Method for preparing superhydrophobic coating on surface of SiO2 glass

A super-hydrophobic coating and glass surface technology, applied in the coating and other directions, can solve the problems of reduced hydrophobicity, easy wear, poor adhesion, etc., and achieve the effect of short cycle and simple process

Active Publication Date: 2019-11-05
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The sol-gel method has a mild reaction and can be adjusted at room temperature and pressure, so it is widely used. However, the superhydrophobic silica prepared by the sol-gel method has poor adhesion to the glass substrate and poor wear resistance during application. , it is very easy to wear and tear during use, resulting in a decrease in hydrophobicity, so the application of glass super-hydrophobic surfaces has not been industrialized

Method used

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  • Method for preparing superhydrophobic coating on surface of SiO2 glass
  • Method for preparing superhydrophobic coating on surface of SiO2 glass
  • Method for preparing superhydrophobic coating on surface of SiO2 glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In this example, a SiO 2 A method for preparing a superhydrophobic coating on a glass surface, comprising the steps of:

[0045] (1) SiO 2 Glass pretreatment: Soak the glass in a mixed solution of 98% concentrated sulfuric acid and 30% hydrogen peroxide for 4 hours, the volume ratio of 98% concentrated sulfuric acid and 30% hydrogen peroxide is 3:1, use Rinse with deionized water, then soak in the mixed solution of water, hydrogen peroxide and ammonia water, boil the mixed solution for 0.8h, the volume ratio of water, hydrogen peroxide and ammonia water is 4:1:1, and then use deionized water Rinse well, blow dry with nitrogen, then soak in 3-aminopropyltriethoxysilane solution for 22h, 3-aminopropyltriethoxysilane solution refers to 3-aminopropyltriethoxysilane, anhydrous Ethanol, deionized water, and acetic acid are prepared according to the volume ratio of 1:48:1:0.25, cleaned with ethanol, and dried with nitrogen gas for later use;

[0046] (2) Soak the pretreated...

Embodiment 2

[0052] In this example, a SiO 2 A method for preparing a superhydrophobic coating on a glass surface, comprising the steps of:

[0053] (1) SiO 2 Glass pretreatment: Soak the glass in a mixed solution of 98% concentrated sulfuric acid and 30% hydrogen peroxide for 5 hours, the volume ratio of 98% concentrated sulfuric acid and 30% hydrogen peroxide is 7:3, use Rinse with deionized water, then soak in a mixed solution of water, hydrogen peroxide and ammonia water, boil the mixed solution for 1 hour, the volume ratio of water, hydrogen peroxide and ammonia water is 5:1:1, and then rinse with deionized water Clean, dry with nitrogen, then soak in 3-aminopropyltriethoxysilane solution for 24h, 3-aminopropyltriethoxysilane solution refers to 3-aminopropyltriethoxysilane, absolute ethanol , deionized water, and acetic acid are prepared according to the volume ratio of 1:48:1:0.25, cleaned with ethanol, and dried with nitrogen for later use;

[0054] (2) Soak the pretreated glass ...

Embodiment 3

[0060] In this example, a SiO 2 A method for preparing a superhydrophobic coating on a glass surface, comprising the steps of:

[0061] (1) SiO 2 Glass pretreatment: Soak the glass in a mixed solution of 98% concentrated sulfuric acid and 30% hydrogen peroxide for 6 hours, the volume ratio of 98% concentrated sulfuric acid and 30% hydrogen peroxide is 2:1, use Rinse with deionized water, then soak in the mixed solution of water, hydrogen peroxide and ammonia water, boil the mixed solution for 1.2h, the volume ratio of water, hydrogen peroxide and ammonia water is 6:1:1, and then use deionized water Rinse well, blow dry with nitrogen, then soak in 3-aminopropyltriethoxysilane solution for 26h, 3-aminopropyltriethoxysilane solution refers to 3-aminopropyltriethoxysilane, anhydrous Ethanol, deionized water, and acetic acid are prepared according to the volume ratio of 1:48:1:0.25, cleaned with ethanol, and dried with nitrogen gas for later use;

[0062] (2) Soak the pretreated...

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Abstract

The invention relates to a method for preparing a superhydrophobic coating on the surface of SiO2 glass. According to the method, a micro-nano structure is constructed on the glass surface by means ofa layer-by-layer self-assembly approach, the glass after pretreatment is repeatedly soaked in a polyacrylic acid solution and a silver-modified polyetherimide solution separately to form a structurally stable multilayer film on the glass surface, and then the surface is coated with a hydrophobic coating to obtain the superhydrophobic coating. A process is simple, the cycle is short, the cost is low, and the stability and hydrophobicity of the superhydrophobic coating are good; it is found through a large number of experiments that the hydrophobicity of the multilayer film is good when the multilayer film has 8-14 layers. The hydrophobic coating contains silver and titanium dioxide nanoparticles, so that the superhydrophobic coating has high stability and a long-lasting antibacterial effect, and the addition of a certain quantity of the titanium dioxide nanoparticles helps to improve the roughness and hydrophobicity of the superhydrophobic coating.

Description

technical field [0001] The invention belongs to the technical field of superhydrophobic materials, in particular to a 2 Method for preparing superhydrophobic coating on glass surface. Background technique [0002] The surface of an object with a water contact angle greater than 90° is hydrophobic, while the surface of an object with a water contact angle above 150° is superhydrophobic. The superhydrophobic surface is not only hydrophobic but also oleophobic. The superhydrophobic surface has excellent performance, so it has broad application prospects in many fields, such as self-cleaning, anti-corrosion, anti-icing, drag reduction, and antifouling. However, the durability of artificial superhydrophobic surfaces is not good during actual use, and they are prone to lose superhydrophobic properties due to physical damage such as scratches and abrasions, which greatly limits the application of superhydrophobic materials. [0003] The hydrophobic mechanism of the superhydrophob...

Claims

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Application Information

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IPC IPC(8): C03C17/34
CPCC03C17/3405C03C2217/76C03C2218/111C03C2218/32
Inventor 郭思瑶罗惠华陈际洲刘杰牟犇张素磊万小梅
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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