CN113136631A - Preparation method of conductive nanofiber, composite nanofiber filter screen and preparation method thereof - Google Patents
Preparation method of conductive nanofiber, composite nanofiber filter screen and preparation method thereof Download PDFInfo
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- CN113136631A CN113136631A CN202110266896.8A CN202110266896A CN113136631A CN 113136631 A CN113136631 A CN 113136631A CN 202110266896 A CN202110266896 A CN 202110266896A CN 113136631 A CN113136631 A CN 113136631A
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- nanofiber
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- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/09—Addition of substances to the spinning solution or to the melt for making electroconductive or anti-static filaments
-
- 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
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0092—Electro-spinning characterised by the electro-spinning apparatus characterised by the electrical field, e.g. combined with a magnetic fields, using biased or alternating fields
-
- 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
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/48—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polymers of halogenated hydrocarbons
-
- 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
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/50—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyalcohols, polyacetals or polyketals
-
- 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
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/54—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polymers of unsaturated nitriles
-
- 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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—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 by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
-
- 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
- D04H1/58—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 by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
-
- 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
- B01D2239/025—Types of fibres, filaments or particles, self-supporting or supported materials comprising nanofibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
Abstract
A preparation method of conductive nano-fiber is characterized by comprising the following steps: adding polyaniline into an organic solvent, adding a fiber-forming polymer to prepare a spinning solution, standing and cooling the dissolved spinning solution, and finally performing electrostatic spinning to obtain the conductive nanofiber. The invention also provides a composite nanofiber filter screen and a preparation method thereof. After the prepared conductive nano is loaded with high voltage, point discharge can occur due to the thin diameter of the nano fiber, and surrounding air is ionized to form negative ions. The conductive nano-fiber is compounded with the melt-blown non-woven fabric, so that the attenuation of the electret charge can be delayed.
Description
Technical Field
The invention relates to an air filter fiber, a filter fiber formed by electrostatic spinning of fiber-forming polymers, a composite fiber filter screen and a preparation method of the composite fiber filter screen.
Background
Along with the rapid development of economy, the haze problem is increasingly prominent in recent years, and the haze problem becomes the focus of attention of people. The fine particles suspended in the haze can enter the lung and the cardiovascular system of a human body through a respiratory system, so that the problems of the reduction of the immunity of the human body, the lung cancer and the like are caused.
The main techniques of existing air filtration are electrostatic dust collection and membrane separation. Electrostatic dust collection is a process of making dust charged by electrostatic high-voltage discharge and then electrostatically adsorbed, but the technology has better effect on particles with larger particle size, if the adsorption efficiency is to be improved, the voltage must be increased, and if the voltage is too high, the side effect of ozone is easily generated. The membrane separation technology uses most melt-blown electret fibers, and combines a non-woven melt-blown material with an electret technology, so that the filtration efficiency can be greatly improved on the premise of not increasing the pressure drop, but the charge injected by the electret mode is extremely easy to attenuate, and the stable filtration efficiency is difficult to maintain. Especially in high temperature and humid environments, the filtration efficiency of the meltblown film is greatly reduced after the charge decays, and a new filter screen needs to be replaced without maintaining higher capability of purifying particles, so that the cost of a user is greatly increased. If an electret mode is not adopted, the filtering of particles only by a physical mode needs the filtering membrane to have the characteristics of small pore diameter and high porosity, and the nano fiber has the advantages just above, but still inevitably generates larger pressure drop in the using process.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a method for preparing a conductive nanofiber capable of generating negative ions after being loaded with high voltage.
The second technical problem to be solved by the present invention is to provide a composite nanofiber filter screen capable of delaying the attenuation of electret charge in view of the above technical situation.
The third technical problem to be solved by the present invention is to provide a method for preparing a composite nanofiber filter screen capable of delaying electret charge decay, in view of the above technical status quo.
The technical scheme adopted by the invention for solving the first technical problem is as follows: a preparation method of conductive nano-fiber is characterized by comprising the following steps: adding polyaniline into an organic solvent, adding a fiber-forming polymer, preparing a spinning solution with the concentration of 5-20 wt%, wherein the viscosity of the spinning solution is 800-2500 mPa & s, the dissolving temperature is 40-80 ℃, standing and cooling the dissolved spinning solution, and finally performing electrostatic spinning to obtain the conductive nanofiber, wherein the mass ratio of aniline to the fiber-forming polymer is 1: 3-1: 10.
Preferably, the organic solvent is at least one of N, N-dimethylformamide, N-dimethylacetamide, dimethyl sulfoxide and acetone.
Preferably, the fiber-forming polymer is at least one of polyacrylonitrile, polyvinyl butyral, polystyrene, polyvinylidene fluoride, nylon, polycarbonate, polyether sulfone, and the like
Preferably, the electrospinning conditions are as follows: the spinning parameter is 10-25 KV, the distance between the electrode wire and the collecting substrate is 5-30 cm, the liquid supply speed is 10-200 ul/min, the rotating speed of the collector is 300-3000 rpm, the spinning temperature is 20-30 ℃, the humidity is 40-70%, and the spinning time is 5-60 min.
Preferably, the conductive nanofibers have a resistivity of 102～104Ω·m
Preferably, the spinning solution is added with an inorganic salt, the inorganic salt and the fiber-forming polymerThe amount ratio is 1: 100-1: 10000. The inorganic salt can be NaCl, LiCl, CaCl, KCl, NaNO3、KNO3、Na2CO3。
Preferably, the spinning solution is added with a surfactant, and the mass ratio of the surfactant to the fiber-forming polymer is 1: 100-1: 10000. The surfactant may be polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (F127, P123) polymer surfactant, sodium dodecylbenzene sulfonate (SDBS) anionic surfactant, Cetyl Trimethyl Ammonium Bromide (CTAB), Sodium Dodecyl Sulfate (SDS), cetyl trimethyl ammonium bromide (HTAB) cationic surfactant, and polyethylene glycol octyl phenyl ether (Triton X-100).
The technical scheme adopted by the invention for solving the second technical problem is as follows: a composite nanofiber filter screen comprises conductive nanofibers and melt-blown non-woven fabrics bonded with the conductive nanofibers into a whole.
The technical scheme adopted by the invention for solving the third technical problem is as follows: the preparation method of the composite nanofiber filter screen is characterized by comprising the following steps of: and gluing by using a nozzle of a glue gun, adopting waterborne polyurethane, bonding one surface of a polyethylene glycol terephthalate framework supporting layer of the melt-blown electret fiber filter material with the conductive nano-fibers, and firmly pressing by using a press roller after bonding to form the composite nano-fiber filter screen.
Preferably, the aqueous polyurethane has a weight dilution ratio of 50% and a coating amount of 2g/m2-5g/m2。
Compared with the prior art, the invention has the advantages that: the nanofiber membrane prepared by electrostatic spinning has high specific surface area and high porosity, and can obviously enhance the interception effect on micro particles. The polyaniline in a conductive state is characterized in that after acid doping, H + and anions (such as Cl-, sulfate, phosphate and the like) enter a main chain, and are combined with N atoms in amine and imine groups to form a polar and a dipole delocalized to a P bond of the whole molecular chain, so that the polyaniline has higher conductivity; polyaniline is an excellent photo-thermal conversion material besides the antibacterial action of the polyaniline, can be quickly converted into high heat under the condition of short-time illumination, realizes quick sterilization, and is favorable for improving the sterilization efficiency due to quick accumulation of heat in a short time.
After the prepared conductive nano is loaded with high voltage, point discharge can occur due to the thin diameter of the nano fiber, and surrounding air is ionized to form negative ions. The conductive nano-fiber is compounded with the melt-blown non-woven fabric, so that the attenuation of electret charge can be delayed, the filtering efficiency and the service life of the filter screen are prolonged, and the filter screen is suitable for the environment with high humidity.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1 a solution having a solid content of 10% by weight and a viscosity of 1100mPa · s and a dissolution temperature of 40 ℃ was prepared by adding 0.3g of polyaniline and 0.002g of licl to 90g of dmf which is an organic solvent, and then adding 9.7g of polyvinyl butyral ester PVB. Standing and cooling the dissolved solution for 12h, then putting the solution into a needle tube, adjusting the spinning parameter to 10KV, the distance between a wire electrode and a collecting substrate to be 8cm, the liquid supply speed to be 30ul/min, the rotating speed of a collector to be 3000rpm, the spinning temperature to be 25 ℃, the humidity to be 40%, starting spinning, preparing the conductive PVB nano fiber, the spinning time to be 30min, and the gram weight of the nano fiber to be 3.2g/m2。
Testing the electrical resistivity of conductive PVB nanofibers to 104Ω·m。
Diluting waterborne polyurethane with water to 50 Wt%, loading into a glue gun, and uniformly spraying on the PET surface of H10 with a spraying amount of 2g/m2And then the filter cloth is bonded with the conductive PVB nano fibers, and the bonded filter cloth enters a press roller to be pressed firmly to form the composite nano fiber filter screen.
| Sample (I) | Rate of sterilization |
| H10 | 12％ |
| Composite nano fiber filter screen | 93％ |
And (3) testing the filtration efficiency:
the filtering performance of the composite nanofiber membrane is tested by adopting a TSI 8130 type automatic filter material tester, a sample is in a circular shape with the area of 10cm2, NaCl aerosol with the mass median diameter of particle particles of 0.26um is generated, and the air flow speed is 32L/min.
The penetration rate k of the particles is obtained by testing the concentration of the particles at two ends of the membrane, and then the filtration efficiency eta is obtained
Accelerated aging test:
10 cigarettes are lit and placed in front of a fan, and the fan drives an air flow mixed with smoke particles to pass through the membrane filter material.
And (3) testing the sterilization rate:
regard as the light source with the flash lamp, the perpendicular distance of flash lamp and nanofiber membrane is 2-4 cm, and the compound nanofiber filter screen after will polluting is divided into two sets of illumination and not illumination, then puts into the incubator with the sample, observes the bacterium and grows the condition to reacing the bactericidal rate:
example 2, 1.2g of polyaniline and 0.005g of Sodium Dodecylbenzenesulfonate (SDBS) were addedAn organic solvent N, N-dimethylformamide (85 g DMF) is added, and then 13.8g Polyacrylonitrile (PAN) is added to prepare a solution with the solid content of 15 wt%, wherein the viscosity of the solution is 1400mPa & s, and the dissolving temperature is 40 ℃. Standing and cooling the dissolved solution for 12h, then putting the solution into a needle tube, adjusting spinning parameters to be 16.5KV, adjusting the distance between a wire electrode and a collecting substrate to be 12cm, the liquid supply speed to be 50ul/min, the rotating speed of a collector to be 3000rpm, the spinning temperature to be 25 ℃, the humidity to be 40%, starting spinning, preparing conductive PAN nano fiber, wherein the spinning time is 23min, and the gram weight of the nano fiber is 2.5g/m2。
Testing conductive PAN nanofibers for resistivity of 103Ω·m。
Diluting waterborne polyurethane with water to 50 Wt%, loading into a glue gun, and uniformly spraying on the PET surface of H11 with a spraying amount of 3g/m2And then bonding the conductive PAN nanofiber with the conductive PAN nanofiber, and pressing the conductive PAN nanofiber and the conductive PAN nanofiber in a press roller to form the composite nanofiber filter screen after bonding.
| Sample (I) | Rate of sterilization |
| H11 | 13％ |
| Composite nano fiber filter screen | 95％ |
Example 3 polyaniline (1.8 g) and Sodium Dodecyl Sulfate (SDS) (0.006 g) were added to an organic solvent, N-dimethylethylAmide 80g DMAC, then 18.2g polyvinylidene fluoride PVDF was added to prepare a solution having a concentration of 20% by weight of solid content, the viscosity of the solution was 1950 mPas, and the dissolution temperature was 40 ℃. Standing and cooling the dissolved solution for 12h, then putting the solution into a needle tube, adjusting the spinning parameter to be 19KV, the distance between a wire electrode and a collecting substrate to be 15cm, the liquid supply speed to be 100ul/min, the rotating speed of a collector to be 3000rpm, the spinning temperature to be 25 ℃, the humidity to be 40%, starting spinning, preparing the conductive PVDF nano fiber, wherein the gram weight of the nano fiber is 2.1g/m2。
Testing the electrical resistivity of conductive PVDF nanofibers to be 102Ω·m。
Diluting waterborne polyurethane with water to 50 Wt%, loading into a glue gun, and uniformly spraying on the PET surface of H11 with a spraying amount of 3g/m2And then bonding the composite nanofiber filter screen with the conductive PVDF nanofiber, and then pressing the bonded composite nanofiber filter screen in a pressing roller to form the composite nanofiber filter screen.
| Sample (I) | Rate of sterilization |
| H11 | 13％ |
| Composite nano fiber filter screen | 98％ |
Claims (10)
1. A preparation method of conductive nano-fiber is characterized by comprising the following steps: adding polyaniline into an organic solvent, adding a fiber-forming polymer, preparing a spinning solution with the concentration of 5-20 wt%, wherein the viscosity of the spinning solution is 800-2500 mPa & s, the dissolving temperature is 40-80 ℃, standing and cooling the dissolved spinning solution, and finally performing electrostatic spinning to obtain the conductive nanofiber, wherein the mass ratio of aniline to the fiber-forming polymer is 1: 3-1: 10.
2. The method of claim 1, wherein the organic solvent is at least one of N, N-dimethylformamide, N-dimethylacetamide, dimethylsulfoxide, and acetone.
3. The method for preparing conductive nanofiber according to claim 1, wherein the fiber-forming polymer is at least one of polyacrylonitrile, polyvinyl butyral, polystyrene, polyvinylidene fluoride, nylon, polycarbonate, polyethersulfone.
4. The method for preparing conductive nanofibers according to claim 1, characterized in that the electrospinning conditions are as follows: the spinning parameter is 10-25 KV, the distance between the electrode wire and the collecting substrate is 5-30 cm, the liquid supply speed is 10-200 ul/min, the rotating speed of the collector is 300-3000 rpm, the spinning temperature is 20-30 ℃, the humidity is 40-70%, and the spinning time is 5-60 min.
5. The method for preparing conductive nanofiber as claimed in claim 1, wherein the conductive nanofiber has a resistivity of 102～104Ω·m。
6. The method for preparing conductive nanofibers according to claim 1, wherein an inorganic salt is added to the spinning solution, and the mass ratio of the inorganic salt to the fiber-forming polymer is 1:100 to 1: 10000.
7. The preparation method of the conductive nanofiber according to claim 1, wherein a surfactant is added into the spinning solution, and the mass ratio of the surfactant to the fiber-forming polymer is 1: 100-1: 10000.
8. A composite nanofiber filter screen with the conductive nanofiber as claimed in any one of claims 1 to 7, comprising the conductive nanofiber and a melt-blown non-woven fabric bonded with the conductive nanofiber into a whole.
9. The method of making a composite nanofiber screen according to claim 8, comprising the steps of: and gluing by using a nozzle of a glue gun, adopting waterborne polyurethane, bonding one surface of a polyethylene glycol terephthalate framework supporting layer of the melt-blown electret fiber filter material with the conductive nano-fibers, and firmly pressing by using a press roller after bonding to form the composite nano-fiber filter screen.
10. The method for preparing the composite nanofiber filter screen as claimed in claim 9, wherein the weight dilution ratio of the waterborne polyurethane is 50%, and the coating amount of the waterborne polyurethane is 2g/m2-5g/m2。
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| CN202110266896.8A CN113136631A (en) | 2021-03-12 | 2021-03-12 | Preparation method of conductive nanofiber, composite nanofiber filter screen and preparation method thereof |
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| CN202110266896.8A CN113136631A (en) | 2021-03-12 | 2021-03-12 | Preparation method of conductive nanofiber, composite nanofiber filter screen and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104289042A (en) * | 2014-09-05 | 2015-01-21 | 东华大学 | Electrospinning nano-fiber electret filtering material and its preparation method |
| CN105133187A (en) * | 2015-07-22 | 2015-12-09 | 东华大学 | Method for manufacturing electrospun nanofiber gas filtering material in mass manner |
| CN110180400A (en) * | 2019-05-07 | 2019-08-30 | 华南理工大学 | A kind of conductive-nano-fibers filter membrane and preparation method thereof |
| CN111495213A (en) * | 2019-01-30 | 2020-08-07 | 宁波方太厨具有限公司 | Preparation method of nanofiber filtering membrane |
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2021
- 2021-03-12 CN CN202110266896.8A patent/CN113136631A/en active Pending
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|---|---|---|---|---|
| CN104289042A (en) * | 2014-09-05 | 2015-01-21 | 东华大学 | Electrospinning nano-fiber electret filtering material and its preparation method |
| CN105133187A (en) * | 2015-07-22 | 2015-12-09 | 东华大学 | Method for manufacturing electrospun nanofiber gas filtering material in mass manner |
| CN111495213A (en) * | 2019-01-30 | 2020-08-07 | 宁波方太厨具有限公司 | Preparation method of nanofiber filtering membrane |
| CN110180400A (en) * | 2019-05-07 | 2019-08-30 | 华南理工大学 | A kind of conductive-nano-fibers filter membrane and preparation method thereof |
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