Super-hydrophobic nanocomposite coating with excellent mechanical stability and preparation method thereof

A nano-composite material and technology for stabilizing performance, applied in coatings, epoxy resin coatings, devices for coating liquids on surfaces, etc. It is not obvious and other problems, and achieves the effects of excellent mechanical toughening and interfacial hydrophobicity, excellent hydrophobicity and lubricating properties, high temperature resistance and low density.

Active Publication Date: 2022-07-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the superhydrophobic materials or superhydrophobic coatings prepared by the above patents generally have low mechanical strength, poor mechanical stability, and usually low bonding strength with the surface of the substrate And other shortcomings, which make the super-hydrophobic performance of the material unstable, and at the same time lack of micro-controllability and systemicity, and different shortcomings such as complicated operation, unobvious long-term super-hydrophobic performance, high cost, frequent accidents during use, etc., seriously affect its application

Method used

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  • Super-hydrophobic nanocomposite coating with excellent mechanical stability and preparation method thereof
  • Super-hydrophobic nanocomposite coating with excellent mechanical stability and preparation method thereof
  • Super-hydrophobic nanocomposite coating with excellent mechanical stability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In this example, the influence of different concentrations of polymethylsilsesquioxane on the hydrophobic properties of the coating was discussed. The specific operation process is as follows:

[0055] Weigh 5 parts of 500mg epoxy resin, 172mg epoxy curing agent and 100g absolute ethanol into 5 beakers, then add 100mg, 200mg, 300mg, 400mg and 500mg of polymethylsilsesquioxane respectively. , respectively, ultrasonically stirred to obtain coating glue solutions with different concentrations of polymethylsilsesquioxane, and the sample names were marked according to the amount of polymethylsilsesquioxane added relative to the mass concentration of ethanol solvent, which were 1 mg / g, 2 mg / g, 3 mg / g, 4 mg / g and 5 mg / g.

[0056] Then use a 0.2mm spray diameter to spray the coating solution of different polymethylsilsesquioxane concentrations on the substrate evenly, the distance between the nozzle and the substrate is 200mm, the amount of each spraying solution is controlled ...

Embodiment 2

[0060] This example discusses the influence of different silica concentrations on the hydrophobic properties of the coating, and the specific operation process is as follows:

[0061] Weigh 5 parts of 500mg epoxy resin, 172mg epoxy curing agent and 100g absolute ethanol and place them in 5 beakers respectively, then add 200mg, 400mg, 600mg, 800mg and 1000mg of silicon dioxide respectively, and stir ultrasonically evenly. Coating glue solutions with different silica concentrations were obtained, and the sample names were marked according to the amount of silica added relative to the mass concentration of the ethanol solvent, which were 2mg / g, 4mg / g, 6mg / g, 8mg / g and 10mg / g respectively. .

[0062] Then use a 0.2mm spray diameter to spray the coating solution of different silica concentrations on the substrate evenly. The distance between the nozzle and the substrate is 200mm. The amount of the spray solution is controlled at 1mL each time. Dry in an oven at 60°C for 3 hours, r...

Embodiment 3

[0065] This example discusses the influence of different spraying times on the hydrophobic properties of the coating, and the specific operation process is as follows:

[0066] Add 600 mg of silicon dioxide to 100 g of absolute ethanol, add 300 mg of polymethylsilsesquioxane and stir evenly, then add 500 mg of epoxy resin and 172 mg of epoxy curing agent, and ultrasonically stir to obtain a coating glue solution.

[0067] Then use a 0.2mm spray diameter spray pen to spray the coating glue solution on the substrate evenly. The spraying times for different substrates are 1 layer, 2 layers, 3 layers..., 10 layers. The distance between each spray nozzle and the substrate is 200mm, and the amount of each spraying solution is controlled at 1mL. In multi-layer spraying, each layer is uniformly sprayed and then moved to a 60°C oven for 3 hours. Finally, the coatings with different spraying times are moved to a 100°C oven for 6 hours to dry to obtain different sprays. number of coats. ...

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Abstract

The invention discloses a super-hydrophobic nano composite material coating with excellent mechanical stability and a preparation method of the super-hydrophobic nano composite material coating, and belongs to the technical field of preparation of super-hydrophobic composite coating materials. The super-hydrophobic nano composite material coating comprises a bottom film and a top film, the bottom film is an epoxy resin film layer doped with titanium dioxide and attached to the surface of a substrate, and the top film is an epoxy resin film layer doped with modified silicon dioxide and polymethylsilsesquioxane and located on the bottom film. The epoxy resin in the top film of the composite coating not only can coat micro / nano particles to prevent the micro / nano particles from falling off during long-term realization of a super-hydrophobic function, but also can form three-dimensional spatial crosslinking with the epoxy resin in the bottom coating, so that interface debonding of the upper coating and the lower coating is prevented, super-stable'welding 'of an interface is enhanced, and the service life of a super-hydrophobic coating system is prolonged.

Description

technical field [0001] The invention relates to a super-hydrophobic nano-composite material coating with excellent mechanical stability and a preparation method thereof, belonging to the technical field of preparation of super-hydrophobic composite coating materials. Background technique [0002] A superhydrophobic surface refers to a material surface with a static contact angle between the surface and water greater than 150° and a dynamic rolling angle less than 10°. In general, the construction of superhydrophobic properties on the surface of materials is mainly achieved by reducing the free energy of the material surface and increasing the roughness of the material surface. There are three types of superhydrophobic models: the Young model shows that when a water droplet is in contact with the surface, the interface is the result of the Gibbs free energy equilibrium of the solid-liquid-gas three-phase system; the Wenzel model believes that water can completely penetrate in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D7/61C09D7/62C09D7/65B05D5/00B05D7/24B05D1/38B05D5/10B05D5/02
CPCC09D163/00C09D7/61C09D7/62C09D7/65C09D7/70B05D5/00B05D7/24B05D1/38B05D7/544B05D5/10B05D5/02C08K2003/2241C08K2201/011B05D2504/00B05D2601/24B05D2601/22B05D2602/00C08K3/22C08L83/04C08K9/06C08K7/26
Inventor 咸贵军田经纬齐肖白艳博
Owner HARBIN INST OF TECH
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