Antibacterial heat-insulating coating based on aerogel powder and preparation method

Abstract

The invention relates to the technical field of aerogel antibacterial heat-insulating coatings, aerogel antibacterial heat-insulating patches and aerogel antibacterial heat-insulating plates, in particular to an antibacterial heat-insulating layer based on aerogel powder and antibacterial powder and a preparation method. The invention relates to an antibacterial thermal insulation material, which is a material capable of resisting bacteria and blocking part of heat transfer, can inactivate bacteria entering the material, and has a thermal insulation effect at the same time. The defects that a carbon-series antibacterial material is poor in heat insulation performance and has no flexibility are overcome. A common polymer antibacterial coating can only resist bacteria and cannot insulate heat. The multi-layer composite antibacterial heat-insulating coating prepared by matching with aerogel powder has an antibacterial function and also has a heat-insulating effect. The method has a good application prospect in the fields of medical instruments and micro-electronics at present.

Description

Technical Field

[0001] The present invention relates to the technical field of aerogel antibacterial thermal insulation coatings, aerogel antibacterial thermal insulation patches and aerogel antibacterial thermal insulation boards, in particular to an antibacterial thermal insulation layer based on aerogel powder and antibacterial powder and a preparation method thereof. Background Art

[0002] Antibacterial thermal insulation materials refer to a type of material that can be antibacterial and block some heat transfer at the same time. It can inactivate bacteria that enter the material.

[0003] Antibacterial insulation materials can be roughly divided into silicon-based, carbon-based, ceramic-based and antibacterial polymer materials.

[0004] Aerogel antimicrobial insulation, with its unique three-dimensional morphology and antimicrobial properties, provides an excellent barrier against bacteria and microorganisms. It combines the advantages of both antimicrobial polymers and carbon-based antimicrobial materials, boasting low density, customizable microstructures, high antimicrobial efficiency, excellent thermal insulation, and adjustable thermal insulation parameters. It overcomes the shortcomings of carbon-based antimicrobial materials, such as poor insulation and lack of flexibility. In particular, aerogel antimicrobial insulation boasts superior dispersibility compared to other antimicrobial insulation materials, providing a key antimicrobial insulation material for the development of a new generation of lightweight, highly effective, antimicrobial thermal insulation coatings.

[0005] Aerogel antibacterial thermal insulation coatings have a high antibacterial rate, but their single antibacterial mechanism limits their practical applications. In particular, ordinary polymer antibacterial coatings can only be antibacterial but not thermally insulating, so it is difficult to achieve both antibacterial and thermally insulating properties. To solve the above problems, two strategies are usually adopted: one is to compound with antibacterial particles, such as silver powder, iodine powder and their compounds, to introduce antibacterial properties and improve the thermal insulation properties of the material. This method has a simple preparation process and can improve the antibacterial and thermal insulation effects, but due to the poor thermal insulation effect of ordinary polymer coatings, it is very easy to conduct heat. When antibacterial properties are required for special components, integrated thermal insulation is not possible, which seriously restricts the thermal insulation properties of the material. Another strategy is to rationally design a multi-layer antibacterial thermal insulation coating so that the material has multi-interface antibacterial and thermal insulation characteristics, which currently has good application prospects in the field of medical devices.

[0006] Existing antibacterial coatings are generally single-design, and the antibacterial effect of a single functional coating is limited and can only be used alone. It cannot meet the requirements of antibacterial insulation and other applications that require antibacterial insulation.

[0007] We provide an antibacterial and thermal insulation coating based on aerogel powder and a preparation method to solve the above-mentioned problems. Summary of the Invention

[0008] The purpose of the present invention is to provide a heat-insulating, antibacterial and heat-insulating coating based on aerogel powder and a preparation method thereof, so as to solve the problems in the background technology.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] The multilayer antibacterial thermal insulation coating based on aerogel powder is characterized in that it includes a surface layer, an intermediate layer and a bottom layer, the surface layer is made of epoxy resin or soluble polymer; the intermediate layer and the bottom layer include epoxy resin or soluble polymer, aerogel powder, silver powder, iodine powder, dispersant, defoaming agent, and curing agent. The epoxy resin or soluble polymer is used as the base material, and aerogel powder, silver powder, iodine powder or a combination of the three is used as the antibacterial thermal insulation medium. The required dispersant, defoaming agent or curing agent is selected to prepare the required antibacterial thermal insulation coating, and the multilayer antibacterial thermal insulation coating is produced by roller coating.

[0011] The preparation method of the antibacterial thermal insulation coating based on aerogel powder comprises the following steps: Step 1, adding epoxy resin, solvent and additive into a dispersion tank and stirring at high speed for 15 minutes;

[0012] Step 2: Add the functional filler and stir evenly, and disperse at high speed for 15 minutes;

[0013] Step 3: Place the dispersed material into a sand mill and grind it to a fineness of less than 5 μm;

[0014] Step 4: Transfer the ground material into a paint mixing kettle, add additives and stir at medium speed for 5-10 minutes until it is uniform;

[0015] Step 5: Adjust the viscosity of the evenly stirred material. After the adjustment is completed, the required coating is obtained. After the finished product is tested for qualified performance, it is filtered and packaged.

[0016] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions: In one optional solution: the solvent is selected as diluent X-9 type.

[0017] In an optional solution: the functional filler is selected from aerogel powder, silver powder, iodine powder or bentonite.

[0018] In an optional solution, the copper powder is 300-500 mesh copper powder.

[0019] In an optional solution, the auxiliary agent is a wetting and dispersing agent or a defoaming agent.

[0020] In an optional solution, the wetting and dispersing agent is BYK-188 type wetting and dispersing agent.

[0021] In an optional solution, the defoaming agent is XQ-AD D 249.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention adopts a multi-layer design, with aerogel powder, silver powder and iodine powder participating in the surface layer, middle layer and bottom layer, thereby preventing some heat loss and resisting bacteria, further achieving heat insulation and antibacterial effects at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the process flow of the present invention.

[0025] Figure 2 This is the image of aerogel powder (transmission electron microscope) in the present invention.

[0026] Figure 3 This is a schematic diagram of the structure of the double-layer heat-insulating and antibacterial coating of epoxy resin-aerogel powder and silver powder in the present invention.

[0027] Figure 4 This is a schematic diagram of the structure of the three-layer heat-insulating and antibacterial coating of epoxy resin-aerogel powder, silver powder, and iodine powder in the present invention.

[0028] Figure 5 This is a schematic diagram of the structure of the three-layer heat-insulating and antibacterial coating of epoxy resin-aerogel powder, silver powder, and iodine powder in the present invention. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0030] like Figure 5 As shown, the antibacterial and thermal insulation coating based on aerogel powder includes a surface layer, an intermediate layer, and a bottom layer. The surface layer is made of epoxy resin or a soluble polymer; the intermediate layer and the bottom layer include epoxy resin or a soluble polymer, aerogel powder, silver powder, iodine powder, a dispersant, a defoaming agent, and a curing agent. The epoxy resin or soluble polymer is used as a base material, and aerogel powder, silver powder, iodine powder or a combination of the three is used as a thermal insulation and antibacterial aggregate. The required dispersant, defoaming agent or curing agent is selected to prepare the required antibacterial and thermal insulation coating. The multi-layer antibacterial and thermal insulation coating is prepared by roller coating or the antibacterial and thermal insulation patch and antibacterial and thermal insulation board are prepared by extrusion (injection, pressing, and molding are also possible); the present invention is specifically described by taking the preparation process of the multi-layer antibacterial and thermal insulation coating as an example, but is not limited to the multi-layer antibacterial and thermal insulation coating, and should also be extended to antibacterial and thermal insulation patches and antibacterial and thermal insulation boards.

[0031] The mass fractions of the aerogel monomers are 6%, 10%, 16% and 18% respectively, and the mass fractions of the copper powders are 10%, 15% and 30% respectively. Figure 3-Figure 5 As shown in FIG, when aerogel powder with a filling amount of 18% and silver powder with a thickness of 1mm and epoxy resin with a thickness of 1mm are used as a binder, an antibacterial and heat-insulating effect is achieved.

[0032] like Figure 1 As shown, the preparation method of the antibacterial thermal insulation coating based on aerogel powder includes the following steps:

[0033] Step 1: Add epoxy resin, solvent and additives into a dispersion tank and stir at high speed for 15 minutes; the solvent is selected as diluent X-9; the additive is selected as a wetting dispersant or a defoaming agent; the defoaming agent is selected as XQ-ADD 251.

[0034] Step 2: Add functional filler, stir evenly, and disperse at high speed for 15 minutes; the functional filler is aerogel powder, copper powder or bentonite; the copper powder is 300-500 mesh; the wetting dispersant is BYK-188 type wetting dispersant;

[0035] Step 3: Place the dispersed material into a sand mill and grind it to a fineness of less than 5 μm;

[0036] Step 4: Transfer the ground material into a paint mixing kettle, add additives and stir at medium speed for 5-10 minutes until it is uniform;

[0037] Step 5: Adjust the viscosity of the evenly stirred material. After the adjustment is completed, the required coating is obtained. After the finished product is tested for qualified performance, it is filtered and packaged.

[0038] In summary, multi-layer antibacterial thermal insulation materials are composed of single-layer structures with different parameters stacked together. A single-layer antibacterial thermal insulation structure was prepared by hot rolling, dipping, film manufacturing and roller coating, and then a multi-layer antibacterial thermal insulation material was prepared by combining the single-layer structures. This material has great potential in the field of medical devices. In the design of multi-layer antibacterial thermal insulation materials, the principles of gradient insulation and substrate antibacterial are often adopted to increase the antibacterial properties of the material. The antibacterial ability of the material is generally achieved by changing the silver powder concentration or changing the type of material. Multi-layer antibacterial thermal insulation materials achieve matching of different working conditions through multi-layer design to improve the antibacterial thermal insulation ability, and improve the antibacterial thermal insulation performance by optimizing the thickness and shielding parameters of each layer.

[0039] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. Antimicrobial and thermal insulation coating based on aerogel powder, characterized by: It includes a surface layer, an intermediate layer and a bottom layer, wherein the surface layer is made of epoxy resin or soluble polymer; The middle layer and the bottom layer include epoxy resin or soluble polymer, aerogel powder, silver powder, iodine powder, dispersant, defoaming agent, and curing agent. The epoxy resin or soluble polymer is used as the base material, silver powder, iodine powder or a combination of the two is used as the antibacterial powder, and aerogel powder is used as the thermal insulation powder. The required dispersant, defoaming agent or curing agent is selected to prepare the required antibacterial thermal insulation coating, and a multi-layer antibacterial thermal insulation coating is produced by roller coating.

2. A method for preparing an antibacterial and thermal insulation coating based on aerogel powder, characterized in that: The following steps are included: Step 1: Add epoxy resin, solvent and additives into a dispersion tank and stir at high speed for 15 minutes; Step 2: Add the functional filler and stir evenly, and disperse at high speed for 15 minutes; Step 3: Place the dispersed material into a sand mill and grind it to a fineness of less than 5 μm; Step 4: Transfer the ground material into a paint mixing kettle, add additives and stir at medium speed for 5-10 minutes until it is uniform; Step 5: Adjust the viscosity of the evenly stirred material. After the adjustment is completed, the required coating is obtained. After the finished product is tested for qualified performance, it is filtered and packaged.

3. The method for preparing an antibacterial and thermal insulation coating based on aerogel powder according to claim 2, characterized in that: The solvent selected was diluent X-9.

4. The method for preparing an antibacterial and thermal insulation coating based on aerogel powder according to claim 2, characterized in that: The functional filler is selected from aerogel powder, silver powder, iodine powder or bentonite.

5. The method for preparing an antibacterial and thermal insulation coating based on aerogel powder according to claim 2, characterized in that: The silver powder is selected from 300-500 meshes.

6. The method for preparing an antibacterial and thermal insulation coating based on aerogel powder according to claim 2, characterized in that: The auxiliary agent is a wetting and dispersing agent or a defoaming agent.

7. The method for preparing an antibacterial and thermal insulation coating based on aerogel powder according to claim 4, characterized in that: The wetting and dispersing agent is BYK-188 type wetting and dispersing agent.

8. The method for preparing a conductive thermal insulation coating based on aerogel powder according to claim 4, characterized in that: The defoaming agent is XQ-ADD 249.

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