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Preparation method of super-hydrophilic thin film based on glass surface

A glass surface and super-hydrophilic technology, which is applied in the field of super-hydrophilic films, can solve problems such as difficult to achieve large-area surface preparation, hydrophilicity cannot be maintained for a long time, and films are not wear-resistant, so as to achieve firm adhesion , small investment, simple process

Active Publication Date: 2013-01-30
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Surface treatment by electrochemical method is an effective method to obtain rough structure. The advantage of this preparation method is that it can obtain a highly hydrophilic surface without illumination, but its hydrophilicity can only last for one to two days, and this method Special instruments and equipment are required, and it is difficult to achieve the preparation of large-area surfaces
[0009] In the existing preparation methods, some need ultraviolet light, some need special equipment, some films are not wear-resistant, and some hydrophilicity cannot be maintained for a long time

Method used

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  • Preparation method of super-hydrophilic thin film based on glass surface

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Take 5ml of tetraethyl orthosilicate, 10ml of ethanol, and 2ml of deionized water, mix and stir for 5 minutes, then add 10ml of hydrochloric acid with a mass fraction of 5% dropwise, stir magnetically for 5 minutes, then add dilute ammonia water dropwise until the pH of the sol is 3, and continue stirring After 0.5h, the obtained SiO was diluted with ethanol solution at a volume ratio of 1:1 2 Sol. dilute SiO 2 5% PEG600 was added to the sol, ultrasonically oscillated, and then the mixed solution was used to wipe and coat the glass surface, followed by sintering at 450°C for 1h.

Embodiment 2

[0025] Take 5.5ml of tetraethyl orthosilicate, 10ml of ethanol, and 2.5ml of deionized water and mix and stir for 5 minutes, then add dropwise 10ml of hydrochloric acid with a mass fraction of 5.5%, magnetically stir for 5 minutes, and then add dropwise dilute ammonia water until the pH of the sol is 4. After continuing to stir for 0.5 h, dilute the SiO obtained by volume ratio 1:2 with ethanol solution 2 Sol. dilute SiO 2 10% PEG600 was added to the sol, ultrasonically oscillated, and then the mixed solution was used to wipe and coat the glass surface, followed by sintering at 490°C for 2h.

Embodiment 3

[0027] Take 6ml of tetraethyl orthosilicate, 15ml of ethanol, and 3ml of deionized water, mix and stir for 10 minutes, then add dropwise 15ml of hydrochloric acid with a mass fraction of 6%, stir magnetically for 10 minutes, then add dropwise dilute ammonia water until the pH of the sol is 5, and continue stirring After 1 h, the obtained SiO was diluted with ethanol solution at a volume ratio of 1:3 2 Sol. dilute SiO 2 15% PEG600 was added to the sol, ultrasonically oscillated, and then the mixed solution was used to wipe and coat the glass surface, followed by sintering at 520°C for 3h.

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Abstract

The invention provides a preparation method of a super-hydrophilic thin film based on a glass surface, relates to the super-hydrophilic thin film, and provides the preparation method of the super-hydrophilic thin film based on the glass surface, which has the advantages of simple needed equipment, few investment, wear resistance and long durability. The preparation method comprises the steps of: preparing SiO2 sol by an acid-alkali two-step method; diluting the SiO2 sol and adding polyethylene glycol; ultrasonically oscillating and coating the SiO2 sol on a glass substrate; and sintering to obtain the glass with the super-hydrophilic thin film on the surface. The preparation method has a simple process flow and few investment; and the obtained super-hydrophilic thin film has the characteristics that 1) light irradiation is not needed and the super hydrophilicity also exists at the hard part; 2) the super-hydrophilic thin film is super-hydrophilic and durable; the super-hydrophilic glass prepared by the method is placed indoors for three months and still has the super hydrophilicity after being detected; and 3) the bonding force of the film is firm and wear-resisting; and under the laboratory conditions, the thin film on the surface of the glass is forcedly brushed by a test tube brush and the result shows that the super-hydrophilic glass still has the super hydrophilicity.

Description

technical field [0001] The invention relates to a superhydrophilic film, in particular to a method for preparing a superhydrophilic film based on a glass surface. Background technique [0002] Due to its unique wetting behavior, special wetting surfaces have important applications in the fields of liquid transportation, coatings, waterproofing, construction and medical materials. As a typical special wetting surface, the super-hydrophilic surface (the contact angle with water is close to 0°) has the functions of anti-fog and self-cleaning, and has a wide range of applications in industrial production and real life, such as the front of the car. After adopting super-hydrophilic surface technology for the windshield and side windows, in rainy and cold weather, raindrops or small fog droplets spread quickly on the glass surface, so as not to affect the mirror imaging, visibility and light transmission of the glass rate effect. [0003] There are two main ways to prepare super...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/23
Inventor 周忠华沈开波阳欢黄悦
Owner XIAMEN UNIV
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