CN116672904B - High-porosity polylactic acid efficient air filtering membrane based on triboelectric effect and preparation method thereof - Google Patents
High-porosity polylactic acid efficient air filtering membrane based on triboelectric effect and preparation method thereof Download PDFInfo
- Publication number
- CN116672904B CN116672904B CN202310823193.XA CN202310823193A CN116672904B CN 116672904 B CN116672904 B CN 116672904B CN 202310823193 A CN202310823193 A CN 202310823193A CN 116672904 B CN116672904 B CN 116672904B
- Authority
- CN
- China
- Prior art keywords
- porosity
- membrane
- preparing
- plla
- polylactic acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 152
- 238000001914 filtration Methods 0.000 title claims abstract description 86
- 229920000747 poly(lactic acid) Polymers 0.000 title claims abstract description 56
- 239000004626 polylactic acid Substances 0.000 title claims abstract description 56
- 230000000694 effects Effects 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 229920001432 poly(L-lactide) Polymers 0.000 claims abstract description 75
- JVTAAEKCZFNVCJ-REOHCLBHSA-N L-lactic acid Chemical compound C[C@H](O)C(O)=O JVTAAEKCZFNVCJ-REOHCLBHSA-N 0.000 claims abstract description 74
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000000835 fiber Substances 0.000 claims abstract description 67
- 239000002042 Silver nanowire Substances 0.000 claims abstract description 58
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000009987 spinning Methods 0.000 claims abstract description 19
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 13
- 229910001961 silver nitrate Inorganic materials 0.000 claims abstract description 13
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 10
- 239000002270 dispersing agent Substances 0.000 claims abstract description 7
- 239000006185 dispersion Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000002667 nucleating agent Substances 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 7
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 33
- 238000006243 chemical reaction Methods 0.000 claims description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 6
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 5
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 5
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 5
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 4
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 4
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 4
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 229960001701 chloroform Drugs 0.000 claims 1
- 244000005700 microbiome Species 0.000 abstract description 10
- 230000002779 inactivation Effects 0.000 abstract description 6
- 241000894006 Bacteria Species 0.000 abstract description 3
- 238000013016 damping Methods 0.000 abstract 1
- 238000007144 microwave assisted synthesis reaction Methods 0.000 abstract 1
- 239000005022 packaging material Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 23
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 12
- 239000000463 material Substances 0.000 description 10
- 230000000840 anti-viral effect Effects 0.000 description 9
- 238000007731 hot pressing Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 230000000241 respiratory effect Effects 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 230000000845 anti-microbial effect Effects 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- -1 polypropylene Polymers 0.000 description 5
- 230000000415 inactivating effect Effects 0.000 description 4
- 230000029058 respiratory gaseous exchange Effects 0.000 description 4
- 230000001954 sterilising effect Effects 0.000 description 4
- 238000004659 sterilization and disinfection Methods 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 241000700605 Viruses Species 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000001580 bacterial effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002121 nanofiber Substances 0.000 description 2
- 239000002070 nanowire Substances 0.000 description 2
- 244000052769 pathogen Species 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 208000024172 Cardiovascular disease Diseases 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241000711573 Coronaviridae Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 206010058467 Lung neoplasm malignant Diseases 0.000 description 1
- 241000589517 Pseudomonas aeruginosa Species 0.000 description 1
- 206010057190 Respiratory tract infections Diseases 0.000 description 1
- 241000191967 Staphylococcus aureus Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 241000194017 Streptococcus Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000002832 anti-viral assay Methods 0.000 description 1
- 239000003831 antifriction material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000621 bronchi Anatomy 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001523 electrospinning Methods 0.000 description 1
- 238000007786 electrostatic charging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000002949 hemolytic effect Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 201000005202 lung cancer Diseases 0.000 description 1
- 208000020816 lung neoplasm Diseases 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 241000712461 unidentified influenza virus Species 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/48—Polyesters
-
- 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
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0079—Manufacture of membranes comprising organic and inorganic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/48—Antimicrobial properties
Abstract
The invention discloses a high-porosity polylactic acid efficient air filtering membrane based on a triboelectric effect and a preparation method thereof, wherein the preparation method comprises the following steps: s1, preparing a PLLA fiber membrane with high porosity: dissolving PLLA in a solvent 1 to obtain spinning solution, and preparing PLLA fiber membranes by an electrostatic spinning technology; s2, preparing silver nanowire dispersion liquid: uniformly mixing a dispersing agent in a silver nitrate solution, adding a nucleating agent, and preparing a silver nanowire dispersion liquid by a microwave-assisted synthesis method; s3, preparing a silver nanowire electrode film: uniformly adhering the dispersion liquid obtained in the step S2 to polylactic acid non-woven fabrics to obtain a silver nanowire electrode film; s4, preparing a high-porosity high-efficiency low-resistance PLLA antibacterial filter membrane: and combining the PLLA fiber membrane obtained in the step S1 with the electrode membrane obtained in the step S3 to obtain the high-porosity high-efficiency low-damping bacteria filtering membrane. The invention has the characteristics of degradability, high-efficiency microorganism inactivation, high mechanical property, low resistance and excellent PM filtering performance, and is an air filtering membrane with wide prospect.
Description
Technical Field
The invention belongs to the technical field of fiber filtering membranes, and particularly relates to a high-porosity polylactic acid efficient air filtering membrane based on a triboelectric effect and a preparation method thereof.
Background
With the rapid development of global industrialization, the problem of air pollution is increasingly serious. Particulate Matter (PMs), in particular Particles (PM) having an aerodynamic diameter of less than 2.5 [ mu ] m 2.5 ) Is easy to be attached with toxic and harmful substances (such as heavy metals, pathogens and the like) and can enter bronchi and lungs of human bodies almost unhindered, thereby causing respiratory tract infection, lung cancer, cardiovascular diseases and the like. In addition, the world is still faced with a severe epidemic spreading form, and the traditional mask cannot meet the requirements of fire-extinguishing pathogens. Therefore, in order to cut off virus transmission and ensure human health, development of an air filtration membrane which is efficient in inactivating microorganisms, low in filtration resistance and excellent in filtration effect is urgently required.
At present, most of traditional filtering membranes are used for carrying out electrostatic charging on polypropylene fibers in the melt-blowing manufacturing process, so that the polypropylene fibers become electrostatic electret melt-blowing cloth. However, polypropylene is difficult to degrade in nature, presents a great challenge to environmental protection, and polylactic acid is considered as a most potential alternative.
Polylactic acid is a most representative biodegradable material, the raw materials of the polylactic acid are prepared from starch extracted from plants, and carbon dioxide and water generated by degradation in nature can be reused by the plants through photosynthesis, so that the polylactic acid reflects a recyclable and sustainable green cycle. Because of the advantages of excellent mechanical property, good biocompatibility, no toxicity, mild property and the like, the air filter has wide application prospect in the air filtration field.
However, the conventional polylactic acid fiber membranes have the following problems in practical use as air filtration membranes: (1) When the anti-friction material is used alone, the tensile strength and the triboelectric effect are relatively poor, and the tensile property is required to be improved; (2) The charge collection and potential field forming capability is relatively poor, and the potential is insufficient; (3) poor antimicrobial activity; in addition, the filter medium has the characteristic of high filtration resistance and can influence the potential of the filter medium during long-term storage.
Therefore, there is an urgent need for an improvement in polylactic acid fiber filtration membranes for better application to air filtration.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a high-porosity polylactic acid high-efficiency air filtering membrane with high surface potential, antimicrobial activity and low filtration resistance based on triboelectric effect and a preparation method thereof, which meet the requirements of the high-efficiency air filtering membrane.
The specific technical scheme is as follows:
the high-porosity polylactic acid high-efficiency air filtering membrane based on the triboelectric effect comprises a high-porosity PLLA (L-polylactic acid) fiber membrane and a silver nanowire electrode membrane, wherein the silver nanowire electrode membrane is positioned on the side surface of the high-porosity PLLA fiber membrane.
Further, the two silver nanowire electrode films are respectively arranged on two side surfaces of the high-porosity PLLA fiber film, and the high-porosity PLLA fiber film and the silver nanowire electrode films are arranged in a three-layer sandwich structure.
Further, the gap between the high-porosity PLLA fiber membrane and the silver nanowire electrode membrane is less than 0.5mm; the average diameter of PLLA fibers is 0.01-2 μm, and the gram weight of the obtained PLLA fiber membrane is 1.0-8.0g/m 2 。
The preparation method for obtaining the high-porosity polylactic acid efficient air filtering membrane based on the triboelectric effect comprises the following steps:
s1, preparing a PLLA fiber membrane with high porosity: dissolving the dried PLLA in a solvent 1 to obtain spinning solution, and preparing a PLLA fiber membrane with high porosity by an electrostatic spinning technology;
s2, preparing silver nanowire dispersion liquid: uniformly mixing a dispersing agent in a silver nitrate solution, adding a nucleating agent, and transferring the mixed solution to a microwave-assisted synthesizer for reaction to obtain a silver nanowire dispersion;
s3, preparing a silver nanowire electrode film: uniformly adhering the dispersion liquid obtained in the step S2 to polylactic acid non-woven fabrics to prepare a silver nanowire electrode film;
s4, preparing a high-porosity high-efficiency low-resistance PLLA antibacterial filtering membrane: combining the PLLA fiber membrane obtained in the step S1 with the silver nanowire electrode membrane obtained in the step S3 to obtain the high-porosity polylactic acid high-efficiency air filtering membrane based on the triboelectric effect
Further, the water content of PLLA after drying in the step S1 is less than 0.05%, the solvent 1 is at least one of dimethyl carbonate (DMC), N-N Dimethylformamide (DMF), dichloromethane and chloroform, and the mass concentration of PLLA in the spinning solution is 0.03-0.30g/mL.
Further, the output voltage of the electrostatic spinning used in the step S1 is 25-50kV, the solution consumption rate is 0.1-2mL/h, the fiber winding rate is 200-5000rpm, the spinning temperature is 20-50 ℃, the spinning humidity is 40-80%, and the longitudinal wind speed is 5-20m/S.
Further, the solvent of the silver nitrate solution in the step S2 is at least one of water, ethanol and glycol, and the concentration range of the silver nitrate is 0.1-2mol/L.
Further, in the step S2, the dispersing agent is at least one of polyvinylpyrrolidone (PVP), sodium Dodecyl Benzene Sulfonate (SDBS) and cetyltrimethylammonium bromide (CTAB), and the concentration of the dispersing agent in the solution is 0.05-0.1mol/L.
Furthermore, the nucleating agent in the step S2 is at least one of sodium chloride, potassium chloride, ferric chloride, calcium chloride, aluminum chloride and other water-soluble chloride salts capable of providing chloride ions, and the concentration of the nucleating agent in the solution is 0.05-0.2mol/L.
Further, the output power of the microwave-assisted synthesizer in the step S2 is 200-1500W, the reaction temperature is 60-220 ℃, and the reaction time is 15min-2h.
Further, the method for adhering the silver nanowire dispersion liquid to the polylactic acid non-woven fabric in the step S3 is any one of eccentric spin coating, spray coating, suction filtration, drip coating, doctor blade coating, dip coating, meier rod coating and roll-to-roll coating, and the method requires drying until the moisture content is less than 1%, and the gram weight of the polylactic acid non-woven fabric is 18-100g/m 2 。
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) The high-porosity PLLA fiber membrane is obtained by adopting a method of increasing humidity and adding longitudinal wind to assist electrostatic spinning, a triboelectric layer of the triboelectric nano generator is provided, the silver nano fiber membrane obtained by spraying and other modes is uniform and stable, the good triboelectric output effect is ensured, and the triboelectric nano generator structure is formed by a combined membrane mode, so that the high-porosity polylactic acid high-efficiency air filtering membrane based on the triboelectric effect, which has the advantages of degradability, high potential, antimicrobial activity, high mechanical property, simple preparation process, excellent PMs filtering effect and low filtering resistance, is obtained.
(2) The high-porosity polylactic acid high-efficiency air filtering membrane based on the triboelectric effect has the filtering efficiency of PMs reaching 99.0% -99.99%, maintains the surface potential at 11-15kV, has the breathing resistance of 100-120Pa, the tensile strength of 15-22MPa, the antiviral efficiency of 98.9% -99.98%, and the antibacterial efficiency of 99.0% -99.98%.
(3) The high-porosity polylactic acid efficient air filtering membrane based on the triboelectric effect has wide application prospect.
Drawings
FIG. 1 is a route diagram of a preparation method of the present invention;
FIG. 2 is a scanning electron microscope image of a high-porosity polylactic acid high-efficiency air filtration membrane based on triboelectric effect.
Detailed Description
The following detailed description of the invention is provided merely to provide further explanation of the invention and is not to be construed as limiting the invention.
The polylactic acid shows shearing friction electricity due to chiral centers in molecular chains, polarization treatment of an external electric field is not needed, voltage can be generated through mechanical action, and the method is simple and efficient and is easy to realize large-scale production. According to the invention, the polylactic acid filter membrane with the high porosity structure is manufactured by the method of increasing humidity and adding longitudinal air flow, and the polylactic acid and the metal electrode are combined, so that the triboelectric performance of the polylactic acid can be greatly improved.
Silver is a noble metal with certain high mechanical property and certain microorganism inactivation, has stable physicochemical properties, good heat conduction and bacteriostasis effects, is soft, and is widely applied to various fields such as electronic appliances, photosensitive materials, process ornaments, chemical materials, biological fields and the like. In the invention, the applicant combs silver ions into nanowires, and the specific surface area of the nanowires is greatly increased, so that the effects of capturing and filtering particulate matters are achieved, and the conductivity of the particulate matters is improved.
In order to meet the requirements of high-efficiency filtering membranes, the high-porosity PLLA fiber membranes are obtained by adopting a method of increasing humidity and adding longitudinal wind to assist electrostatic spinning, silver nanowires are synthesized by using a silver nitrate solution in a microwave-assisted manner, and further the silver nanowire electrode membranes are prepared, and the two fiber membrane structures are combined according to a sandwich structure by using a structure of silver nanowire electrode membrane-high-porosity PLLA fiber membrane-silver nanowire electrode membrane or according to a structure of silver nanowire electrode membrane-high-porosity PLLA fiber membrane, so that the filtering membranes meeting the requirements can be formed. The filtering membrane has the characteristics of degradability, high potential, high-efficiency microorganism inactivation, high mechanical property, simple preparation process, excellent filtering effect on PMs and low filtration resistance, and is a high-performance air filtering membrane with wide application prospect.
Example 1:
s1, preparing a PLLA fiber membrane with high porosity: dissolving 0.03g PLLA in 10mL of mixed solution of DMF and DMC with the volume ratio of 3:7 to obtain spinning solution with the PLLA mass concentration of 0.03g/mL, and preparing the spinning solution with the average fiber diameter of 1 mu m and the gram weight of 8g/m by an electrostatic spinning technology (output voltage of 25kV, solution consumption rate of 0.1mL/h, drum rate of 200rmp, spinning temperature of 20 ℃, humidity of 30% and wind speed of 5 m/s) 2 Is a high porosity PLLA fiber membrane.
S2, preparing silver nanowire dispersion liquid: uniformly mixing 0.1mol/L silver nitrate aqueous solution, 0.05mol/L PVP solution and 0.05mol/L NaCl solution, and transferring the mixed solution into a microwave-assisted synthesizer for reaction (the output power is 200W, the reaction temperature is 60 ℃ and the reaction time is 15 min) to obtain silver nanowire dispersion liquid.
S3, preparing a silver nanowire electrode film: uniformly adhering silver nanowires to polylactic acid non-woven fabric (gram weight of 18 g/m) by using a spraying method to obtain the dispersion liquid obtained in the step S2 2 ) And (3) obtaining the silver nanowire electrode film, and drying to enable the moisture of the silver nanowire electrode film to be less than 1%.
S4, preparing a high-porosity high-efficiency low-resistance sterilization PLLA filter membrane: combining the high-porosity PLLA fiber membrane obtained in the step S1 with a silver nanowire electrode membrane according to a sandwich structure, then carrying out hot pressing on edges to enable three membranes to be combined together, or combining the high-porosity PLLA fiber membrane according to a structure of the silver nanowire electrode membrane, then carrying out hot pressing on edges to enable two membranes to be combined together, and obtaining the high-porosity polylactic acid high-efficiency air filtering membrane based on the triboelectric effect.
Example 2:
s1, preparing a PLLA fiber membrane with high porosity: dissolving 0.3g PLLA in 10mL of 3:7 mixed solution of chloroform and DMC to obtain spinning solution with PLLA mass concentration of 0.03g/mL, and preparing the spinning solution with average fiber diameter of 0.01 mu m and gram weight of 7g/m by an electrostatic spinning technology (output voltage of 25kV, solution consumption rate of 0.1mL/h, drum rate of 5000rmp, spinning temperature of 20 ℃, humidity of 60% and wind speed of 20 m/s) 2 PLLA fiber membranes of (2).
S2, preparing silver nanowire dispersion liquid: uniformly mixing 0.1mol/L of silver nitrate aqueous solution with 0.01mol/L of SDBS solution and 0.05mol/L of KCl solution, and transferring the mixed solution into a microwave-assisted synthesizer for reaction (output power is 1500W, reaction temperature is 220 ℃ and reaction time is 2 h) to obtain silver nanowire dispersion liquid.
S3, preparing a silver nanowire electrode film: uniformly adhering silver nanowires to polylactic acid non-woven fabric (gram weight of 18 g/m) by using a spraying method to obtain the dispersion liquid obtained in the step S2 2 ) And (3) obtaining the silver nanowire electrode film, and drying to enable the moisture of the silver nanowire electrode film to be less than 0.5%.
S4, preparing a high-porosity high-efficiency low-resistance sterilization PLLA filter membrane: combining the high-porosity PLLA fiber membrane obtained in the step S1 with a silver nanowire electrode membrane according to a sandwich structure, then carrying out hot pressing on edges to enable three membranes to be combined together, or combining the high-porosity PLLA fiber membrane according to a structure of the silver nanowire electrode membrane, then carrying out hot pressing on edges to enable two membranes to be combined together, and obtaining the high-porosity polylactic acid high-efficiency air filtering membrane based on the triboelectric effect.
Example 3:
31. preparation of high porosity PLLA fiber membranes: 4g PLLA is dissolved in 10mL of mixed solution of DMF and chloroform in the ratio of 3:7 to obtain spinning solution with PLLA mass concentration of 0.4g/mL, and the average fiber diameter of 1 μm and gram weight of 8g/m are prepared by an electrostatic spinning technology (output voltage of 50kV, solution consumption rate of 2mL/h, drum rate of 3000rmp, spinning temperature of 50 ℃, humidity of 40% and wind speed of 15 m/s) 2 PLLA fiber membranes of (2).
S2, preparing silver nanowire dispersion liquid: mixing 2mol/L silver nitrate water solution with 0.1mol/L CTAB solution and 0.2mol/L FeCl 3 The solution is mixed evenly, and the mixed solution is transferred to a microwave-assisted synthesizer for reaction (the output power is 700W, the reaction temperature is 70 ℃ and the reaction time is 15 min) to obtain silver nanowire dispersion liquid.
S3, preparing a silver nanowire electrode film: uniformly adhering silver nanowires to polylactic acid non-woven fabric (gram weight 200 g/m) by using a spraying method to obtain the dispersion liquid obtained in the step S2 2 ) And (3) obtaining the silver nanowire electrode film, and drying to enable the moisture of the silver nanowire electrode film to be less than 1%.
S4, preparing a high-porosity high-efficiency low-resistance sterilization PLLA filter membrane: combining the high-porosity PLLA fiber membrane obtained in the step S1 with a silver nanowire electrode membrane according to a sandwich structure, then carrying out hot pressing on edges to enable three membranes to be combined together, or combining the high-porosity PLLA fiber membrane according to a structure of the silver nanowire electrode membrane, then carrying out hot pressing on edges to enable two membranes to be combined together, and obtaining the high-porosity polylactic acid high-efficiency air filtering membrane based on the triboelectric effect.
Example 4:
s1, preparing a PLLA fiber membrane with high porosity: 1g PLLA was dissolved in 10mL of a 3:7 DMF+DMC mixed solution to obtain a PLLA mass concentration of 0.1g/mL of a spinning dope, and the average fiber diameter of 1 μm and the grammage of 1g/m were obtained by electrospinning (output voltage 25kV, solution consumption rate 0.8mL/h, drum rate 3000rmp, spinning temperature 40 ℃ C.) 2 PLLA fiber membranes of (2).
S2, preparing silver nanowire dispersion liquid: uniformly mixing 0.1mol/L silver nitrate aqueous solution, 0.08mol/L PVP solution and 0.05mol/L NaCl solution, and transferring the mixed solution into a microwave-assisted synthesizer for reaction (output power 1000W, reaction temperature 120 ℃ and reaction time 1 h) to obtain silver nanowire dispersion liquid.
S3, preparing a silver nanowire electrode film: uniformly adhering silver nanowires to polylactic acid non-woven fabric (gram weight 100 g/m) by using a spraying method to obtain a dispersion liquid obtained in the step S2 2 ) And (3) obtaining the silver nanowire electrode film, and drying to enable the moisture of the silver nanowire electrode film to be less than 1%.
S4, preparing a high-porosity high-efficiency low-resistance sterilization PLLA filter membrane: combining the high-porosity PLLA fiber membrane obtained in the step S1 with a silver nanowire electrode membrane according to a sandwich structure, then carrying out hot pressing on edges to enable three membranes to be combined together, or combining the high-porosity PLLA fiber membrane according to a structure of the silver nanowire electrode membrane, then carrying out hot pressing on edges to enable two membranes to be combined together, and obtaining the high-porosity polylactic acid high-efficiency air filtering membrane based on the triboelectric effect.
Comparative example 1 (PLLA fiber membrane not employing high porosity):
a filtration membrane was prepared essentially as in example 1, except that instead of using an increased humidity, longitudinal wind assisted electrospun PLLA fiber membrane as an intermediate layer, the electrospun PLLA fiber membrane (gram weight 18g/m 2 ) The filter membrane is obtained by combining the filter membrane with a silver nanowire electrode membrane in a structure of silver nanowire electrode membrane-electrostatic spinning PLLA fiber membrane-silver nanowire electrode membrane.
Comparative example 2 (without silver nanowire electrode film):
the filtration membrane was prepared essentially by the method of example 2, except that the silver nanowire electrode film was not used as an electrode in this example, but a copper mesh (copper wire diameter 0.1 mm) was used as an electrode film, and the copper mesh and PLLA fiber film were combined in a "copper mesh-PLLA fiber film-copper mesh" structure to obtain the filtration membrane.
Comparative example 3 (no triboelectric material as filtration membrane):
the filtering membrane was prepared basically by the method of example 3, except that the filtering membrane of the N95 mask (trade mark 3m 9132) was used instead of the PLLA fiber membrane for performance test in this example, and the filtering membrane was obtained by a structural combination of "silver nanowire electrode membrane-N95 electret filter material-silver nanowire electrode membrane".
The following structural characterization and performance tests were performed on the filtration membranes of examples 1-4 and comparative examples 1-3:
scanning electron microscope: the microstructure of the high-porosity polylactic acid high-efficiency air filtration membrane based on triboelectric effect was observed by a field emission scanning electron microscope (model JSM-7900F, japan electron).
Dielectric constant test: the dielectric constant was measured by a dielectric constant tester (model WayneKerr 6500B, wayneKerr, UK).
Antimicrobial activity test: the microbial index required in GB190832010 medical protective mask is adopted for detection, and the standard is as follows: staphylococcus aureus, coliform bacteria, pseudomonas aeruginosa, hemolytic streptococcus and fungus colonies cannot be detected, and the total bacterial colony count cannot exceed 20CFU/g; the bacterial filtration efficiency of YY 0469-2011 technical requirement of medical surgical mask is not less than 95%.
Antiviral testing the antiviral performance of textiles finished by the high-efficiency antiviral fibers by adopting a method provided by ISO 18184:2019 'antiviral textile test Standard'. Experiments the antiviral efficiency of the material can be obtained by comparing the numbers of viruses on blank control samples and test samples after 2 hours of contact with viruses (influenza virus H1N1 and coronavirus HCov-229E).
Tensile property test: the resulting fibrous film was cut to obtain tensile bars, and the tensile properties of the composite were tested according to the plastic tensile properties test standard in ASTM D638-2003 of the american society for testing and materials using a universal stretcher (model 4403, sensor 100N) from Instron, usa. At least 3 parallel test samples were secured for each group and the results averaged.
Surface potential test: the nanofiber membrane was tested for surface potential using a noncontact electrostatic meter (VM 54XQS, quatek company, usa) at a test height of 2cm and constant temperature and humidity of 25 ℃ and 45%, and 20 data points were randomly collected for each sample and averaged.
Respiratory resistance test: the breathing resistance is measured by adopting a micropressure meter (AIRPROAP 800, TSI company of America), a humanoid breathing instrument and a simulated human head, the gas flow rate is set to be 85L/min, a filtering membrane is packaged on the simulated human head, the air pressure of the air and the cavity formed by the filtering material and the human head are respectively measured and differed, the experiment is repeated for three times, and the average value is obtained, so that the breathing resistance of the filtering membrane is calculated.
Filtration performance test: fiber membranes (area 113.04 cm) were tested using an LZC-K automatic filter tester (Suzhou Huada instruments Co., ltd.) 2 ) The air filtration performance of (2) is set to 85L/min, and the particle size range of NaCl atomized particles generated by the aerosol generator is 0.1-10 mu m. At least 3 different positions were tested for each set of fibrous membranes and the results averaged.
The test results are shown in tables 1-3:
TABLE 1 test results of respiratory resistance, dielectric constant, mechanical properties, surface potential and filtration performance of high-porosity polylactic acid high-efficiency air filtration membrane based on triboelectric effect
TABLE 2 high porosity polylactic acid efficient air filtration membrane antiviral test based on triboelectric effect
Table 3 experimental results of antimicrobial activity test of high-porosity polylactic acid high-efficiency air filtration membrane based on triboelectric effect:
the surface potential test, the dielectric constant test, the filtration efficiency test, the respiratory resistance test, the mechanical property test, the antiviral test, the antibacterial test, the filtration efficiency test and the like are carried out on the high-porosity polylactic acid high-efficiency air filtration membrane based on the triboelectric effect, and the results show that (table 1-table 3) the filtration efficiency of the high-porosity polylactic acid high-efficiency air filtration membrane PMs reaches 99.0% -99.99%, the surface potential is maintained at 11-15kV, the respiratory resistance is 100-120Pa, the tensile strength is 15-22MPa, the antiviral efficiency is 98.9% -99.98%, and the bacterial filtration efficiency is 99.0% -99.98%.
The experiment adopts 4 groups of examples and 3 groups of comparative examples, and the examples show that when experimental conditions are changed, the relevant changes of experimental results show that increasing the content of polylactic acid can effectively increase the triboelectric and charge storage capacity of a filtering membrane, can maintain the surface potential at about 15kV, and has little change of electric quantity within 30 days; the increase of the silver nitrate content can effectively reduce the diameter of silver nanowires, improve the specific surface area of the silver nanowires, and improve the capturing and inactivating capacities of active microorganisms, and the filter membrane prepared according to the invention can maintain the filtration efficiency of bacteria at 99.0% -99.98%, and the antiviral efficiency can reach 98.9% -99.98%. Considering comprehensively, the experimental conditions changed in the 4 groups of examples do not have excessive influence on the experimental results, i.e. the experiment is feasible.
In the 3 groups of comparative examples, experimental comparison is made by a method of replacing a high-porosity PLLA fiber membrane with an electrostatic spinning PLLA fiber membrane which is assisted by increasing humidity and longitudinal wind, replacing a silver nanowire electrode membrane with a copper mesh and replacing a high-porosity polylactic acid high-efficiency air filtering membrane with an electret filter material of an N95 mask, and the result shows that the purchased polylactic acid non-woven fabric cannot achieve the same triboelectric effect as the high-porosity polylactic acid high-efficiency air filtering membrane of electrostatic spinning, namely the effects of maintaining surface potential, filtering and inactivating microorganisms and adsorbing and capturing PMs for a long time are greatly influenced, the respiratory resistance is obviously improved, and the requirements of low filtration resistance, microorganism inactivation and high efficiency cannot be met; the method of replacing the PLLA fiber membrane with high porosity by the electret filter material of the N95 mask can greatly improve the respiratory resistance of the filter membrane, if the filter membrane is put into production and used, the human body can generate obvious uncomfortable feeling, the filter and inactivation effects on microorganisms are poor, and the requirements of low filter resistance and microorganism inactivation provided by the invention can not be met; the use of copper mesh instead of silver nanowire electrode film can not effectively produce the effect of inactivating and filtering microorganisms.
According to the comprehensive observation of the embodiment and the comparative example, the experimental method provided by the invention is feasible, and the manufactured product meets the expectations, and the used materials are reasonable, so that the high-porosity polylactic acid high-efficiency air filtering membrane based on the triboelectric effect is a high-performance air filtering membrane with great potential and wide application prospect.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. The high-porosity polylactic acid high-efficiency air filtering membrane based on the triboelectric effect is characterized by comprising a high-porosity PLLA fiber membrane and a silver nanowire electrode membrane, wherein the silver nanowire electrode membrane is positioned on the side surface of the high-porosity PLLA fiber membrane; the two silver nanowire electrode films are respectively arranged on two side surfaces of the high-porosity PLLA fiber film, and the high-porosity PLLA fiber film and the silver nanowire electrode films are arranged in a three-layer sandwich structure; the gap between the high-porosity PLLA fiber membrane and the silver nanowire electrode membrane is less than 0.5mm; the average diameter of PLLA fibers is 0.01-2 μm, and the gram weight of the obtained PLLA fiber membrane is 1.0-8.0g/m 2 。
2. The method for preparing the high-porosity polylactic acid efficient air filtering membrane based on the triboelectric effect according to claim 1, which is characterized by comprising the following steps:
s1, preparing a PLLA fiber membrane with high porosity: dissolving the dried PLLA in a solvent 1 to obtain spinning solution, and preparing a PLLA fiber membrane with high porosity by an electrostatic spinning technology;
s2, preparing silver nanowire dispersion liquid: uniformly mixing a dispersing agent in a silver nitrate solution, adding a nucleating agent, and transferring the mixed solution to a microwave-assisted synthesizer for reaction to obtain a silver nanowire dispersion;
s3, preparing a silver nanowire electrode film: uniformly adhering the dispersion liquid obtained in the step S2 to polylactic acid non-woven fabrics to prepare a silver nanowire electrode film;
s4, preparing a high-porosity high-efficiency low-resistance PLLA antibacterial filtering membrane: and combining the PLLA fiber membrane obtained in the step S1 with the silver nanowire electrode membrane obtained in the step S3 to obtain the high-porosity polylactic acid high-efficiency air filtering membrane based on the triboelectric effect.
3. The method for preparing the high-efficiency air filtration membrane of the high-porosity polylactic acid based on the triboelectric effect according to claim 2, wherein the water content of PLLA after drying in the step S1 is less than 0.05%, the solvent 1 is at least one of dimethyl carbonate, N-N dimethylformamide, dichloromethane and trichloromethane, and the mass concentration of the PLLA in the spinning solution is 0.03-0.30g/mL.
4. The method for preparing a high-efficiency air filtration membrane of high-porosity polylactic acid based on triboelectric effect according to claim 3, wherein the electrostatic spinning used in the step S1 has an output voltage of 25-50kV, a solution consumption rate of 0.1-2mL/h, a fiber winding rate of 200-5000rpm, a spinning temperature of 20-50 ℃, a spinning humidity of 40-80% and a longitudinal wind speed of 5-20m/S.
5. The method for preparing the high-efficiency air filtration membrane of the high-porosity polylactic acid based on the triboelectric effect according to claim 3, wherein the solvent of the silver nitrate solution in the step S2 is at least one of water, ethanol and glycol, and the concentration range of the silver nitrate is 0.1-2mol/L.
6. The method for preparing the high-efficiency air filtering membrane of the high-porosity polylactic acid based on the triboelectric effect according to claim 3, wherein the dispersing agent in the step S2 is at least one of polyvinylpyrrolidone, sodium dodecyl benzene sulfonate and cetyltrimethylammonium bromide, and the concentration of the dispersing agent in the solution is 0.05-0.1mol/L.
7. The method for preparing the high-efficiency air filtering membrane of the high-porosity polylactic acid based on the triboelectric effect according to claim 3, wherein the nucleating agent in the step S2 is at least one of sodium chloride, potassium chloride, ferric chloride, calcium chloride and aluminum chloride, and the concentration of the nucleating agent in the solution is 0.05-0.2mol/L.
8. The method for preparing the high-efficiency air filtering membrane of the polylactic acid with high porosity based on the triboelectric effect according to claim 3, wherein the output power of the microwave-assisted synthesizer in the step S2 is 200-1500W, the reaction temperature is 60-220 ℃, and the reaction time is 15min-2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310823193.XA CN116672904B (en) | 2023-07-06 | 2023-07-06 | High-porosity polylactic acid efficient air filtering membrane based on triboelectric effect and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310823193.XA CN116672904B (en) | 2023-07-06 | 2023-07-06 | High-porosity polylactic acid efficient air filtering membrane based on triboelectric effect and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116672904A CN116672904A (en) | 2023-09-01 |
| CN116672904B true CN116672904B (en) | 2024-02-02 |
Family
ID=87787405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310823193.XA Active CN116672904B (en) | 2023-07-06 | 2023-07-06 | High-porosity polylactic acid efficient air filtering membrane based on triboelectric effect and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116672904B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139742A (en) * | 2006-09-04 | 2008-03-12 | 中国科学院化学研究所 | Fibre structure of carbon nano tube/nano oxide nano composite material and preparation method and use thereof |
| CN102302875A (en) * | 2011-07-27 | 2012-01-04 | 东华大学 | Method for preparing antibacterial air-filtering membrane |
| CN103520999A (en) * | 2012-07-06 | 2014-01-22 | 北京服装学院 | Antibacterial composite nanometer fiber high-efficiency air filtering material and preparation method thereof |
| CN104815483A (en) * | 2015-04-20 | 2015-08-05 | 上海洁晟环保科技有限公司 | Composite anti-microbial air filtration material, preparation method and application |
| CN107617344A (en) * | 2017-09-01 | 2018-01-23 | 中国科学院宁波材料技术与工程研究所 | Load polymer microporous film of nano wire and preparation method thereof |
| GB202018833D0 (en) * | 2020-11-30 | 2021-01-13 | Hardshell Uk Limted | Air filtration apparatus |
| CN112923954A (en) * | 2021-01-25 | 2021-06-08 | 西安工业大学 | Integrated flexible sensor based on sandwich type spinning film and manufacturing method |
| WO2023060027A1 (en) * | 2021-10-07 | 2023-04-13 | Matregenix, Inc. | Electrospun nanofibrous polymer membrane for use in air filtration applications |
| CN115970400A (en) * | 2023-02-16 | 2023-04-18 | 中国矿业大学 | Friction self-powered stereo-structure composite polylactic acid nanofiber membrane for ultra-long-acting filtration and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ303299B6 (en) * | 2011-01-17 | 2012-07-18 | Royal Natural Medicine, S.R.O. | Mouth-screen and process for producing thereof |
| US20230167591A1 (en) * | 2020-03-31 | 2023-06-01 | Matregenix, Inc. | Electrospun nanofibrous polymer membrane for use in air filtration applications |
-
2023
- 2023-07-06 CN CN202310823193.XA patent/CN116672904B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139742A (en) * | 2006-09-04 | 2008-03-12 | 中国科学院化学研究所 | Fibre structure of carbon nano tube/nano oxide nano composite material and preparation method and use thereof |
| CN102302875A (en) * | 2011-07-27 | 2012-01-04 | 东华大学 | Method for preparing antibacterial air-filtering membrane |
| CN103520999A (en) * | 2012-07-06 | 2014-01-22 | 北京服装学院 | Antibacterial composite nanometer fiber high-efficiency air filtering material and preparation method thereof |
| CN104815483A (en) * | 2015-04-20 | 2015-08-05 | 上海洁晟环保科技有限公司 | Composite anti-microbial air filtration material, preparation method and application |
| CN107617344A (en) * | 2017-09-01 | 2018-01-23 | 中国科学院宁波材料技术与工程研究所 | Load polymer microporous film of nano wire and preparation method thereof |
| GB202018833D0 (en) * | 2020-11-30 | 2021-01-13 | Hardshell Uk Limted | Air filtration apparatus |
| CN112923954A (en) * | 2021-01-25 | 2021-06-08 | 西安工业大学 | Integrated flexible sensor based on sandwich type spinning film and manufacturing method |
| WO2023060027A1 (en) * | 2021-10-07 | 2023-04-13 | Matregenix, Inc. | Electrospun nanofibrous polymer membrane for use in air filtration applications |
| CN115970400A (en) * | 2023-02-16 | 2023-04-18 | 中国矿业大学 | Friction self-powered stereo-structure composite polylactic acid nanofiber membrane for ultra-long-acting filtration and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| ZnO-PLLA/PLLA Preparation and Application in Air Filtration by Electrospinning Technology;Liu, Xinxin;《POLYMERS》;第15卷(第8期);1906 * |
| 医用口罩过滤材料的研究进展;周惠林;杨卫民;李好义;;纺织学报(08);94-100 * |
| 邹专勇.《纺纱新技术》.中国纺织出版社,2020,180-185. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116672904A (en) | 2023-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109675450B (en) | Antibacterial composite nanofiber membrane and preparation method and application thereof | |
| He et al. | Tailoring moisture electroactive Ag/Zn@ cotton coupled with electrospun PVDF/PS nanofibers for antimicrobial face masks | |
| Gao et al. | Recent progress and challenges in solution blow spinning | |
| CN109137131B (en) | Solution spraying method modified antibacterial degradable nanofiber and application thereof in air filtration | |
| Wang et al. | Silk nanofibers as high efficient and lightweight air filter | |
| Wang et al. | Needleless electrospinning for scaled-up production of ultrafine chitosan hybrid nanofibers used for air filtration | |
| CN104083946B (en) | Antibacterial mask filter disc and preparation method thereof and antibacterial mask | |
| Amna et al. | Zinc oxide-doped poly (urethane) spider web nanofibrous scaffold via one-step electrospinning: a novel matrix for tissue engineering | |
| CN113797649B (en) | Antibacterial and antivirus air filtering material and preparation method thereof | |
| CN109468751B (en) | Nano fiber air purification material containing chitosan powder on surface and preparation method thereof | |
| Tian et al. | Polycaprolactone nanofiber membrane modified with halloysite and ZnO for anti-bacterial and air filtration | |
| He et al. | Green and antimicrobial 5-bromosalicylic acid/polyvinyl butyral nanofibrous membranes enable interception-sterilization-integrated bioprotection | |
| Jiang et al. | Three-dimensional composite electrospun nanofibrous membrane by multi-jet electrospinning with sheath gas for high-efficiency antibiosis air filtration | |
| CN112127049A (en) | Preparation method of polypropylene melt-blown non-woven fabric material for mask | |
| Shao et al. | Polystyrene/fluorinated polyurethane electrospinning nanofiber membranes incorporated with graphene oxide–halamine as mask filter materials for reusable antibacterial applications | |
| Zhang et al. | Large-scale blow spinning of nanofiber membranes for highly efficient air mechanical filtration with antibacterial activity | |
| CN116672904B (en) | High-porosity polylactic acid efficient air filtering membrane based on triboelectric effect and preparation method thereof | |
| JP2013194329A (en) | Method for producing nanocomposite-nanofiber | |
| CN112808026B (en) | Nanofiber film and preparation method and application thereof | |
| Yang et al. | Antibacterial, efficient and sustainable CS/PVA/GA electrospun nanofiber membrane for air filtration | |
| Zhou et al. | Effect of different antibacterial agents doping in PET-based electrospun nanofibrous membranes on air filtration and antibacterial performance | |
| CN113235186A (en) | Preparation method of antibacterial polylactic acid nanofiber | |
| Yang et al. | Nanopatterning of beaded poly (lactic acid) nanofibers for highly electroactive, breathable, UV-shielding and antibacterial protective membranes | |
| CN116712874A (en) | High-porosity self-energized stereocomplex polylactic acid fiber filtering membrane and preparation method thereof | |
| Wang et al. | Polarity-dominated chitosan biguanide hydrochloride-based nanofibrous membrane with antibacterial activity for long-lasting air filtration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |