CN111572151A - Antibacterial heat-insulating material composite film and preparation method thereof - Google Patents

Antibacterial heat-insulating material composite film and preparation method thereof Download PDF

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Publication number
CN111572151A
CN111572151A CN202010274022.2A CN202010274022A CN111572151A CN 111572151 A CN111572151 A CN 111572151A CN 202010274022 A CN202010274022 A CN 202010274022A CN 111572151 A CN111572151 A CN 111572151A
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antibacterial
layer
protective layer
composite film
film
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袁培震
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Vast Union Guangzhou Packaging Co ltd
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Vast Union Guangzhou Packaging Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/302—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Plant Pathology (AREA)
  • Inorganic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses an antibacterial heat-insulating material composite membrane and a preparation method thereof.A antibacterial layer is added on the basis of the original building film, so that the antibacterial property is improved besides the problem of heat insulation of an outer wall and a roof of a building is effectively solved, and the antibacterial heat-insulating material composite membrane has a strong inactivation effect on escherichia coli and staphylococcus aureus and a strong inactivation effect on avian influenza virus.

Description

Antibacterial heat-insulating material composite film and preparation method thereof
Technical Field
The invention relates to the technical field of heat-insulating material laminated films, in particular to an antibacterial heat-insulating material composite film and a preparation method thereof.
Background
Along with the improvement of living standard of people, the requirements of people on sanitation and health are higher and higher. Of the 3 thousands of bacteria found, a significant portion is pathological. Therefore, the disinfection and the sterilization of civil products and the cleaning of living environment are the basic guarantee of human health.
Most of the existing heat-insulating material laminating films in the market are polyester films laminated with refractory materials such as rock wool, rubber and plastic and the like, and the antibacterial performance of the laminating films gradually cannot meet the requirement of the building market on the antibacterial performance of the laminating films.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an antibacterial heat-insulating material composite film and a preparation method thereof.
The purpose of the invention is realized by adopting the following technical scheme:
an antibacterial heat-insulating material composite film comprises an antibacterial layer, a first protective layer, a reflecting layer and a second protective layer which are compounded from top to bottom, wherein an antibacterial material is coated on the first protective layer to form the antibacterial layer; the first protective layer and the reflecting layer and the second protective layer are bonded through a bonding agent; the reflecting layer is a metal reflecting layer; the antibacterial material comprises the following components in percentage by mass: 60-80% of silver nitrate solution, 4-7% of reducing agent, 1-5% of film-forming agent, 1-5% of dispersing agent, 1-5% of plasticizer and 10-20% of star anise extract; wherein the reducing agent is at least one of N, N-dimethylethanolamine, methyldiethanolamine and triethanolamine.
The invention adds the antibacterial layer on the basis of the original building film, so that the antibacterial heat-insulating material composite film has obvious antibacterial performance, after the silver nitrate solution and the reducing agent are prepared into the nano-silver solution, the film-forming agent, the dispersing agent, the plasticizer and the star anise extract are added to form the antibacterial layer on the first protective layer, and the nano-silver can strongly inhibit and kill dozens of pathogenic microorganisms such as escherichia coli, gonococcus, chlamydia trachomatis and the like. The star anise extract is also added, and the shikimic acid component contained in the star anise extract can effectively kill the avian influenza virus. The reducing agent can reduce silver ions into atomic silver on one hand; on the other hand, the reducing agent can be coated on the surface of the nano silver particles to prevent the nano silver particles from agglomerating and precipitating, the better the symmetry of the reducing agent molecular structure is, and the tighter the coating is, so that the resistance of agglomeration of the nano silver particles can be increased.
Further, the concentration of silver nitrate in the silver nitrate solution is 0.01-0.05 mol/L.
Still further, the material of the first protective layer is polyethylene terephthalate, and the material of the second protective layer is polyethylene. Polyethylene terephthalate (PET) has the advantages of high tensile strength, high elastic modulus, high impact strength and the like, and can be applied to the field of buildings.
Further, the film forming agent is a composition of dihydric phosphate, nitrate and polyvinylpyrrolidone, and the combination ratio is 6:1: 1. The polyvinylpyrrolidone can also be used as a protective agent of a silver nitrate solution and a reducing agent, and the combination of the polyvinylpyrrolidone, the silver nitrate solution and the reducing agent can ensure that the particle size of the nano-silver particles in the nano-silver solution is small and the nano-silver particles are uniformly distributed.
Still further, the binder is anti-aging glue, and the plasticizer comprises one or more of polyethylene glycol, glycerol, butyl oleate, ethyl citrate and phthalate.
Further, the metal reflecting layer is an aluminum foil. The aluminum foil can solve the heat insulation problem of the building surface as the metal reflecting layer, when the surface temperature rises due to the fact that heat energy impacts the aluminum foil, the aluminum foil is extremely low in emissivity and only can radiate a small amount of heat energy, so that the indoor environment temperature is kept comfortable, and the burden of indoor air conditioning equipment is reduced due to the low environment temperature, and therefore energy is greatly saved.
The preparation method of the antibacterial heat-insulating material composite membrane comprises the following steps:
1) firstly, the first protective layer (polyethylene terephthalate layer) and the reflecting layer (aluminum foil) are bonded by anti-aging glue and then cured for 1-2h at 35-45 ℃;
2) welding the other surface of the first protective layer (polyethylene terephthalate layer) cured in the step 1) with the antibacterial layer; the antibacterial layer is prepared by adopting a tape casting method, a silver nitrate solution and a reducing agent react for 20-30min at 30-50 ℃, then a film-forming agent, a dispersing agent, a plasticizer and an aniseed extract are added, mixed and defoamed in vacuum, then tape-casting is carried out to form a film, and then drying and curing are carried out; wherein the welding temperature is 50-80 ℃.
3) And (3) bonding the other surface of the reflection layer cured in the step 2) with a second protective layer through a bonding agent, and curing at 35-45 ℃ for 1-2h to obtain the antibacterial heat-insulating material composite film.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adds the antibacterial layer on the basis of the original building film, can effectively solve the heat insulation problem of the building outer wall and the roof, also improves the antibacterial performance, has strong inactivation effect on escherichia coli and staphylococcus aureus, and also has strong inactivation effect on avian influenza virus;
2. the first protection layer does not need to be subjected to plating treatment, the antibacterial layer can be directly welded on the surface of the first protection layer, the prepared antibacterial heat-insulating material composite film does not need to be cleaned, the prepared antibacterial heat-insulating material composite film has high reliability and long thermal cycle life, and the heat dissipation efficiency is enhanced.
Detailed Description
The present invention is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.
Example 1
An antibacterial heat-insulating material composite film comprises an antibacterial layer, a first protective layer, a reflecting layer and a second protective layer which are compounded from top to bottom, wherein an antibacterial material is coated on the first protective layer to form the antibacterial layer; the first protective layer is a PET layer, and the second protective layer is a PE layer; the first protective layer and the reflecting layer and the second protective layer are bonded through a bonding agent; the reflecting layer is made of aluminum foil; the antibacterial material comprises the following components in percentage by mass: 60g of silver nitrate solution, 7g of reducing agent, 5g of film forming agent, 3g of dispersing agent, 5g of plasticizer and 20g of star anise extract; wherein the reducing agent is at least one of N, N-dimethylethanolamine, methyldiethanolamine and triethanolamine. The binder is anti-aging glue. Namely, the structure of the antibacterial heat-insulating material composite film is an antibacterial layer/polyethylene terephthalate (PET) layer/anti-aging glue/aluminum foil/anti-aging glue/Polyethylene (PE) layer.
Specifically, the silver nitrate solution is an aqueous solution of silver nitrate, and the concentration of the silver nitrate in the silver nitrate solution is 0.05 mol/L. The film forming agent is a composition of dihydric phosphate, nitrate and polyvinylpyrrolidone, and the combination ratio is 6:1: 1. The plasticizer is polyethylene glycol. Wherein, the polyvinylpyrrolidone can reduce the surface energy of nano silver ions in a sound field and prevent the nano silver ions from agglomerating and precipitating.
In the embodiment, the reducing agent can reduce silver ions to atomic silver on one hand; on the other hand, the reducing agent can be coated on the surface of the nano silver particles to prevent the nano silver particles from agglomerating and precipitating, the better the symmetry of the reducing agent molecular structure is, and the tighter the coating is, so that the resistance of agglomeration of the nano silver particles can be increased.
The preparation method of the antibacterial heat-insulating material composite membrane comprises the following steps:
1) firstly, after a first protective layer (polyethylene terephthalate layer) and a reflecting layer (aluminum foil) are attached through anti-aging glue, curing is carried out for 2 hours at 35 ℃;
2) welding the other surface of the first protective layer (polyethylene terephthalate layer) cured in the step 1) with the antibacterial layer; the antibacterial layer is prepared by adopting a tape casting method, a silver nitrate solution and a reducing agent react for 30min at 30 ℃, then a film-forming agent, a dispersing agent, a plasticizer and an aniseed extract are added and mixed at a stirring speed of 400rpm, vacuum defoaming is carried out, then tape casting is carried out to form a film, and drying and curing are carried out; wherein the temperature of the soldering is 50 ℃.
3) And (3) bonding the other surface of the reflection layer cured in the step 2) with a second protective layer through a bonding agent, and curing at 35 ℃ for 2h to obtain the antibacterial heat-insulating material composite film.
Wherein, the thickness of the PET layer is 5mm, the thickness of the antibacterial layer is 0.10mm, and the thickness of the PE layer is 0.80 mm.
Example 2
An antibacterial heat-insulating material composite film comprises an antibacterial layer, a first protective layer, a reflecting layer and a second protective layer which are compounded from top to bottom, wherein an antibacterial material is coated on the first protective layer to form the antibacterial layer; the first protective layer is a PET layer, and the second protective layer is a PE layer; the first protective layer and the reflecting layer and the second protective layer are bonded through a bonding agent; the reflecting layer is made of aluminum foil; the antibacterial material comprises the following components in percentage by mass: 70g of silver nitrate solution, 6g of reducing agent, 3g of film forming agent, 3g of dispersing agent, 3g of plasticizer and 15g of star anise extract; wherein the reducing agent is at least one of N, N-dimethylethanolamine, methyldiethanolamine and triethanolamine. The binder is anti-aging glue. Namely, the structure of the antibacterial heat-insulating material composite film is an antibacterial layer/polyethylene terephthalate (PET) layer/anti-aging glue/aluminum foil/anti-aging glue/Polyethylene (PE) layer.
In the embodiment, the reducing agent can reduce silver ions to atomic silver on one hand; on the other hand, the reducing agent can be coated on the surface of the nano silver particles to prevent the nano silver particles from agglomerating and precipitating, the better the symmetry of the reducing agent molecular structure is, and the tighter the coating is, so that the resistance of agglomeration of the nano silver particles can be increased.
Specifically, the silver nitrate solution is an aqueous solution of silver nitrate, and the concentration of the silver nitrate in the silver nitrate solution is 0.04 mol/L. The film forming agent is a composition of dihydric phosphate, nitrate and polyvinylpyrrolidone, and the combination ratio is 6:1: 1. The plasticizer is glycerol. Wherein, the polyvinylpyrrolidone can reduce the surface energy of nano silver ions in a sound field and prevent the nano silver ions from agglomerating and precipitating.
The preparation method of the antibacterial heat-insulating material composite membrane comprises the following steps:
1) firstly, the first protective layer (polyethylene terephthalate layer) and the reflecting layer (aluminum foil) are bonded by anti-aging glue and then are cured for 1.5 hours at the temperature of 40 ℃;
2) welding the other surface of the first protective layer (polyethylene terephthalate layer) cured in the step 1) with the antibacterial layer; the antibacterial layer is prepared by adopting a tape casting method, a silver nitrate solution and a reducing agent react for 25min at 40 ℃, then a film-forming agent, a dispersing agent, a plasticizer and an aniseed extract are added and mixed at a stirring speed of 450rpm, vacuum defoaming is carried out, then tape casting is carried out to form a film, and drying and curing are carried out; wherein the temperature of the soldering is 60 ℃.
3) And (3) bonding the other surface of the reflection layer cured in the step 2) with a second protective layer through a bonding agent, and curing at 40 ℃ for 1.5h to obtain the antibacterial heat-insulating material composite film.
Wherein, the thickness of the PET layer is 6mm, the thickness of the antibacterial layer is 0.13mm, and the thickness of the PE layer is 0.77 mm.
Example 3
An antibacterial heat-insulating material composite film comprises an antibacterial layer, a first protective layer, a reflecting layer and a second protective layer which are compounded from top to bottom, wherein an antibacterial material is coated on the first protective layer to form the antibacterial layer; the first protective layer is a PET layer, and the second protective layer is a PE layer; the first protective layer and the reflecting layer and the second protective layer are bonded through a bonding agent; the reflecting layer is made of aluminum foil; the antibacterial material comprises the following components in percentage by mass: 80g of silver nitrate solution, 4g of reducing agent, 2g of film forming agent, 2g of dispersing agent, 2g of plasticizer and 10g of star anise extract; wherein the reducing agent is at least one of N, N-dimethylethanolamine, methyldiethanolamine and triethanolamine. The binder is anti-aging glue. Namely, the structure of the antibacterial heat-insulating material composite film is an antibacterial layer/polyethylene terephthalate (PET) layer/anti-aging glue/aluminum foil/anti-aging glue/Polyethylene (PE) layer.
In the embodiment, the reducing agent can reduce silver ions to atomic silver on one hand; on the other hand, the reducing agent can be coated on the surface of the nano silver particles to prevent the nano silver particles from agglomerating and precipitating, the better the symmetry of the reducing agent molecular structure is, and the tighter the coating is, so that the resistance of agglomeration of the nano silver particles can be increased.
Specifically, the silver nitrate solution is an aqueous solution of silver nitrate, and the concentration of the silver nitrate in the silver nitrate solution is 0.01 mol/L. The film forming agent is a composition of dihydric phosphate, nitrate and polyvinylpyrrolidone, and the combination ratio is 6:1: 1. The plasticizer is polyethylene glycol. Wherein, the polyvinylpyrrolidone can reduce the surface energy of nano silver ions in a sound field and prevent the nano silver ions from agglomerating and precipitating.
The preparation method of the antibacterial heat-insulating material composite membrane comprises the following steps:
1) firstly, a first protective layer (polyethylene terephthalate layer) and a reflecting layer (aluminum foil) are bonded through anti-aging glue and then are cured for 1h at the temperature of 45 ℃;
2) welding the other surface of the first protective layer (polyethylene terephthalate layer) cured in the step 1) with the antibacterial layer; the antibacterial layer is prepared by adopting a tape casting method, a silver nitrate solution and a reducing agent react for 20min at 50 ℃, then a film-forming agent, a dispersing agent, a plasticizer and an aniseed extract are added and mixed at a stirring speed of 500rpm, vacuum defoaming is carried out, then tape casting is carried out to form a film, and drying and curing are carried out; wherein the temperature of the soldering is 80 ℃.
3) And (3) bonding the other surface of the reflection layer cured in the step 2) with a second protective layer through a bonding agent, and curing at 45 ℃ for 1h to obtain the antibacterial heat-insulating material composite film.
Wherein, the thickness of the PET layer is 5mm, the thickness of the antibacterial layer is 0.11mm, and the thickness of the PE layer is 0.70 mm.
Comparative example 1
Comparative example 1 no additive, other components and preparation method were the same as example 1.
Comparative example 2
Comparative example 2 the anise star anise extract was not added and the other ingredients and preparation method were the same as in example 1.
The antibacterial insulation composite films of examples 1 to 3 and comparative examples 1 to 2 were cut into 50X 50mm pieces, and the antibacterial effect was measured according to the film-sticking method specified in QB/T2591-2003, "method for testing antibacterial property of antibacterial plastic", and the test results are shown in Table 1.
Table 1 antibacterial test results of the antibacterial insulation composite film of the present invention
Figure BDA0002444145350000081
As can be seen from the data in Table 1, the inactivation rates of the examples 1-3 to Escherichia coli and Staphylococcus aureus all reach 99%, and the inactivation rates of Escherichia coli and Staphylococcus aureus are obviously reduced because the nano silver particles generated in the comparative example 1 are not uniform due to the absence of the reducing agent. Comparative example 2 no illicium verum extract is added, the inactivation rate of the avian influenza virus is greatly reduced, which shows that the illicium verum extract has stronger inactivation effect on the avian influenza virus.
The antibacterial layer of the antibacterial heat-insulating material composite membrane prepared by the invention is the outermost layer, so that the composite membrane is suitable for indoor use, and application places can be used on indoor wall surfaces in hospitals, schools, offices and the like, and the composite membrane can play a role in heat insulation, can also have a good inactivation effect on escherichia coli, staphylococcus aureus and avian influenza viruses, and can ensure the health of users.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (10)

1. The composite film of the antibacterial heat-insulating material is characterized by comprising an antibacterial layer, a first protective layer, a reflecting layer and a second protective layer which are compounded from top to bottom, wherein the antibacterial material is coated on the first protective layer to form the antibacterial layer; the first protective layer and the reflecting layer and the second protective layer are bonded through a bonding agent; the reflecting layer is a metal reflecting layer; the antibacterial material comprises the following components in percentage by mass: 60-80% of silver nitrate solution, 4-7% of reducing agent, 1-5% of film-forming agent, 1-5% of dispersing agent, 1-5% of plasticizer and 10-20% of star anise extract; wherein the reducing agent is at least one of N, N-dimethylethanolamine, methyldiethanolamine and triethanolamine.
2. The composite film as claimed in claim 1, wherein the concentration of silver nitrate in the silver nitrate solution is 0.01-0.05 mol/L.
3. The composite antibacterial thermal insulation material film as claimed in claim 1, wherein the first protective layer is made of polyethylene terephthalate and the second protective layer is made of polyethylene.
4. The composite film of antibacterial thermal insulation material according to claim 1, wherein the film-forming agent is a composition of dihydrogen phosphate, nitrate and polyvinylpyrrolidone, and the combination ratio is 6:1: 1.
5. The composite film as claimed in claim 1, wherein the binder is an anti-aging glue, and the plasticizer comprises one or more of polyethylene glycol, glycerol, butyl oleate, ethyl citrate and phthalate.
6. The composite film as claimed in claim 1, wherein the metal reflective layer is an aluminum foil.
7. A method for preparing a composite film of antibacterial and thermal insulating material according to any one of claims 1 to 6, characterized by comprising the following steps:
1) firstly, the first protective layer and the reflecting layer are bonded through a bonding agent and then are cured;
2) welding the other surface of the first protective layer cured in the step 1) with the antibacterial layer;
3) and (3) bonding the other surface of the reflection layer cured in the step 2) with a second protective layer through a bonding agent, and curing to obtain the antibacterial heat-insulating material composite film.
8. The antibacterial heat-insulating material composite film according to claim 7, wherein in the step 1) and the step 3), the curing temperature is 35-45 ℃ and the curing time is 1-2 h.
9. The composite film as claimed in claim 7, wherein in step 2), the antibacterial layer is prepared by tape casting, the silver nitrate solution and the reducing agent are mixed and reacted, then the film-forming agent, the dispersing agent, the plasticizer and the aniseed extract are added and mixed, vacuum defoaming is carried out, then tape casting is carried out to form a film, and drying and curing are carried out; wherein the welding temperature is 50-80 ℃.
10. The composite film as claimed in claim 9, wherein the silver nitrate solution reacts with the reducing agent at 30-50 ℃ for 20-30 min.
CN202010274022.2A 2020-04-09 2020-04-09 Antibacterial heat-insulating material composite film and preparation method thereof Pending CN111572151A (en)

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Application publication date: 20200825