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High wearing resistance normal-temperature cured bottom surface syncretic super-hydrophobic coating and preparation method thereof

A super-hydrophobic coating, room temperature curing technology, applied in coatings and other directions, can solve the problems of complex preparation process of super-hydrophobic coating, low wear resistance of super-hydrophobic coating, etc., to achieve the feasibility of expanding application and good super-hydrophobicity , to avoid the effect of the mixing process

Inactive Publication Date: 2019-07-12
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved: Aiming at the problems of complex preparation process of superhydrophobic coating and low wear resistance of superhydrophobic coating in the prior art, the present invention provides a super

Method used

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  • High wearing resistance normal-temperature cured bottom surface syncretic super-hydrophobic coating and preparation method thereof
  • High wearing resistance normal-temperature cured bottom surface syncretic super-hydrophobic coating and preparation method thereof
  • High wearing resistance normal-temperature cured bottom surface syncretic super-hydrophobic coating and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0029] Example 1

[0030] (1) Preparation of superhydrophobic silica particles:

[0031] Under the condition of heating in a water bath at 50°C, 12 g of nano-aqueous silica sol was added dropwise to 100 g of absolute ethanol. The nano-particles in the nano-aqueous silica sol were silica particles with a diameter of less than 100 nm, and the shape was spherical. Add 4g of 25vt.% ammonia water after 30 minutes, mechanically stir for 30 minutes, add 1 g of dodecyltriethoxysilane dropwise, continue stirring for 2 hours and then stand for 24 hours; the above solution is 60℃, 55 r / min rotation speed conditions Rotary steaming for 3 h to obtain a 10-fold concentrated gel-like concentrate, and then freeze-dry the concentrated gel in a freeze dryer at -85°C for 48 h to remove the solvent to obtain superhydrophobic silica powder.

[0032] (2) Preparation of super-hydrophobic coating on the bottom surface:

[0033] Add 4 g of superhydrophobic silica particles to 20 g of acetone solution, add 0....

Example Embodiment

[0035] Example 2

[0036] (1) Preparation of superhydrophobic graded particles:

[0037] Under the condition of heating in a water bath at 55°C, 20 g of nano-aqueous silica sol was added dropwise to 100 g of absolute ethanol. The nano-particles in the nano-aqueous silica sol are silica particles with a diameter of less than 100 nm, and the shape is chain-like, mechanically stirred Add 4.5 g of 28vt.% ammonia water after 20 minutes, stir for 10 minutes and add 20 g of micron-sized diatomaceous earth particles, see figure 1 The surface of the micron-scale diatomaceous earth particles has a nano-scale pore structure with a diameter of 20-30 μm, and the shape is sheet, column, and disc. After 30 minutes of mechanical stirring, 1.5 g of dodecyltriethoxysilane was added dropwise, stirring continued for 2 hours, and then standing for 24 hours; the above solution was rotary evaporated for 3 hours under the conditions of 60℃ and 60 r / min to obtain the concentration 10 times the gel-like co...

Example Embodiment

[0041] Example 3

[0042] (1) Preparation of superhydrophobic graded particles:

[0043] Under the condition of heating in a water bath at 50°C, 12 g of nano-aqueous silica sol is added dropwise to 100 g of absolute ethanol. The nano-particles in the nano-aqueous silica sol are silica particles with a diameter of less than 100 nm, and the shape is beaded. Add 4 g of 25 vt.% ammonia water after 10 minutes, add 20 g of micron-sized diatomaceous earth particles after stirring for 20 minutes, the surface of the micron-sized diatomaceous earth particles has a nanometer-scale pore structure, and the shape is columnar. After mechanical stirring for 20 minutes Add 1 g of dodecyltriethoxysilane dropwise, continue to stir for 2 hours and then stand for 20 hours to obtain a superhydrophobic gradation solution of nano-silica and micro-diatomite composite; the above solution is 30 ℃, 80 r Rotary steaming for 5 h at a rotation speed of / min to obtain a 9-fold concentrated gel-like concentrate, ...

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Abstract

The invention discloses a high wearing resistance normal-temperature cured bottom surface syncretic super-hydrophobic coating and a preparation method thereof and belongs to the field of coating preparation. The coating comprises the following components: a fluorocarbon resin, a fluorocarbon resin curing agent, super-hydrophobic graded granules, propylene glycol methyl ether acetate, dibutyltin dilaurate, chloridization modified polypropylene, hydrogenated castor oil, an acrylate copolymer and a diluent. The preparation method comprises the following steps: firstly, preparing a super-hydrophobic graded solution, further preparing the super-hydrophobic graded granules, and finally preparing the bottom surface syncretic super-hydrophobic coating. The prepared coating not only has excellent super-hydrophobic properties, but also has good wearing resistance, and can be widely applied to various base material surfaces. In addition, the coating is simple in preparation process, low in equipment requirement, easy to operate and applicable to large-scale preparation production, and problems that a conventional super-hydrophobic coating is complex in preparation process, hard to use, and the like, can be effectively solved.

Description

technical field [0001] The invention belongs to the field of coating preparation, and in particular relates to a super-hydrophobic coating with high wear resistance and room temperature curing and bottom-surface integration and a preparation method thereof. Background technique [0002] The superhydrophobic surface is inspired by the "lotus leaf effect". Under the joint action of the surface micro-nano composite structure and low surface energy organic matter, the static contact angle of liquid water droplets on the coating surface is greater than 150°, and the rolling angle is less than 10°. . At present, one of the important methods to obtain superhydrophobic surface is by changing the physical and chemical properties of the substrate itself, that is, constructing a rough structure on the surface of the substrate and performing low surface energy modification or constructing a rough structure on the surface of the low surface energy substrate, but due to its The process...

Claims

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Application Information

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IPC IPC(8): C09D127/12C09D7/62C09D7/65
CPCC08K2201/011C09D7/62C09D7/65C09D127/12C08L23/28C08K9/06C08K3/36C08K7/26
Inventor 张友法王巧玲张丽清顾万诚余新泉吴立新
Owner SOUTHEAST UNIV
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