Super-hydrophobic and oleophobic composite coating and preparation method thereof

A super-hydrophobic and oleophobic composite coating technology, which is applied in coatings, epoxy resin coatings, and devices for coating liquids on the surface, can solve problems such as oil resistance, wear resistance, and poor stability, and reduce Effect of surface energy, improved hydrophobicity and oleophobicity, good wear resistance and stability

Inactive Publication Date: 2015-07-01
GUANGZHOU SYSMYK NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the defects of poor stability, wear resistance and oil resistance of the existing superhydrophobic materials, the present invention provides a superhydrophobic and oleophobic composite coating with good stability, oil resistance and good wear resistance and its preparation method

Method used

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  • Super-hydrophobic and oleophobic composite coating and preparation method thereof
  • Super-hydrophobic and oleophobic composite coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step (1) Preparation of superhydrophobic and oleophobic primer: at room temperature, 10g epoxy resin, 1g 3-glycidyl etheroxypropyl trimethoxysilane and 2g particle diameter are 3 μm matting powder added to 100g butanone In the process, use 1500r / min to stir for 30min on a high-speed mixer, and after mixing evenly, a superhydrophobic and oleophobic primer is obtained;

[0033] Step (2) Preparation of superhydrophobic and oleophobic topcoat: After mixing 90g of ethanol and 10g of water evenly, add 1g of fumed silica with a particle size of 16nm, 1g of heptadecafluorodecyltrimethoxysilane, 1g of γ-aminopropyl Triethoxysilane, stirred on a high-speed mixer at 1500r / min for 30min, added dropwise 2g of 10wt% acetic acid aqueous solution, mixed evenly, moved to a 500ml four-necked flask, and placed in a water bath at 65°C for 8 hours of heating. , to obtain a superhydrophobic and oleophobic topcoat;

[0034] Step (3) Use spraying process, spray superhydrophobic and oleophobic...

Embodiment 2

[0037] Step (1) Preparation of superhydrophobic and oleophobic primer: at room temperature, 10g epoxy resin, 1g 3-glycidyloxypropyltrimethoxysilane and 4g particle diameter are 3 μm matting powder added to 100g butanone In the process, use 1500r / min to stir for 30min on a high-speed mixer, and after mixing evenly, a superhydrophobic and oleophobic primer is obtained;

[0038] Step (2) Preparation of superhydrophobic and oleophobic topcoat: After mixing 90g of ethanol and 10g of water evenly, add 2g of fumed silica with a particle size of 16nm, 2g of heptadecafluorodecyltrimethoxysilane, 1g of γ-aminopropyl Triethoxysilane, stirred on a high-speed mixer at 1500r / min for 30min, added dropwise 2g of 10wt% acetic acid aqueous solution, mixed evenly, moved to a 500ml four-necked flask, and placed in a water bath at 65°C for 8 hours of heating. , to obtain a superhydrophobic and oleophobic topcoat;

[0039] Step (3) is the same as in Example 1.

[0040] The superhydrophobic and ol...

Embodiment 3

[0042]Step (1) Preparation of superhydrophobic and oleophobic primer: at room temperature, 10g epoxy resin, 1g2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane and 2g particle size are 6 μm Add the powder into 100g methyl ethyl ketone, stir on a high-speed mixer at 1500r / min for 30min, and mix evenly to obtain a superhydrophobic and oleophobic primer;

[0043] Step (2) Preparation of superhydrophobic and oleophobic topcoat: After mixing 90g of ethanol with 10g of water, add 1g of fumed silica with a particle size of 20nm, 1g of tridecafluorooctyltriethoxysilane, 1g of diethylene Triaminopropyltrimethoxysilane, stirred on a high-speed mixer at 1500r / min for 30min, added dropwise 2g of 10wt% acetic acid aqueous solution, mixed evenly, moved to a 500ml four-necked flask, and placed in a water bath at a temperature of 65°C Heating and reacting for 8 hours to obtain a superhydrophobic and oleophobic topcoat;

[0044] Step (3) is the same as in Example 1.

[0045] The contact angle of ...

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Abstract

The invention discloses a super-hydrophobic and oleophobic composite coating which comprises a super-hydrophobic and oleophobic primer coat layer and a super-hydrophobic and oleophobic finishing coat layer. The coating is characterized in that the super-hydrophobic and oleophobic finishing coat layer is located on the super-hydrophobic and oleophobic primer coat layer; the super-hydrophobic and oleophobic primer coat layer is coated by a super-hydrophobic and oleophobic primer coat which is a composition containing epoxy resin, an auxiliary A, extinction powder and a solvent; the super-hydrophobic and oleophobic finishing coat layer is coated by a super-hydrophobic and oleophobic finishing coat which is a composition containing fumed silica, an auxiliary B, an auxiliary C, a mixed solution A and a mixed solution B. Compared with the prior art, the super-hydrophobic and oleophobic composite coating disclosed by the invention not only has a super-hydrophobic performance, but also can resist greasy dirt and has a super-oleophobic performance as well as good wear resistance and stability; the preparation process is simple, and realization of industrialized production is facilitated.

Description

technical field [0001] The invention relates to the field of hydrophobic materials, in particular to a superhydrophobic and oleophobic composite coating and a preparation method thereof. Background technique [0002] The superhydrophobic phenomenon originates from human beings' understanding of the lotus leaf effect in nature. A superhydrophobic surface refers to a surface with a water contact angle of greater than 150° and a rolling angle of less than 10°. Since water droplets remain spherical on the surface and can roll and slide freely when tilted at a small angle, taking away hydrophilic substances such as dust and soil on the surface, the superhydrophobic surface has excellent self-cleaning function. [0003] The special surface wettability of superhydrophobic surface makes it have a wide range of application prospects in the fields of self-cleaning, waterproof, anti-icing, anti-corrosion, and fluid transportation. Studies have shown that the formation of superhydroph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D1/00C09D7/12B05D1/38B05D3/02
Inventor 蒋卫中徐向东李坤泉王江兵
Owner GUANGZHOU SYSMYK NEW MATERIAL TECH CO LTD
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