Highly durable super-hydrophilic coating

A super-hydrophilic and durable technology, used in coatings, alkali metal silicate coatings, etc., can solve the problems of inability to use for a long time, difficult to achieve complete hydrolysis, and reduce the adhesion of materials, so as to improve the bonding of materials. force effect

Active Publication Date: 2019-03-01
江苏先进无机材料研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult for silicate materials to be completely hydrolyzed during the hydrolysis process. Generally, there will be monomers of R-O-Si, which reduces the bonding force of the material and the adhesion to the substrate, and cannot be used for a long time under normal temperature or high temperature and high humidity conditions.

Method used

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Examples

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preparation example Construction

[0032] Preparation of alcohol-based superhydrophilic silicone coatings. Preparation of silica sol. Silicic acid esters are added to a solvent (for example, an alcohol solvent), and after being uniformly stirred, an acidic catalyst and deionized water are added dropwise thereto, and stirred for 3 to 5 hours to obtain a silica sol. The mass concentration of the silica sol formed by the acid-catalyzed hydrolysis of the silicate can be 1-20%. The mass ratio of the alcohol solvent, silicate, acidic catalyst, and deionized water may be (60-98):(1-20):(0-2):(1-20). The alcohol solvent may be one or more of methanol, ethanol, isopropanol and isobutanol. The acid catalyst can be one or more of formic acid, acetic acid, hydrochloric acid, nitric acid, sulfuric acid and phosphoric acid. The silicate can be one or more than ethyl orthosilicate, methyl orthosilicate and the like. The silica nanoparticles are uniformly dispersed in a solvent (for example, an alcohol solvent, etc.), and ...

Embodiment 1

[0039] A high-durability super-hydrophilic coating: the method of the present invention uses a sol-gel process to prepare a super-hydrophilic film by scraping. Clean the surface of ordinary glass with alcohol and use it as the coating substrate. Use orthoethyl silicate (TEOS) as the silicon source, HCl as the catalyst, and ethanol as the solvent, configure a silica sol with a concentration of about 4%, and mix it with an ethanol dispersion of silicon oxide with a concentration of 4%, according to a mass ratio of 1: 1 Mix evenly to obtain the underlying alcoholic super-hydrophilic silicone coating; prepare 4% sodium water glass as the top coat. Use the scraper coating method to evenly coat the bottom super-hydrophilic silicone coating on the cleaned glass surface. After curing for 30 minutes at 20°C, apply the prepared surface water glass coating on the surface with the scraper coating method. Curing for 30min. figure 1 The wettability of alcoholic superhydrophilic coatings a...

Embodiment 2

[0044] A high-durability super-hydrophilic coating: the method of the present invention uses a sol-gel process to prepare a super-hydrophilic film by scraping. Clean the surface of ordinary glass with alcohol and use it as the coating substrate. Use orthoethyl silicate (TEOS) as the silicon source, HCl as the catalyst, and ethanol as the solvent, configure a silica sol with a concentration of about 4%, and mix it with an ethanol dispersion of silicon oxide with a concentration of 2%, according to a mass ratio of 1: 1 Mix evenly to obtain the underlying alcoholic super-hydrophilic silicone coating; prepare sodium water glass with a concentration of 20% as the top coat. Use the scraper coating method to evenly coat the bottom super-hydrophilic silicone coating on the cleaned glass surface. After curing for 30 minutes at 20°C, apply the prepared surface water glass coating on the surface with the scraper coating method. Curing for 30min. In the high-durability super-hydrophilic...

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Abstract

Theinvention relates to a highly durable super-hydrophilic coating, comprising a base material, a surface layer and a bottom layer between the base material and the surface layer, wherein the bottom layer is an alcoholic super-hydrophilic silicone coating, and the surface layer is an inorganic water glass layer. The highly durable super-hydrophilic coating can greatly enhance the material bindingforce while retaining the super-hydrophilic surface, and can be used for a long time at normal temperature or high temperature and high humidity.

Description

technical field [0001] The invention relates to a high-durability super-hydrophilic coating, which can be used in technical fields such as anti-fog and heat dissipation. Background technique [0002] Surface wettability is an important characteristic of solid surfaces. When the contact angle between water and the substrate is less than 5 degrees, it is defined as a super-hydrophilic surface, and water can form a uniform water film on the super-hydrophilic surface. In daily life, when there is a temperature difference or high humidity during the rainy season and winter, a layer of fog is easily formed on the surface of transparent substrates such as vehicle glass, rearview mirrors, eyeglass lenses, and building glass, which refracts and diffuses light. Reflection not only greatly reduces the transparency, but also may affect the operation and operator safety; when the air conditioner or radiator with heat exchanger is running, condensed water usually adheres to the radiator ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D1/02
CPCC09D1/00C09D1/02
Inventor 李荣金平实
Owner 江苏先进无机材料研究院
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