CN113429882B - Antibacterial easy-to-clean tableware coating and preparation method and application thereof - Google Patents

Antibacterial easy-to-clean tableware coating and preparation method and application thereof Download PDF

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CN113429882B
CN113429882B CN202110701011.2A CN202110701011A CN113429882B CN 113429882 B CN113429882 B CN 113429882B CN 202110701011 A CN202110701011 A CN 202110701011A CN 113429882 B CN113429882 B CN 113429882B
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coating
mass
parts
tableware
easy
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CN113429882A (en
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伍尚华
吴洋洋
黄民忠
刘炳耀
欧剑华
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Guangdong Odro Kitchenware Co ltd
Guangdong University of Technology
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Guangdong Odro Kitchenware Co ltd
Guangdong University of Technology
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    • 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
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/16—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers in which all the silicon atoms are connected by linkages other than oxygen atoms
    • 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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • 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
    • B05D7/24—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 for applying particular liquids or other fluent materials
    • 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
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/53—Base coat plus clear coat type
    • B05D7/536—Base coat plus clear coat type each layer being cured, at least partially, separately
    • 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
    • C09D5/002—Priming paints
    • 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
    • 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
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure

Abstract

The embodiment of the invention discloses an antibacterial easy-cleaning tableware coating and a preparation method and application thereof, and relates to the technical field of coating materials. The antibacterial easy-cleaning tableware coating comprises a primary coating and a top coating, wherein the primary coating is prepared from a primary coating, and the top coating is prepared from a top coating; wherein the base coating comprises the following components in parts by mass: 10-50 parts by mass of organic polysilazane; 50-90 parts by mass of inorganic polysilazane; 0.5-3 parts by mass of a defoaming agent; the top coating paint comprises the following components in parts by mass: 50-90 parts by mass of organic polysilazane; 10-50 parts by mass of inorganic polysilazane; 1-10 parts by mass of nano titanium dioxide particles; 0.5-3 parts by mass of a defoaming agent. The antibacterial easy-cleaning tableware coating prepared by the invention has the advantages of bacteriostasis, easy cleaning, wear resistance, high temperature resistance, excellent adhesive force, non-stick property and the like.

Description

Antibacterial easy-to-clean tableware coating and preparation method and application thereof
Technical Field
The invention relates to the technical field of coating materials, in particular to an antibacterial easy-cleaning tableware coating and a preparation method and application thereof.
Background
For a long time, people use the traditional tableware to cook food, but the food is often found to be stuck to a pot in the cooking process, so that scorching is generated, inconvenience is brought to cooking, and the cleaning difficulty of the tableware is increased. At present, the main mode for solving the problem of non-stick pan is to coat a polytetrafluoroethylene coating on the traditional tableware, but the polytetrafluoroethylene coating has poor strength and wear resistance, is easy to fall off, and decomposition products of the polytetrafluoroethylene coating can cause cancer at high temperature. And along with the improvement of living standard, the requirements of people on sanitary safety are higher and higher, and the demand of tableware with antibacterial performance is higher and higher, but most of tableware in the current market does not have the antibacterial effect.
Disclosure of Invention
The invention aims to provide a bacteriostatic tableware coating easy to clean, which is used for overcoming the defects of poor strength, poor wear resistance, easy falling and the like of a polytetrafluoroethylene coating and simultaneously ensuring that the tableware coating has a bacteriostatic effect.
In order to solve the above problem, the embodiment of the present invention provides the following technical solutions:
in a first aspect, the embodiment of the invention provides an antibacterial easy-to-clean tableware coating, which comprises a primary coating and a top coating, wherein the primary coating is prepared from a primary coating, and the top coating is prepared from a top coating; wherein the base coating comprises the following components in parts by mass:
10-50 parts by mass of organic polysilazane;
50-90 parts by mass of inorganic polysilazane;
0.5-3 parts by mass of a defoaming agent;
the top coating paint comprises the following components in parts by mass:
Figure BDA0003124910790000011
the further technical scheme is that the defoaming agent is at least one of emulsified silicone oil, a high-alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether and polyoxyethylene polyoxypropylene amine ether.
The further technical scheme is that the particle size of the nano titanium dioxide particles is 10-50 nm.
The further technical scheme is that the thickness of the bottom coating is 10-20 mu m, and the thickness of the top coating is 20-30 mu m.
In a second aspect, the present invention provides a method for preparing a bacteriostatic easy-to-clean tableware coating according to the first aspect, including:
spraying a primary coating on the surface of the tableware, and obtaining a primary coating after a curing step;
and spraying a top-coat paint on the surface of the bottom-coat paint, and curing to obtain the top-coat paint.
The further technical proposal is that the step of curing the bottom coating is to cure at 20-25 ℃ and 60-80% relative humidity.
The further technical scheme is that the surface coating layer is cured by firstly curing at 20-25 ℃ and 60-80% relative humidity and then post-curing at 200-300 ℃ and 60-80% relative humidity.
The further technical scheme is that the curing time of the bottom coating is 12-24 hours.
The further technical scheme is that the first curing time of the top coating is 12-24 hours, and the post-curing time is 12-24 hours.
In a third aspect, embodiments of the present invention provide the use of a bacteriostatic easy-to-clean dishware coating as described in the first aspect in dishware.
Compared with the prior art, the embodiment of the invention can achieve the following technical effects:
the antibacterial easy-cleaning tableware coating provided by the embodiment of the invention fully utilizes the characteristics of low hardness, hydrophobicity and the like of organic polysilazane and the characteristics of high hardness, hydrophilicity and the like of inorganic polysilazane, and has excellent comprehensive properties of transparency, compactness, high hardness, good adhesive force, wear resistance, high temperature resistance, corrosion resistance, easy cleaning, good hydrophobic property and the like; meanwhile, the nano titanium dioxide is added into the top coating, so that the top coating has an antibacterial effect; the defoaming agent is added into the coating, so that the generation of bubbles in the coating preparation process can be reduced, the coating is more compact, and the adhesive force between the coating and the substrate is increased. Therefore, the antibacterial easy-cleaning tableware coating prepared by the invention has the advantages of bacteriostasis, easy cleaning, wear resistance, high temperature resistance, excellent adhesive force and non-stick property and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a bacteriostatic easy-to-clean tableware coating provided by an embodiment of the invention;
fig. 2 is a bacteriostatic rate test result graph of the bacteriostatic easy-cleaning tableware coating provided in example 2 of the present invention.
Reference numerals
Tableware 10, a primary coating 20 and a top coating 30.
Detailed Description
The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, wherein like reference numerals represent like elements in the drawings. It is apparent that the embodiments to be described below are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the embodiments of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments of the invention. As used in the description of embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Referring to fig. 1, the embodiment of the present invention provides a bacteriostatic easy-to-clean tableware coating, and as can be seen from the figure, the bacteriostatic easy-to-clean tableware coating comprises a bottom coating 20 and a top coating 30. The bacteriostatic easy-to-clean tableware coating is applied to the tableware 10. The thickness of the primary coating 20 is 10-20 μm, and the thickness of the top coating 30 is 20-30 μm.
Specifically, the undercoat coating 20 is prepared from an undercoat paint that includes, in parts by mass:
10-50 parts by mass of organic polysilazane;
50-90 parts by mass of inorganic polysilazane;
0.5-3 parts by mass of a defoaming agent.
The topcoat coating 30 is prepared from a topcoat paint including, in parts by mass:
Figure BDA0003124910790000041
further, the defoaming agent is at least one of emulsified silicone oil, a higher alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether and polyoxyethylene polyoxypropylene amine ether. The defoaming agent is a food-grade defoaming agent.
Furthermore, the particle size of the nano titanium dioxide particles is 10-50 nm.
The embodiment of the invention provides a preparation method of the bacteriostatic easy-cleaning tableware coating, which comprises the following steps of S1-S2.
S1, spraying the base coating on the surface of the tableware, and obtaining the base coating after the curing step.
In specific implementation, the step of curing the base coat is to cure at 20-25 ℃ and 60-80% relative humidity. The curing time of the primary coating is 12-24 hours.
And S2, spraying a top coating on the surface of the primary coating, and curing to obtain the top coating.
In the concrete implementation, the curing step of the top coating is to perform first curing at 20-25 ℃ and 60-80% relative humidity and then perform post-curing at 200-300 ℃ and 60-80% relative humidity. The first curing time of the top coating is 12-24 hours, and the post-curing time is 12-24 hours.
The embodiment of the invention provides application of the bacteriostatic easy-cleaning tableware coating in tableware.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The following examples all use stainless steel sheets as experimental tableware to verify the performance of the bacteriostatic easy-to-clean tableware coating of the present invention. In practical applications, the tableware material may be aluminum, cast iron, and other common tableware materials, which is not limited in the present invention.
Example 1
The bacteriostatic tableware coating easy to clean consists of a primary coating and a surface coating, wherein the thickness of the primary coating is 15 microns, the thickness of the surface coating is 25 microns, a stainless steel sheet subjected to sand blasting is ultrasonically cleaned for 5 minutes by alcohol before being sprayed, and the stainless steel sheet is dried and then cooled to room temperature.
The base coat is obtained by spraying and then curing a base coat paint, wherein the base coat paint is formed by mixing 10 parts by mass of organic polysilazane, 90 parts by mass of inorganic polysilazane and 1 part by mass of a defoaming agent, the paint is sprayed on the surface of tableware, and the tableware is cured for 12 hours at 20 ℃ and 60% relative humidity.
The top-coat coating is obtained by spraying and then curing a top-coat coating, wherein the top-coat coating is formed by mixing 10 parts by mass of inorganic polysilazane, 90 parts by mass of organic polysilazane, 5 parts by mass of nano titanium dioxide particles and 1 part by mass of a defoaming agent, the coating is sprayed on the surface of the bottom-coat coating, and is cured for 12 hours at 20 ℃ and 60% relative humidity, and then is cured for 12 hours at 200 ℃ to 300 ℃ and 60% to 80% relative humidity.
Example 2
The bacteriostatic tableware coating easy to clean consists of a primary coating and a surface coating, wherein the thickness of the primary coating is 15 microns, the thickness of the surface coating is 25 microns, a stainless steel sheet subjected to sand blasting is ultrasonically cleaned for 5 minutes by alcohol before being sprayed, and the stainless steel sheet is dried and then cooled to room temperature.
The base coat is obtained by spraying and then curing a base coat paint, wherein the base coat paint is formed by mixing 15 parts by mass of organic polysilazane, 85 parts by mass of inorganic polysilazane and 1 part by mass of a defoaming agent, the paint is sprayed on the surface of tableware, and the tableware is cured for 12 hours at 20 ℃ and 60% relative humidity.
The top-coat coating is obtained by spraying and then curing a top-coat coating, wherein the top-coat coating is formed by mixing 15 parts by mass of inorganic polysilazane, 85 parts by mass of organic polysilazane, 5 parts by mass of nano titanium dioxide particles and 1 part by mass of a defoaming agent, the coating is sprayed on the surface of the bottom-coat coating, and is cured for 12 hours at 20 ℃ and 60% relative humidity, and then is cured for 12 hours at 200 ℃ to 300 ℃ and 60% to 80% relative humidity.
Example 3
The bacteriostatic tableware coating easy to clean consists of a primary coating and a surface coating, wherein the thickness of the primary coating is 15 microns, the thickness of the surface coating is 25 microns, a stainless steel sheet subjected to sand blasting is ultrasonically cleaned for 5 minutes by alcohol before being sprayed, and the stainless steel sheet is dried and then cooled to room temperature.
The base coat is obtained by spraying and then curing a base coat paint, wherein the base coat paint is prepared by mixing 40 parts by mass of organic polysilazane, 60 parts by mass of inorganic polysilazane and 1 part by mass of a defoaming agent, the paint is sprayed on the surface of tableware, and the tableware is cured for 12 hours at 20 ℃ and 60% relative humidity.
The top-coat coating is obtained by spraying and then curing a top-coat coating, wherein the top-coat coating is prepared by mixing 40 parts by mass of inorganic polysilazane, 60 parts by mass of organic polysilazane, 5 parts by mass of nano titanium dioxide particles and 1 part by mass of a defoaming agent, the coating is sprayed on the surface of the bottom-coat coating, and is cured for 12 hours at 20 ℃ and 60% relative humidity, and then is cured for 12 hours at 200 ℃ to 300 ℃ and 60% to 80% relative humidity.
Example 4
The bacteriostatic tableware coating easy to clean consists of a bottom coating and a top coating, wherein the thickness of the bottom coating is 10 microns, the thickness of the top coating is 30 microns, a stainless steel sheet subjected to sand blasting is ultrasonically cleaned for 5 minutes by alcohol before being sprayed, and the stainless steel sheet is dried and then cooled to room temperature.
The base coat is obtained by spraying and then curing a base coat paint, wherein the base coat paint is formed by mixing 15 parts by mass of organic polysilazane, 85 parts by mass of inorganic polysilazane and 1 part by mass of a defoaming agent, the paint is sprayed on the surface of tableware, and the tableware is cured for 12 hours at 20 ℃ and 60% relative humidity.
The top-coat coating is obtained by spraying and then curing a top-coat coating, wherein the top-coat coating is formed by mixing 15 parts by mass of inorganic polysilazane, 85 parts by mass of organic polysilazane, 5 parts by mass of nano titanium dioxide particles and 1 part by mass of a defoaming agent, the coating is sprayed on the surface of the bottom-coat coating, and is cured for 12 hours at 20 ℃ and 60% relative humidity, and then is cured for 12 hours at 200 ℃ to 300 ℃ and 60% to 80% relative humidity.
Example 5
The bacteriostatic tableware coating easy to clean consists of a bottom coating and a top coating, wherein the thickness of the bottom coating is 10 microns, the thickness of the top coating is 30 microns, a stainless steel sheet subjected to sand blasting is ultrasonically cleaned for 5 minutes by alcohol before being sprayed, and the stainless steel sheet is dried and then cooled to room temperature.
The base coat is obtained by spraying and then curing a base coat paint, wherein the base coat paint is prepared by mixing 30 parts by mass of organic polysilazane, 70 parts by mass of inorganic polysilazane and 1 part by mass of a defoaming agent, the paint is sprayed on the surface of tableware, and the tableware is cured for 12 hours at 20 ℃ and 60% relative humidity.
The top-coat coating is obtained by spraying and then curing a top-coat coating, wherein the top-coat coating is formed by mixing 15 parts by mass of inorganic polysilazane, 85 parts by mass of organic polysilazane, 5 parts by mass of nano titanium dioxide particles and 1 part by mass of a defoaming agent, the coating is sprayed on the surface of the bottom-coat coating, and is cured for 12 hours at 20 ℃ and 60% relative humidity, and then is cured for 12 hours at 200 ℃ to 300 ℃ and 60% to 80% relative humidity.
Example 6
The bacteriostatic tableware coating easy to clean consists of a bottom coating and a top coating, wherein the thickness of the bottom coating is 10 microns, the thickness of the top coating is 30 microns, a stainless steel sheet subjected to sand blasting is ultrasonically cleaned for 5 minutes by alcohol before being sprayed, and the stainless steel sheet is dried and then cooled to room temperature.
The base coat is obtained by spraying and then curing a base coat paint, wherein the base coat paint is prepared by mixing 50 parts by mass of organic polysilazane, 50 parts by mass of inorganic polysilazane and 1 part by mass of a defoaming agent, the paint is sprayed on the surface of tableware, and the tableware is cured for 12 hours at 20 ℃ and 60% relative humidity.
The top-coat coating is obtained by spraying and then curing a top-coat coating, wherein the top-coat coating is formed by mixing 50 parts by mass of inorganic polysilazane, 50 parts by mass of organic polysilazane, 5 parts by mass of nano titanium dioxide particles and 1 part by mass of a defoaming agent, the coating is sprayed on the surface of the bottom-coat coating, and is cured for 12 hours at 20 ℃ and 60% relative humidity, and then is cured for 12 hours at 200 ℃ to 300 ℃ and 60% to 80% relative humidity.
Comparative example 1
The bacteriostatic tableware coating easy to clean consists of a primary coating and a surface coating, wherein the thickness of the primary coating is 15 microns, the thickness of the surface coating is 25 microns, a stainless steel sheet subjected to sand blasting is ultrasonically cleaned for 5 minutes by alcohol before being sprayed, and the stainless steel sheet is dried and then cooled to room temperature.
The base coat is obtained by spraying and then curing a base coat paint, wherein the base coat paint is formed by mixing 15 parts by mass of organic polysilazane, 85 parts by mass of inorganic polysilazane and 1 part by mass of a defoaming agent, the paint is sprayed on the surface of tableware, and the tableware is cured for 12 hours at 20 ℃ and 60% relative humidity.
The top-coat coating is obtained by spraying and then curing a top-coat coating, wherein the top-coat coating is formed by mixing 15 parts by mass of inorganic polysilazane, 85 parts by mass of organic polysilazane, 3 parts by mass of nano titanium dioxide particles and 1 part by mass of a defoaming agent, the coating is sprayed on the surface of the bottom-coat coating, and is cured for 12 hours at 20 ℃ and 60% relative humidity, and then is cured for 12 hours at 200 ℃ to 300 ℃ and 60% to 80% relative humidity.
Comparative example 2
The bacteriostatic easy-to-clean tableware coating consists of bottom coating layer of 15 micron thickness and top coating layer of 25 micron thickness, and the stainless steel sheet after sand blasting treatment is ultrasonically cleaned with alcohol for 5 min before being painted, stoved and cooled to room temperature.
The base coat is obtained by spraying and then curing a base coat paint, wherein the base coat paint is formed by mixing 15 parts by mass of organic polysilazane, 85 parts by mass of inorganic polysilazane and 1 part by mass of a defoaming agent, the paint is sprayed on the surface of tableware, and the tableware is cured for 12 hours at 20 ℃ and 60% relative humidity.
The top-coat coating is obtained by spraying and then curing a top-coat coating, wherein the top-coat coating is formed by mixing 15 parts by mass of inorganic polysilazane, 85 parts by mass of organic polysilazane, 7 parts by mass of nano titanium dioxide particles and 1 part by mass of a defoaming agent, the coating is sprayed on the surface of the bottom-coat coating, and is cured for 12 hours at 20 ℃ and 60% relative humidity, and then is cured for 12 hours at 200 ℃ to 300 ℃ and 60% to 80% relative humidity.
Performance testing
The tableware coatings prepared in the above examples and comparative examples are subjected to performance tests, and the hardness tests are carried out on the tableware coatings according to the GB/T6739-; testing the contact angle of the tableware coating by using a contact angle measuring instrument; carrying out adhesion test on the tableware coating by referring to a GB/T9286-1998 detection method and a detection standard; and the bacteriostatic performance of the tableware coating is tested, the bacteriostatic performance of the tableware coating is evaluated by a bacteriostatic circle method in the test method, and the relevant test standard is from AATCC90-1982 'antibacterial fiber determination method-plate culture medium method'. The test results are shown in table 1 and fig. 2.
Table 1:
hardness of Contact angle Adhesion force
Example 1 With slight indentation 109.85° Level 1
Example 2 Without defects 103.71° Level 1
Example 3 Without defects 98.54° Level 1
Example 4 Without defects 104.58° Stage 2
Example 5 Without defects 102.85° Stage 2
Example 6 Without defects 93.47° Stage 2
Comparative example 1 Without defects 103.65° Level 1
Comparative example 2 Without defects 103.82° Stage 2
As can be seen from the above Table 1, the tableware coating prepared by the invention has higher hardness, only the tableware coating prepared in the example 1 has slight indentation, and still has good hydrophobicity and adhesive force after being treated at the high temperature of 200-300 ℃ for 12 hours; it can be seen from example 2 and comparative examples 1 and 2 that the adhesion of the dish coating is significantly reduced after increasing the content of titanium dioxide in the top-coating layer. Fig. 2 shows the bacteriostatic rate of the bacteriostatic coating containing 5 parts by mass of nano titanium dioxide in example 2 under the irradiation of light, and it can be seen that the bacteriostatic rate of the tableware coating reaches 97% after 2 hours of light irradiation, which shows excellent antibacterial property. Therefore, under the condition of ensuring the physical properties of the coating in all aspects and simultaneously ensuring the antibacterial performance, the nano titanium dioxide particles with proper content can be added into the top coating paint.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, while the invention has been described with respect to the above-described embodiments, it will be understood that the invention is not limited thereto but may be embodied with various modifications and changes.
While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (7)

1. The bacteriostatic easy-cleaning tableware coating is characterized by comprising a primary coating and a top coating, wherein the primary coating is prepared from a primary coating, and the top coating is prepared from a top coating; wherein the base coating comprises the following components in parts by mass:
10-50 parts by mass of organic polysilazane;
50-90 parts by mass of inorganic polysilazane;
0.5-3 parts by mass of a defoaming agent;
the top coating paint comprises the following components in parts by mass:
Figure FDA0003532139800000011
the preparation method of the antibacterial easy-cleaning tableware coating comprises the following steps:
spraying a base coat paint on the surface of the tableware, and obtaining the base coat paint after the curing step;
spraying a top-coat paint on the surface of the primary coat, and obtaining a top-coat after a curing step;
the curing step of the primary coating is to cure at 20-25 ℃ and 60-80% relative humidity;
the surface coating layer is cured through the first curing at 20-25 deg.c and 60-80% relative humidity and the subsequent curing at 200-300 deg.c and 60-80% relative humidity.
2. The bacteriostatic easy-cleaning tableware coating according to claim 1, wherein the defoaming agent is at least one of silicone emulsion, higher alcohol fatty acid ester complex, polyoxyethylene polyoxypropylene pentaerythritol ether and polyoxyethylene polyoxypropylene amine ether.
3. The bacteriostatic easy-cleaning tableware coating according to claim 1, wherein the particle size of the nano titanium dioxide particles is 10-50 nm.
4. The bacteriostatic easy-cleaning tableware coating according to claim 1, wherein the thickness of the primary coating is 10-20 μm, and the thickness of the top coating is 20-30 μm.
5. The bacteriostatic easy-to-clean tableware coating according to claim 1, wherein the curing time of the primary coating is 12-24 hours.
6. The bacteriostatic easy-to-clean tableware coating according to claim 1, wherein the first curing time of the top coating is 12-24 hours, and the post-curing time is 12-24 hours.
7. Use of a bacteriostatic easy-to-clean dishware coating according to any one of claims 1-4 in dishware.
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