CN111557501A - High-breathability nano silver wire composite grid antibacterial mask and manufacturing method thereof - Google Patents
High-breathability nano silver wire composite grid antibacterial mask and manufacturing method thereof Download PDFInfo
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- CN111557501A CN111557501A CN202010420020.XA CN202010420020A CN111557501A CN 111557501 A CN111557501 A CN 111557501A CN 202010420020 A CN202010420020 A CN 202010420020A CN 111557501 A CN111557501 A CN 111557501A
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- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 51
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 27
- 230000001954 sterilising effect Effects 0.000 claims abstract description 7
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 83
- 239000002042 Silver nanowire Substances 0.000 claims description 44
- 239000000758 substrate Substances 0.000 claims description 30
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- 239000011248 coating agent Substances 0.000 claims description 19
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 17
- 239000004745 nonwoven fabric Substances 0.000 claims description 16
- 230000035699 permeability Effects 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 12
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 12
- 238000007731 hot pressing Methods 0.000 claims description 10
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
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Images
Classifications
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D27/00—Details of garments or of their making
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/14—Air permeable, i.e. capable of being penetrated by gases
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/30—Antimicrobial, e.g. antibacterial
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
-
- 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
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
- A61L2209/20—Method-related aspects
- A61L2209/21—Use of chemical compounds for treating air or the like
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- Textile Engineering (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physical Education & Sports Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Epidemiology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Filtering Materials (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
The invention provides a high-permeability nano silver wire composite grid antibacterial mask and a manufacturing method thereof. The filtering layer of the protective mask has the characteristics of good electric conductivity, large specific surface area, strong activity, optimized structure and the like, can ensure free circulation of air and improve the wearing comfort of the mask while realizing excellent sterilization and antiviral properties. In addition, the preparation process of the nano silver wire grid filter screen is simple and flexible, grid structures with different shapes and sizes can be obtained according to needs, actual requirements can be met, and large-scale industrial production can be realized.
Description
Technical Field
The invention relates to the technical field of preparation of air filtration and antibacterial composite structures, in particular to a method for preparing a nano silver wire composite grid and a method for manufacturing an antibacterial mask.
Background
With the progress of science and technology, people gradually recognize the threat of dust, fine particles, bacteria, viruses and other atmospheric floating objects and microorganisms to the health of human bodies, and the protective mask is produced. The protective mask can effectively isolate pollutants in the air, inhibit the propagation of harmful bacteria and viruses in public places and protect the health of people. In the prevention and treatment work of the novel coronary pneumonia in 2020, the protective mask becomes an important strategic material for protecting medical care personnel at the front line and controlling epidemic spread.
The medical mask commonly used at present is generally of a three-layer structure, and comprises an inner layer and an outer layer which are formed by spun-bonded non-woven fabrics and a middle layer filtering layer which is formed by melt-blown non-woven fabrics, but the mask has limited blocking and killing effects on harmful viruses and bacteria in the air. Adopt active carbon, PP filter paper, melt blown fiber cloth etc. to constitute the filter layer, can strengthen the protective effect of gauze mask, but along with the increase of filter layer, the gas permeability of gauze mask descends, is unfavorable for people's the experience of wearing. Therefore, the development of an antibacterial mask having high antibacterial and antiviral abilities and high air permeability has become an urgent problem to be solved.
The nano silver is particles with the particle size of 1-100nm, and due to the larger surface area and higher surface energy, the nano silver has higher antibacterial activity compared with simple substance silver, and can interfere the propagation of bacteria and viruses by releasing silver ions at a very low concentration, thereby achieving excellent antibacterial effect. The nano silver wire is used as a one-dimensional nano material of the metal silver, has better stability than nano silver particles in preparation, has better nesting and attaching effects with a supporting material, and is gradually applied to the field of antibacterial protection. However, the silver nanowire filtering, antimicrobial materials disclosed in the prior patents tend to have certain limitations. If the nano silver wires are directly attached to the supporting substrate in a spraying or printing mode, the obtained nano silver wire layer is often thin in thickness and sparse in structure, and cannot be fully contacted with various germs; and the flexibility and the air permeability of the material are reduced by excessively coating the nano silver wires or compounding other conductive materials. Therefore, there is a need to develop a novel filter material, and to improve the structure of the filter layer, so as to manufacture a protective mask having excellent antibacterial and antiviral functions and high air permeability.
Disclosure of Invention
Aiming at the technical problems, the invention discloses a high-air-permeability nano silver wire composite grid antibacterial mask and a manufacturing method thereof, so as to obtain better antibacterial and antiviral capabilities and wearing comfort.
In contrast, the technical scheme adopted by the invention is as follows:
the invention firstly provides a high-air-permeability nano silver wire composite grid antibacterial mask which is characterized by comprising a mask body and a strap, wherein the mask body comprises a multi-layer nano silver wire filtering layer and an upper supporting layer and a lower supporting layer which are positioned in the middle.
As a preferable technical scheme of the invention, the multilayer nano silver wire composite grid filtering layer forms a nano silver wire grid pattern on the supporting substrate in a transfer printing or printing mode.
As a preferable technical solution of the present invention, the silver nanowire filtering layer is formed on the upper surface or the upper and lower surfaces of the supporting substrate in a single-layer or multi-layer silver nanowire mesh pattern.
As a preferred technical scheme of the present invention, the surface of the silver nanowire mesh pattern may be coated with highly active adsorption or sterilization materials such as nano metal particles, carbon nanotubes, and graphene, and the connection and structural stability may be enhanced by means of heat treatment, pressurization, thermal irradiation, and the like.
The invention further provides a manufacturing method of the nano silver wire composite grid antibacterial mask, which comprises the following steps:
s1) growing a nano silver wire with the diameter of 60-150 nanometers and the length of 30-150 micrometers by adopting a liquid phase reduction method to prepare nano silver wire dispersion liquid;
s2) etching the glass sheet or the PI film by laser to form blind holes which are periodically arranged and used as a template for grid transfer printing;
s3) coating the silver nanowire obtained in the step S1 on the glass sheet or the PI film template obtained in the step S2 to form a silver nanowire grid pattern;
s4) coating the supporting substrate by using a viscous solution such as PVA and the like, and heating and drying;
s5) placing the support substrate obtained in S4 on the template with the silver nanowire mesh pattern in S3, and transferring the silver nanowire mesh pattern onto the support substrate by using a hot pressing process;
s6), non-woven fabrics, absorbent cotton gauze and the like are used as an upper supporting layer and a lower supporting layer, and the upper supporting layer and the lower supporting layer are bonded and fixed with the nano silver wire grid filtering layer obtained in S5 or S6 to form the nano silver wire composite grid antibacterial mask.
As a preferable aspect of the present invention, the S1) includes: ethylene glycol is used as a reducing agent and a solvent, PVP is used as a coating agent (preferably, the mixing mass ratio of PVP-360000 to PVP-58000 is 2:1), and CuCl2Or FeCl3The solution is used as a control agent, silver nitrate is used as a precursor, the reaction is carried out for 40min-5h in an oil bath pan at the temperature of 140-160 ℃, the nano silver wire with the average length of 50-100 mu m and the diameter of 80-150nm is prepared, and the nano silver wire is dispersed in ethanol for later use.
As a preferable aspect of the present invention, the S1) includes: 25mL-30mL of ethylene glycol is used as a reducing agent and a solvent, 0.2g-0.4g of PVP is used as a coating agent, wherein the PVP-360000 and the PVP-58000 are mixed in a mass ratio of 2:1, 4mL-4.5mL of 0.6mM-4mM CuCl2Or FeCl3The solution is a control agent, and 0.2g to 0.25g of silver nitrate is a precursor.
As a preferable aspect of the present invention, the S4) includes: coating 2 wt% PVA solution on a non-woven fabric support substrate, and drying at 60 ℃;
as a preferable aspect of the present invention, the S5) includes: attaching the silver nanowire pattern to a glass sheet with a silver nanowire pattern, and transferring the silver nanowire pattern to a support substrate by hot-pressing transfer printing with the parameters of 60 ℃, 3MPa and 10min to form a silver nanowire filter layer.
As a preferable aspect of the present invention, the S6) includes: repeating S3) -S5), carrying out hot-pressing and laminating on a plurality of supporting substrates with the nano-silver wire grid patterns to form a nano-silver wire multi-layer grid filtering layer, using non-woven fabrics, absorbent cotton gauze and the like as an upper supporting layer and a lower supporting layer, and laminating and fixing the non-woven fabrics, the absorbent cotton gauze and the like with the nano-silver wire grid filtering layer obtained in S5 or S6 to form the nano-silver wire composite grid antibacterial mask.
By adopting the technical scheme, the multilayer silver nanowire filter layer can enable harmful bacteria, viruses and the like to be fully contacted with the silver nanowires, so that the protective effect of the mask is enhanced, and the air permeability of the filter layer is enhanced by adopting the silver nanowire macroscopic grid patterns on the premise of ensuring the high conductivity of the silver nanowire filter layer and the high specific surface area of the silver nanowires, and the comfort of wearing the mask by people is improved.
Further, the multilayer nano silver wire composite grid filtering layer forms a nano silver wire grid pattern on the supporting substrate in a transfer printing or printing mode. By adopting the technical scheme, the preparation of the silver nanowire macroscopic grid structure on the supporting substrate can be realized by utilizing the auxiliary action of the template, and the proper silver nanowire grid pattern is obtained by adjusting the shape, size and interval of the template pattern, so that the silver nanowire is ensured to be fully contacted with pollutants in the air, and the integral air permeability of the filtering layer is also ensured.
As a further improvement of the invention, the nano silver wire filtering layer is formed on the upper surface or the upper and lower surfaces of the supporting substrate in a single-layer or multi-layer nano silver wire grid pattern. By adopting the technical scheme, the proper number of the nano silver wire filtering layers can be selected according to the requirement, and the adsorption, filtration, antibacterial and antiviral capabilities of the nano silver wire grid patterns are further improved.
As a further improvement of the invention, the surface of the silver nanowire grid pattern can be coated with high-activity adsorption or sterilization materials such as nano metal particles, carbon nano tubes and graphene, and the connection and structural stability can be enhanced by means of heat treatment, pressurization, thermal irradiation and the like. By adopting the technical scheme, the adsorption, filtration, antibacterial and antiviral capabilities of the nano silver wire filtering layer can be further improved, and the use stability of the obtained protective mask is improved.
The manufacturing process flow of the protective mask is simple, the requirements on environment and equipment are low, the structure of the silver nanowire grid pattern is controllable, and a template with the designed grid pattern can be directly processed by using a laser etching machine, so that the obtained silver nanowire grid pattern is flexibly transferred to an ideal supporting substrate by using a hot-pressing transfer process, and the silver nanowire grid pattern is quickly attached to the supporting substrate to manufacture the protective mask; meanwhile, the nano silver wire filter layer in the protective mask has the characteristics of light weight, good conductivity, large specific surface area, strong sterilization and virus resistance, strong air permeability, good structural and environmental stability and the like, and has obvious application advantages.
Compared with the prior art, the invention has the beneficial effects that:
firstly, the filtering layer with the nano silver wire grid structure in the protective mask obtained by the technical scheme of the invention has large specific surface area and strong activity, and the dense nano silver wire network in the protective mask can directly form a large amount of silver ions under the action of air and water vapor exhaled by a human body, thereby realizing excellent sterilization and antivirus performance; the design of the multilayer structure can further improve the adsorption capacity and killing effect of the material on micro-nano particles, bacteria and viruses on the premise of not losing the air permeability of the material; the air permeability is strong: the design of the macroscopic grid structure of the nano silver wires can ensure the free circulation of air and improve the wearing comfort of the mask; meanwhile, the structural stability is good, and the deformation requirement of daily use can be met.
Second, the conventional process generally increases the antibacterial property of the silver nanowire film by increasing the thickness of the silver nanowire film, but the increase of the thickness increases the mass of the silver nanowire film, and the silver nanowire film has obvious rigidity or brittleness and is easy to break or fall off. The invention adopts the multilayer nano silver wire grid structure filter layer to replace a single-layer nano silver wire filter layer, on one hand, the nano silver wires can be limited in the grid area, thereby improving the use efficiency of the nano silver wires and the integral air permeability of the filter layer. On the other hand, the nano silver wires in the multilayer structure can be effectively utilized through the structural design, so that the overall quality of the filtering membrane is reduced on the premise of not losing the antibacterial effect, and the structure has obvious structural advantages.
Thirdly, the technical scheme of the invention is based on the template method to prepare the silver nanowire mesh pattern, the template with the corresponding pattern can be flexibly obtained by etching only by changing the graphic file of the required pattern, and then the silver nanowire mesh pattern is transferred to the supporting substrate in a hot-pressing transfer printing mode.
Drawings
Fig. 1 is a schematic structural diagram of a three-layer nano silver wire antibacterial mask provided by the invention.
Fig. 2 is a schematic diagram of a preparation process of the nano silver wire composite mesh filter layer.
Detailed Description
The following is a more detailed description of preferred embodiments of the invention and the accompanying drawings, but the invention is not limited thereto.
Example 1
Referring to fig. 1 and 2, a single-layer nano silver wire circular grid antibacterial mask is prepared by the following steps:
(1) ethylene glycol (30mL) is used as a reducing agent and a solvent, PVP (0.4g) is used as a coating agent (the mass ratio of PVP-360000 to PVP-58000 is 2:1), and CuCl2The solution (4.5mL, 4mM) is used as a control agent, silver nitrate (0.2g) is used as a precursor, the reaction is carried out for 40min in an oil bath pan at 160 ℃, the nano silver wire with the average length of 50 mu m and the diameter of 80-100nm is prepared, and the nano silver wire is dispersed in ethanol for standby.
(2) And (3) cutting by utilizing laser to obtain a copper plate mould (with the thickness of 0.3mm) with circular grids, pouring turnover silica gel (with the hardness of 60), and demoulding after the turnover silica gel is solidified to obtain the silica gel mould plate with particles.
(3) And (3) tightly attaching the silica gel template to the glass sheet, injecting nano silver wire dispersion liquid into the grid area, and drying at 60 ℃ to obtain the nano silver wire circular grid pattern on the glass sheet.
(4) Coating a PVA aqueous solution (2 wt%) on a non-woven fabric support substrate, drying at 60 ℃, attaching the non-woven fabric support substrate with the PVA aqueous solution and a glass sheet with a nano silver wire pattern, and transferring the nano silver wire pattern onto the support substrate through hot-pressing transfer printing (60 ℃, 3MPa and 10min) to form the nano silver wire filtering layer.
(5) The obtained nano silver wire circular grid filter screen is attached between two layers of non-woven fabrics or other skin-friendly fabrics, and a tensioning belt is installed by sewing and bonding methods to form the high-permeability nano silver wire circular grid antibacterial mask.
The nano silver wire circular grid antibacterial mask obtained by the embodiment has strong conductive capability, and has effective physical barrier and antibacterial and bactericidal effects on micro-nano particle pollutants, bacteria, mold, viruses and other pollutants in the air; on the other hand, the circular grid of the nano silver wires in the filter screen has a mesh hole area without the nano silver wires, so that the filter screen is strong in air circulation capacity, good in wearing experience, not easy to completely block and long in service life, and has obvious application and performance advantages compared with the existing nano silver wire filter layer structure.
Example 2
Referring to fig. 1 and 2, a protective mask with a three-layer nano silver wire square grid structure is prepared by the following steps:
(1) ethylene glycol (25mL) is used as a reducing agent and a solvent, PVP (0.2g) is used as a coating agent, and FeCl3The solution (4mL, 0.6mM) is used as a control agent, silver nitrate (0.25g) is used as a precursor, the reaction is carried out for 5 hours in a polytetrafluoroethylene reaction kettle at the temperature of 140 ℃, nano silver wires with the average length of 100 mu m and the diameter of 80-150nm are prepared, and the nano silver wires are dispersed in ethanol for later use.
(2) Etching a series of periodic square blind holes on a glass sheet by using an ultraviolet laser etching machine, and coating the nano silver wire dispersion liquid on the glass sheet with the blind holes to form a nano silver wire film.
(3) Coating PVA aqueous solution (2 wt%) on a non-woven fabric support substrate, drying at 60 ℃, attaching the non-woven fabric support substrate with the PVA aqueous solution and a glass sheet with a nano silver wire pattern, and transferring the nano silver wire pattern onto the support substrate through hot-pressing transfer printing (60 ℃, 3MPa and 10 min).
(4) And (4) repeating the steps (2) and (3), and pressing the 3 supporting substrates with the square patterns of the nano silver wires together to form three layers of filtering layers with the square grid structures of the nano silver wires.
(5) The obtained silver nanowire square grid filter screen is attached between two layers of non-woven fabrics or other skin-friendly fabrics, and a tensioning belt is installed by sewing and bonding methods to form the high-permeability three-layer silver nanowire square grid antibacterial mask.
Compared with the antibacterial mask obtained in the embodiment 1, the three-layer nano silver wire square grid antibacterial mask obtained in the embodiment has a stronger antibacterial effect, and realizes more effective physical separation and antibacterial and bactericidal effects on micro-nano particle pollutants, bacteria, mold, viruses and other pollutants existing in the air by means of a multi-layer nano silver wire grid structure. This protective facial mask uses multilayer grid structure as the filter layer, when improving its antibacterial capacity, because the existence of net hole has strengthened the circulation ability of air, has improved protective facial mask's gas permeability, therefore helps improving the experience sense of people when wearing antibacterial facial mask for a long time.
Comparative example 1
A nano silver wire antibacterial mask comprises a mask body and a strap, wherein the mask body comprises an upper layer of supporting base fabric and a lower layer of supporting base fabric, and the middle layer is a nano silver wire air filter screen sterilization layer; the upper layer supporting base fabric and the lower layer supporting base fabric are non-woven fabric filter layers; the upper layer of supporting base fabric is provided with an outer surface layer, and the lower layer of supporting base fabric is provided with an inner surface layer, and the manufacturing method comprises the following steps:
(1) growing a nano silver wire by a chemical method, adding nano silver particles, and mixing the nano silver particles with a special coating liquid to prepare nano silver wire ink;
(2) printing or coating nano silver ink on a supporting net;
(3) carrying out heat treatment on the nano silver wire filtering membrane by adopting an oven at about 200 ℃ or strong light irradiation;
(4) after thermosetting to form a film, a multi-layer net-shaped woven three-dimensional structure is formed.
(5) And (4) attaching and fixing the upper and lower supporting nets to form the nano silver wire air filter screen.
(6) And sewing/attaching and fixing the upper and lower supporting base fabrics.
(7) And sewing/attaching and fixing the outer surface layer and the inner surface layer to form the nano silver wire antibacterial mask.
Under the process condition of the embodiment, the nano silver wires and the nano particle ink are sintered into a multi-layer network woven three-dimensional structure in a multi-printing and high-temperature sintering mode. However, the process of this embodiment is complex, multiple printing and curing are required to form the filtering membrane after the nanowire synthesis, and as the thickness of the nano silver wire layer increases, the air circulation capacity after printing is reduced, and the whole air permeability of the mask is reduced. Furthermore, a planar sintered body is easily obtained by a multilayer printing and sintering method, but the rigidity and brittleness of the obtained printed structure are increased, so that the printed structure is broken or fractured and loses antibacterial and antiviral abilities. In conclusion, the invention has obvious process and performance advantages compared with the comparative example.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. The utility model provides a high gas permeability nanometer silver line compound grid antibacterial mask which characterized in that, antibacterial mask includes gauze mask body and area rope, the gauze mask body is including the multilayer nanometer silver line filter layer and upper and lower two-layer supporting layer that are located the centre.
2. The high-breathability nano silver wire composite grid antibacterial mask according to claim 1, characterized in that: the multilayer nano silver wire composite grid filter layer forms a nano silver wire grid pattern on a support substrate in a transfer printing or printing mode.
3. The high-breathability nano silver wire composite grid antibacterial mask according to claim 1, characterized in that: the nano silver wire filtering layer is formed on the upper surface or the upper and lower surfaces of the supporting substrate in a single-layer or multi-layer nano silver wire grid pattern mode.
4. The high-breathability nano silver wire composite grid antibacterial mask according to claim 1, characterized in that: the surface of the silver nanowire grid pattern can be coated with high-activity adsorption or sterilization materials such as nano metal particles, carbon nano tubes and graphene, and the connection and structural stability can be enhanced by means of heat treatment, pressurization, thermal irradiation and the like.
5. The method for manufacturing the nano silver wire composite grid antibacterial mask according to any one of claims 1 to 4, which is characterized by comprising the following steps of:
s1) growing a nano silver wire with the diameter of 60-150 nanometers and the length of 30-150 micrometers by adopting a liquid phase reduction method to prepare nano silver wire dispersion liquid;
s2) etching the glass sheet or the PI film by laser to form blind holes which are periodically arranged and used as a template for grid transfer printing;
s3) coating the silver nanowire obtained in the step S1 on the glass sheet or the PI film template obtained in the step S2 to form a silver nanowire grid pattern;
s4) coating the supporting substrate by using a viscous solution such as PVA and the like, and heating and drying;
s5) placing the support substrate obtained in S4 on the template with the silver nanowire mesh pattern in S3, and transferring the silver nanowire mesh pattern onto the support substrate by using a hot pressing process;
s6), non-woven fabrics, absorbent cotton gauze and the like are used as an upper supporting layer and a lower supporting layer, and the upper supporting layer and the lower supporting layer are bonded and fixed with the nano silver wire grid filtering layer obtained in S5 or S6 to form the nano silver wire composite grid antibacterial mask.
6. The method for manufacturing the silver nanowire composite mesh antibacterial mask as claimed in claim 5, wherein the S1) comprises: glycol is used as a reducing agent and a solvent, PVP is used as a coating agent, and CuCl2Or FeCl3The solution is used as a control agent, silver nitrate is used as a precursor, the reaction is carried out for 40min-5h in an oil bath pan at the temperature of 140-160 ℃, the nano silver wire with the average length of 50-100 mu m and the diameter of 80-150nm is prepared, and the nano silver wire is dispersed in ethanol for later use.
7. The method for manufacturing the antibacterial mask with composite grids of nano silver wires according to claim 7, wherein the step S1) comprises the following steps: the mixing mass ratio of PVP-360000 to PVP-58000 in the coating agent is 2: 1.
8. The method for manufacturing the antibacterial mask with composite grids of nano silver wires according to claim 7, wherein the step S1) comprises the following steps: 25mL-30mL of ethylene glycol is used as a reducing agent and a solvent, 0.2g-0.4g of PVP is used as a coating agent, wherein the PVP-360000 and the PVP-58000 are mixed in a mass ratio of 2:1, 4mL-4.5mL of 0.6mM-4mM CuCl2Or FeCl3The solution is a control agent, and 0.2g to 0.25g of silver nitrate is a precursor.
9. The method for manufacturing the silver nanowire composite mesh antibacterial mask as claimed in claim 5, wherein the S1) comprises: the S4) includes: coating 2 wt% PVA solution on a non-woven fabric support substrate, and drying at 60 ℃; the S5) includes: attaching the silver nanowire pattern to a glass sheet with a silver nanowire pattern, and transferring the silver nanowire pattern to a support substrate by hot-pressing transfer printing with the parameters of 60 ℃, 3MPa and 10min to form a silver nanowire filter layer.
10. The method for manufacturing the silver nanowire composite mesh antibacterial mask as claimed in claim 5, wherein the S6) comprises: repeating S3) -S5), carrying out hot-pressing and laminating on a plurality of supporting substrates with the nano-silver wire grid patterns to form a nano-silver wire multi-layer grid filtering layer, using non-woven fabrics, absorbent cotton gauze and the like as an upper supporting layer and a lower supporting layer, and laminating and fixing the non-woven fabrics, the absorbent cotton gauze and the like with the nano-silver wire grid filtering layer obtained in S5 or S6 to form the nano-silver wire composite grid antibacterial mask.
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| CN111557501B (en) | 2022-12-27 |
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