CN110656491A - Nano silver wire antibacterial composite material and preparation method thereof - Google Patents
Nano silver wire antibacterial composite material and preparation method thereof Download PDFInfo
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- CN110656491A CN110656491A CN201910941496.5A CN201910941496A CN110656491A CN 110656491 A CN110656491 A CN 110656491A CN 201910941496 A CN201910941496 A CN 201910941496A CN 110656491 A CN110656491 A CN 110656491A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/06—Coating with compositions not containing macromolecular substances
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/673—Inorganic compounds
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/02—Metal coatings
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
- D06M2101/06—Vegetal fibres cellulosic
Abstract
The invention relates to the technical field of preparation of antibacterial composite materials, and the technical scheme of the invention is as follows: a nanometer silver line antibacterial composite material and its preparation method, the said nanometer silver line antibacterial composite material includes layer substrate and nanometer silver line layer, the said nanometer silver line layer adopts nanometer silver line ink to coat or print on the upper surface of the said layer substrate, the said layer substrate is cotton cloth or paper; the thickness of nanometer silver line layer is within 1 um. The nano silver wires are interwoven into a net, so that the nano silver wires are not easy to release to pollute the environment; the nano silver wire layer printed and coated on the cotton cloth or paper is directly contacted with skin or food, thereby achieving the best sterilization effect.
Description
Technical Field
The invention relates to the technical field of preparation of antibacterial composite materials, in particular to a nano silver wire antibacterial composite material and a preparation method thereof.
Background
The nano silver has good bactericidal effect, is a powdery silver simple substance, has the particle size of less than 100nm, and is generally between 10 and 50 nm. The nano silver particles can be directly combined with oxygen metabolizing enzyme (-SH) of the thallus, so that the unique action mechanism of the thallus is that the thallus is suffocated, and most of microbes such as bacteria, fungi, mildew, spores and the like which are contacted with the nanometer silver particles can be killed. More than 650 bacteria can be killed within a few minutes. Has strong inhibiting and killing effects on dozens of pathogenic microorganisms such as escherichia coli, gonococcus, chlamydia trachomatis and the like, and can not generate drug resistance. The smaller the particle size, the stronger the bactericidal performance.
Fresh foods such as fish, shrimp and meat are easily polluted by bacteria in the environment, and the fresh keeping is difficult. The traditional plastic bag with a common plastic film for preservation can not prevent bacterial breeding, and the environmental plastic pollution is serious, Chinese patent CN104005303A discloses a nano-silver composite antibacterial paper, a manufacturing method and application thereof, wherein a silver nitrate soaking mode is used to make nano-silver particles attach to the paper, which is obviously unreasonable, even if the nano-silver particles attach to the paper, the nano-silver particles are easy to separate out or drop out, the plastic film is replaced by the antibacterial preservation paper containing nano-silver, so that the plastic bag can not only preserve food with antibiosis, but also avoid the environmental plastic pollution, the nano-silver particles adsorbed in the paper are easy to separate out, can also have certain influence on ecology when released into the environment, and can also kill beneficial bacteria in the environment. The nano silver particles separated out by long-term contact can form silver deposition in organisms, and can generate adverse effects on organisms and human bodies, and even obvious poisoning phenomena can be caused by excessive deposition.
The antibacterial cotton cloth containing the nano silver can effectively protect wounds and prevent bacteria from breeding, is widely applied to the field of medical and health products such as wound dressings, bandages, antibacterial bed sheets and cushions, female sanitary towels and the like, adopts nano silver particles as antibacterial components in the prior art, such as Chinese patent CN107151861A, but the nano silver particles adsorbed in cotton cloth fibers are easy to separate out, can have certain influence on ecology when released into the environment, and can kill beneficial bacteria in the environment. The nano silver particles separated out by long-term contact can form silver deposition in organisms, and can generate adverse effects on organisms and human bodies, and even obvious poisoning phenomena can be caused by excessive deposition.
Disclosure of Invention
The invention aims to provide a nano silver wire antibacterial composite material and a preparation method thereof.
The technical purpose of the invention is realized by the following technical scheme:
the nano silver wire antibacterial composite material comprises a layer of base material and a nano silver wire layer, wherein the nano silver wire layer is coated or printed on the upper surface of the layer of base material by adopting nano silver wire ink.
As a preferred scheme of the nano silver wire antibacterial composite material, the layer base material is cotton cloth or paper or aluminum foil or plastic film.
As an optimal scheme of the nano silver wire antibacterial composite material, the thickness of the nano silver wire layer is within 1 um.
A method for preparing a nano silver wire antibacterial composite material comprises the following steps:
s1, growing a nano silver wire with the diameter of 10-100 nanometers and the length of 10-1000um by a chemical method, and mixing the nano silver wire with the coating liquid to prepare the nano silver wire ink, wherein the concentration of the nano silver wire ink is 0.1-0.3%.
S2, printing or coating the nano silver wire ink on cotton cloth or paper under pressure, wherein the thickness is within 1 um;
s3, carrying out heat treatment on the nano silver wire layer by adopting an oven at about 200 ℃ or strong light irradiation, and forming a multi-layer net-shaped woven three-dimensional structure after heat curing and film forming, wherein the mesh size is distributed within 100 um.
In conclusion, the invention has the following beneficial effects:
1. the nano silver wires are interwoven into a net, so that the nano silver wires are not easy to release to pollute the environment;
2. the nano silver wire layer printed and coated on the cotton cloth or paper is directly contacted with skin or food, so that the optimal sterilization effect can be achieved;
3. can print patterns, improve the appearance, reduce the consumption of the nano silver wires and reduce the cost.
4. The nano silver wire layer has high ductility, can permeate into the surface of cotton cloth or paper, and is not easy to fall off when being folded, curled and crumpled along with the cotton cloth or paper.
Drawings
Fig. 1 is a schematic structural diagram of a nano silver wire antibacterial composite material provided by the invention.
The corresponding part names indicated by the numbers and letters in the drawings:
wherein: 1-a layer of substrate; 2-layer of nanosilver.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the invention is further described with reference to the figures and the specific embodiments.
As shown in fig. 1, the antibacterial composite material of silver nanowires provided by the invention comprises a layer substrate and a silver nanowire layer, wherein the silver nanowire layer is coated or printed on the upper surface of the layer substrate by using silver nanowire ink.
Preferably, the thickness of the layer of silver nanowires is within 1 um.
The first embodiment is as follows:
the layer base material is cotton cloth, the upper surface of the cotton cloth is coated or printed with a nano silver layer, and patterns can also be printed on the surface of the cotton cloth, so that the appearance is improved, and the using amount of the nano silver lines is reduced; the nano silver wire layer has high ductility, can permeate into the surface of the cotton cloth, is used for covering wounds, can kill bacteria and prevent bacterial infection, and is not easy to fall off along with folding, curling and crumpling of the cotton cloth.
Example two:
the layer base material is paper, a nano silver line layer is coated or printed on the upper surface of the paper, and nano silver line pattern and patterns can also be printed on the surface of the paper, so that the appearance is improved, and the using amount of nano silver lines is reduced; the nano silver wire layer has high ductility, can permeate into the surface of paper, is not easy to fall off along with the folding, curling and crumpling of the paper, and can kill bacteria and delay the decay of food by placing washable food on the nano silver wire layer to coat the nano silver wire layer.
Example three:
the layer base material is an aluminum foil, a nano silver line layer is coated or printed on the upper surface of the aluminum foil, and nano silver line pattern and patterns can also be printed on the surface of the aluminum foil, so that the appearance is improved, and the using amount of nano silver lines is reduced; the nano silver wire layer has high ductility, is not easy to fall off along with paper aluminum foil folding, curling and crumpling, can kill bacteria when being coated, and has excellent isolation performance, so that the corrosion resistance and the freshness preservation performance are more excellent.
Example four:
the layer substrate is a plastic film, a nano silver line layer is coated or printed on the upper surface of the plastic film, and nano silver line pattern can also be printed on the surface of the plastic film, so that the appearance is improved, and the using amount of nano silver lines is reduced; the nano silver wire layer has high ductility, is not easy to fall off along with the folding, curling and crumpling of the plastic film, can kill bacteria and improve the fresh-keeping capacity after being coated. It should be noted that when the layer substrate is a plastic film, the thermal treatment method of strong light irradiation is preferably used for the thermal treatment of the silver nanowire layer, and the plastic film is not easy to deform.
A method for preparing a nano silver wire antibacterial composite material comprises the following steps:
s1, growing a nano silver wire with the diameter of 10-100 nanometers and the length of 10-1000um by a chemical method, and mixing the nano silver wire with the coating liquid to prepare the nano silver wire ink, wherein the concentration of the nano silver wire ink is 0.1-0.3%.
S2, printing or coating the nano silver wire ink on cotton cloth or paper under pressure, wherein the thickness is within 1 um;
s3, carrying out heat treatment on the nano silver wire layer by adopting an oven at about 200 ℃ or strong light irradiation, and forming a multi-layer net-shaped woven three-dimensional structure after heat curing and film forming, wherein the mesh size is distributed within 100 um.
In the above technical solution, the purpose of the heat treatment in step S3 is to remove components such as the binder and the coating agent; meanwhile, contact points among the nano silver wires can be fused and crosslinked together in the heat treatment process, after the nano silver wires are thermally cured to form a film, a multi-layer net-shaped woven three-dimensional structure can be formed, the mesh size is approximately distributed within 100um, the extensibility is good, the concentration of the nano silver wires in the ink can be adjusted to adjust the mesh size, and the nano silver wire layer is higher in transparency and lower in antibacterial ability when the mesh is larger.
It should be noted that the coating liquid used in the present invention can refer to the production process of a transparent conductive film with silver nanowires proposed in the reference "201611245540.1", wherein the preparation method of the coating liquid with silver nanowires is as follows: dissolving a nano silver wire with the diameter of 10-100 nm and the length of less than or equal to 200 mu m in sol with the solid content of 0.5-10 wt% and the average particle size of 10-100 nm, so that 1-10 g of silver is contained in every 1Kg of nano silver wire coating liquid; the solid content of the nano silver wire coating liquid is 0.5-11 wt%, the viscosity is 1-25 cps, and the coating amount of the nano silver wire coating is 10-50 mL/m 2.
It should be noted that, preferably, in order to obtain the nano silver wire layers with different thicknesses, the nano silver wire layers can be obtained by multiple coating or printing, and can also be obtained by changing different proportions of the nano silver wire ink, and the nano silver wire ink adopted in the present invention can also refer to "a method for preparing conductive ink for a high-precision RFID antenna" disclosed in the reference CN 106883686A.
The surface migration of the nano silver wire generates recrystallization, which can occur at about 150-200 ℃, and the fusion between the nano silver wires is realized. The dissociation temperature of the organic matter on the surface of the nano silver wire is 160-. Therefore, the heat treatment after coating can be carried out by adopting an oven with the temperature of about 200 ℃.
The strong light irradiation heating technology realizes the local melting and welding of the lap joint of the nanometer silver wire grids in the film layer, and the technology can avoid the damage of the whole heating treatment to the flexible substrate.
The principle of intense light irradiation heating (also referred to as "irradiation-technology fusion welding" in some places) is to melt the junction by inducing ion resonance on the surface of the nano silver wire and generating a high-intensity electric field at the junction. The heat effect generated at the joint is greatly higher than that of other parts of the film layer, and the film can be suitable for the flexible base material which does not resist temperature. The light source can be selected from common light sources or lasers, and the common light sources have the advantages of low equipment requirement and simplicity in operation, and generally require 1-2 minutes.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The nano-silver wire antibacterial composite material is characterized by comprising a layer of base material and a nano-silver wire layer, wherein the nano-silver wire layer is coated or printed on the upper surface of the layer of base material by adopting nano-silver wire ink.
2. The silver nanowire antibacterial composite material of claim 1, wherein: the layer of base material is cotton cloth or paper or aluminum foil or plastic film.
3. The silver nanowire antibacterial composite material of claim 1, wherein: the thickness of nanometer silver line layer is within 1 um.
4. A method for manufacturing the nano silver wire antibacterial composite material according to any one of claims 1 to 3, characterized by comprising the following steps:
s1, growing a nano silver wire with the diameter of 10-100 nanometers and the length of 10-1000um by a chemical method, and mixing the nano silver wire with the special coating liquid to prepare the nano silver wire ink, wherein the concentration of the nano silver wire ink is 0.1-0.3%.
S2, printing or coating the nano silver wire ink on cotton cloth or paper under pressure, wherein the thickness is within 1 um;
s3, carrying out heat treatment on the nano silver wire layer by adopting an oven at about 200 ℃ or strong light irradiation, and forming a multi-layer net-shaped woven three-dimensional structure after heat curing and film forming, wherein the mesh size is distributed within 100 um.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910941496.5A CN110656491A (en) | 2019-09-30 | 2019-09-30 | Nano silver wire antibacterial composite material and preparation method thereof |
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| CN201910941496.5A CN110656491A (en) | 2019-09-30 | 2019-09-30 | Nano silver wire antibacterial composite material and preparation method thereof |
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| CN110656491A true CN110656491A (en) | 2020-01-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111440346A (en) * | 2020-03-12 | 2020-07-24 | 深圳市华科创智技术有限公司 | Nano-silver wire antibacterial layer and nano-silver wire anti-mask |
| CN111557501A (en) * | 2020-05-18 | 2020-08-21 | 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) | High-breathability nano silver wire composite grid antibacterial mask and manufacturing method thereof |
-
2019
- 2019-09-30 CN CN201910941496.5A patent/CN110656491A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111440346A (en) * | 2020-03-12 | 2020-07-24 | 深圳市华科创智技术有限公司 | Nano-silver wire antibacterial layer and nano-silver wire anti-mask |
| CN111557501A (en) * | 2020-05-18 | 2020-08-21 | 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) | High-breathability nano silver wire composite grid antibacterial mask and manufacturing method thereof |
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Application publication date: 20200107 |