described in any item methods are prepared according to claim 1~10.
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| CN110743249A (en) * | 2019-10-30 | 2020-02-04 | 博裕纤维科技（苏州）有限公司 | Back-blowing resistant nanofiber composite filter material with anchor points |
| CN111282345A (en) * | 2020-02-24 | 2020-06-16 | 深圳维度新材料有限公司 | Preparation method of composite material layer, composite material layer and air purification filter material |
| CN111457525A (en) * | 2020-04-27 | 2020-07-28 | 蚌埠泰鑫材料技术有限公司 | Flexible composite fiber material for sterilizing and filtering fresh air system |
| CN113559726A (en) * | 2021-07-19 | 2021-10-29 | 宁波方太厨具有限公司 | Composite nanofiber filter screen and preparation method thereof |
| KR20220045459A (en) * | 2020-10-05 | 2022-04-12 | 주식회사 휴비스 | High Heat Resistant Multilayer Filter Media |
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