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Preparation method of highly transparent wear-resistant superhydrophobic composite coating

A composite coating, super-hydrophobic technology, applied in coatings, epoxy resin coatings, etc., can solve the problems of cumbersome operation, low application value, not enough environmental protection, etc., and achieve the effect of simple preparation method and wide applicability

Active Publication Date: 2017-08-08
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the prepared superhydrophobic coatings often have two problems-poor transparency and abrasion resistance, which are powerful obstacles to the practical application of superhydrophobic coatings.
[0003] Patent document CN106398334A discloses a polyurethane / polyurethane-silicon dioxide / silicon dioxide functional gradient composite structure wear-resistant transparent super-hydrophobic coating, although the coating prepared by this method has both transparency and wear resistance, but the method operates It is cumbersome, and acetone is used as the solvent for the preparation of the super-hydrophobic layer solution, which is toxic and not environmentally friendly. The prepared coating also requires heat treatment at 100-200°C, which requires high temperature, which is not conducive to actual production and application.
Patent document CN106398334A discloses a preparation method of a wear-resistant superhydrophobic coating. The method is to coat a layer of primer on the substrate first, and then roughen it after the primer is cured, and finally coat the superhydrophobic coating on the substrate. Coatings, although this method improves the wear resistance of the coating, the preparation of the primer is cumbersome, and the final coating is not transparent, so the application value is small

Method used

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  • Preparation method of highly transparent wear-resistant superhydrophobic composite coating
  • Preparation method of highly transparent wear-resistant superhydrophobic composite coating
  • Preparation method of highly transparent wear-resistant superhydrophobic composite coating

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) Mix 0.835g epoxy resin E51, 0.084g ethylene glycol diglycidyl ether, and 0.418g curing agent T31 evenly, stir for 15 minutes, then dip a certain amount with a blade and apply it on the glass substrate, and dry it at room temperature After 1 hour, the glue started to solidify.

[0027] (2) Mix 12.4mL tetraethyl orthosilicate and 97.2mL absolute ethanol, reflux and stir at 60°C for 10min, then add dropwise a mixture of 7.8mL ammonia water and 1mL deionized water, and continue stirring for 2 hours. Keep stirring under reflux at 60°C, add 5.5mL methyltriethoxysilane dropwise, continue stirring for 1 hour, age for 1 day, and then put it in an oven at 60°C for 2 days to volatilize the solvent to obtain a modified surface hydrophobicity. Sexual nano-silica powder.

[0028] (3) Put 0.65g of silica powder in 50mL of absolute ethanol, reflux and stir at 60°C for 1 hour, and then ultrasonically disperse at room temperature for 1 hour to obtain a superhydrophobic silica disper...

Embodiment 2

[0032] (1) Mix 0.628g epoxy resin E51 with 0.094g n-butyl glycidyl ether, then add 0.314g curing agent T31 and mix well, stir for 15 minutes, then dip a certain amount with a blade and apply it on the glass substrate, room temperature After drying for 1 hour, the glue starts to solidify.

[0033] (2) Mix 37.2mL tetraethyl orthosilicate and 291.6mL absolute ethanol, reflux and stir at 60°C for 10min, then add dropwise a mixture of 23.37mL ammonia water and 3mL deionized water, and continue stirring for 2 hours. Keep stirring under reflux at 60°C, add 16.6mL methyltriethoxysilane dropwise, continue stirring for 1 hour, age for 1 day, and then put it in an oven at 60°C for 2 days to volatilize the solvent to obtain a modified surface hydrophobicity. Sexual nano-silica powder.

[0034] (3) Put 1.3g of silica powder in 100mL of absolute ethanol, reflux and stir at 60°C for 1 hour, and then ultrasonically disperse at room temperature for 1 hour to obtain a superhydrophobic silica d...

Embodiment 3

[0038] (1) Mix 1.674g epoxy resin E51 with 0.251g n-butyl glycidyl ether, then mix with 0.837g curing agent T31 evenly, stir for 15 minutes, then dip a certain amount with a blade and apply it on the glass substrate, at room temperature After drying for 1 hour, the glue starts to solidify.

[0039] (2) Mix 24.8mL tetraethyl orthosilicate and 194.4mL absolute ethanol, reflux and stir at 60°C for 10 minutes, then add dropwise a mixture of 15.6mL ammonia water and 2mL deionized water, and continue stirring for 1 hour after dropping. Keep stirring under reflux at 60°C, add 16.6 mL of methyltriethoxysilane dropwise, and continue stirring for 1 hour to obtain a modified silica sol.

[0040] (3) Aging the modified silica sol obtained in step (2) for 1 day, and then drying it in an oven at 60°C to obtain a superhydrophobic silica aerogel.

[0041] (4) Put 0.975g of silica airgel in 75mL of absolute ethanol, reflux and stir at 60°C for 1 hour, and then ultrasonically disperse at room ...

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Abstract

The invention belongs to the technical field of superhydrophobic materials, and particularly relates to a preparation method of a highly transparent wear-resistant superhydrophobic composite coating. Surface-modified nano-silica powder prepared by a sol-gel method is dispersed in anhydrous ethanol to obtain a superhydrophobic coating solution. The surface of a substrate of stone, metal, glass and the like is coated with reactive-diluent-modified E-51 epoxy resin glue, standing is carried out for 1 to 2 hours at room temperature, the superhydrophobic coating solution is used for brushing to obtain the highly transparent wear-resistant superhydrophobic coating. The contact angle between the coating and water is 165 to 175 DEG, a rolling angle is 2 to 5 DEG, the light transmittance of coating glass in the 500 to 650nm is greater than 84%, and at pressure intensity of 2500 Pa, the contact angle between the coating and water is greater than 90 DEG after the coating is rubbed with 320-mesh sandpaper along a line. The preparation method of the coating is simple, environmentally friendly and low in cost, is suitable for the surface of glass, stone, ceramics, wood, metal and the like, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of superhydrophobic materials, and in particular relates to a preparation method of a highly transparent wear-resistant superhydrophobic composite coating. Background technique [0002] "Superhydrophobic" refers to the wettability of the solid surface when the contact angle of water droplets on the solid surface is greater than 150°. The inspiration for superhydrophobicity comes from lotus leaves in nature. In recent years, the preparation of bionic superhydrophobic coatings has been widely accepted. Attention, the preparation technology is becoming more and more diverse and more mature. However, the prepared superhydrophobic coatings often have two problems-poor transparency and abrasion resistance, which are powerful obstacles to the practical application of superhydrophobic coatings. [0003] Patent document CN106398334A discloses a polyurethane / polyurethane-silicon dioxide / silicon dioxide functional gra...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D7/12
CPCC08K3/36C08K9/06C08K2201/011C09D163/00
Inventor 李湘祁钟敏珍
Owner FUZHOU UNIV
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