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Wear-resistant super-hydrophobic coating compound

A technology of super-hydrophobic coatings and compositions, applied in the direction of coatings, etc., can solve the problems of no literature reports, super-hydrophobic inconvenience, etc., and achieve the effects of mild conditions, convenient construction, and cost reduction

Active Publication Date: 2017-05-10
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the superhydrophobicity of this two-layer system will cause inconvenience in practical construction applications.
[0005] Therefore, it is of great significance to prepare simple single-layer superhydrophobic coatings with excellent mechanical properties, but so far there have been no reports in the literature

Method used

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  • Wear-resistant super-hydrophobic coating compound
  • Wear-resistant super-hydrophobic coating compound
  • Wear-resistant super-hydrophobic coating compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] First, prepare a three-component coating composition with the following formula: (i) 50 g of superhydrophobic nanosol with amino groups, the specific preparation method is as follows: 10 g of tetraethoxysilane is dissolved in 120 ml of isopropanol alcohol , add 10 g of water and 3 g of ammonia water, heat the reaction at 55 ° C for 4 hours to obtain a monodisperse silica solution; adjust the pH to 3.5, and then add 2.5 g of NH 2 (CH 2) 2 NH(CH 2 ) 3 Si(OCH 2 CH 3 ) 3 , after stirring for 4 hours at 50 ℃, add 5 g of tridecafluorooctyltriethoxysilane, and continue stirring for 5 hours to obtain a superhydrophobic sol, (ii) 10 g of wear-resistant silicone resin, (iii) 0.4 g of curing agentγ - Aminopropyltriethoxysilane. Then, 10 g of wear-resistant silicone resin was added to 50 g of superhydrophobic nano-sol with amino groups, stirred for 30 minutes, and then 0.4 g of curing agent γ-aminopropyltriethoxysilane was added, and stirred for 10 minutes. Finally, spread ...

Embodiment 2

[0049] First, prepare a coating composition with the following formula: (i) Take 50 g of superhydrophobic nano-sol with amino groups, the specific preparation method is: dissolve 10 g of tetraethoxysilane in 100 ml of ethanol, add 10 g Water and 2 g ammonia water were reacted by heating at 60°C for 4 hours to obtain a monodisperse silica solution; adjust the pH to 3.5, and then add 3 g NH 2 (CH 2 ) 3 Si(OCH 2 CH 3 ) 3 , Stir at 50 ℃ for 4 hours, add 6 g of n-octadecyltriethoxysilane, and continue stirring for 5 hours to obtain a superhydrophobic sol, (ii) 10 g of silicone-modified silicone resin (solid content 20%). Then, 10 g of silicone-modified silicone resin was added to 70 g of superhydrophobic nano-sols with amino groups, and stirred for 30 minutes. Finally, apply it on a 7 cm*2.5 cm glass slide and cure at 80 ℃ for 0.5 hours.

[0050] After curing, the superhydrophobic coating has good transparency, abrasion resistance and hydrophobicity. Adopt ultraviolet spectr...

Embodiment 3

[0052] First, prepare a coating composition with the following formula: (i) 150 g of superhydrophobic nano-sol with amino group, the specific preparation method is as follows: dissolve 10 g of tetraethoxysilane in 120 ml of isopropanol alcohol, add 10 g water and 3 g ammonia water were heated and reacted at 55°C for 4 hours to obtain a monodisperse silica solution; adjust the pH to 3.5, and then add 2.5 g NH 2 (CH 2 ) 3 Si(OCH 3 ) 3 , Stir at 50 ℃ for 4 hours, add 5 g n-octyltrimethoxysilane, and continue stirring for 5 hours to obtain a superhydrophobic sol, (ii) 10 g fluororesin (solid content 50%). Then, 10 g of fluororesin was added to 70 g of superhydrophobic nano-sols with amino groups, and stirred for 30 minutes. Finally, spread on a 7 cm*2.5 cm glass slide and cure at 120 °C for 2 hours.

[0053] The cured superhydrophobic coating has good wear resistance. The contact angle of the superhydrophobic coating of this example measured by a contact angle measuring inst...

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Abstract

The invention relates to a wear-resistant super-hydrophobic coating compound. The compound at least comprises the following components: i) super-hydrophobic sol having amino group, and ii) resin capable of reacting with super-hydrophobic sol or combining with super-hydrophobic sol thorough a hydrogen bond and intermolecular force. The coating compound can be used for coating on the surface of a matrix such as glass, metal, ceramic, paper and cloth by a coating, spin coating, spraying or spray coating method, and a super-hydrophobic layer is formed. The coating formed on the hard base materials such as glass and metal has excellent hydrophobicity and wear resistance; a contact angle is greater than 160 DEG, a roll angle is 1 DEG; under pressure of 100g counterweight, 240-mesh sand paper is used for grinding, grinding thickness for each time is 10 cm, the contact angle after 40 times of grinding is still greater than 157 DEG C; THE pencil hardness is 7-9 H, and the adhesive force is between grade 0 and 1.

Description

technical field [0001] The invention relates to a wear-resistant superhydrophobic coating composition. More specifically, it relates to a coating composition capable of forming a superhydrophobic coating having excellent superhydrophobic properties and good mechanical properties. Background technique [0002] In recent years, the properties of superhydrophobic interfaces in nature have attracted extensive attention. A superhydrophobic surface refers to a water contact angle of greater than 150° and a rolling angle of less than 5°. This surface has many unique properties (such as self-cleaning, anti-corrosion, anti-fouling, anti-ice, drag reduction, etc.), and has extremely broad application prospects in national defense construction, industrial and agricultural production, and daily life. [0003] At present, there are many reports on superhydrophobic coatings, but the practical application of superhydrophobic surfaces has not yet been popularized, and many problems need t...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/12
Inventor 孙小英施利毅陈亮杭建忠金鹿江
Owner SHANGHAI UNIV
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