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Wear-resistant super-hydrophilic anti-reflecting coating

A super-hydrophilic and coating technology, applied in the field of super-hydrophilic anti-reflection coating, can solve the problems of high cost, high energy consumption, difficult to achieve, etc., and achieve good anti-reflection performance, simple preparation process, and simple equipment. Effect

Inactive Publication Date: 2012-11-28
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have their own limitations: method (1) needs to repeatedly spray surface-active agent on a regular basis and seems inconvenient; method (2) causes glass products to have poor abrasion resistance and heat resistance due to the use of organic substances; method ( In 3), it usually takes 7 to 10 minutes to evaporate water droplets by heating, and the timeliness is poor, and additional energy is required, and the energy consumption is large, so it is not practical; the device of method (4) is more complicated, has many components, and the cost is high (Liu Fu Shengcong, Li Yuping National Scientific and technological journal of building materials - "Glass" 2002, No. 3, 16-19)
Unfortunately the technology uses TiO 2 To improve the hydrophilicity of the surface of the substrate, it must be exposed to ultraviolet light to show good hydrophilicity. It is difficult to achieve this effect in a dark environment, and it has no real meaning. Superhydrophilic (contact angle less than 5 degrees), thus limiting its scope of application
In general, the current self-cleaning durability of these technologies is not ideal

Method used

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Examples

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Effect test

Embodiment 1

[0035] Wear-resistant super-hydrophilic anti-reflection coating: five layers of SiO with a particle size of 10-20nm 2 Nano particle composition, its preparation method comprises the following steps:

[0036] (1) Add 3mL of ammonia water and 100mL of absolute ethanol into the Erlenmeyer flask at room temperature and stir for 10 minutes, then stir at 60°C for 2 minutes, add 2mL of tetraethyl orthosilicate (TEOS) dropwise under stirring, and stir vigorously at 60°C for 10 minutes Hours, a translucent suspension was obtained containing SiO particles with a particle size of 10-20 nm. 2 Spherical small particle suspension, and dilute it with water into a suspension with a mass fraction of 0.1% to 1% for later use;

[0037] (2) Immerse the ordinary glass sheet into the newly prepared Pirhana solution (the H concentration is about 98%) 2 SO 4 with a mass concentration of about 30% H 2 o 2 5 to 20 minutes in the mixed solution mixed with a volume ratio of 7:3), take it out, wash i...

Embodiment 2

[0043] Wear-resistant super-hydrophilic anti-reflective coating: composed of six layers of SiO with a particle size of 20-30nm 2 Nano particle composition, its preparation method comprises the following steps:

[0044] (1) Add 4mL of ammonia water and 100mL of absolute ethanol into the Erlenmeyer flask at room temperature and stir for 10 minutes, then stir at 60°C for 2 minutes, add 2mL of tetraethyl orthosilicate (TEOS) dropwise under stirring, and continue stirring at 60°C for 12 Hours, a translucent suspension was obtained containing SiO particles with a particle size of 20-30 nm. 2 Spherical small particle suspension, and dilute it with water into a suspension with a mass fraction of 0.1% to 1% for later use;

[0045] (2) Immerse the ordinary glass sheet into the newly prepared Pirhana solution (the H concentration is about 98%) 2 SO 4 with a mass concentration of about 30% H 2 o 2 5 to 20 minutes in the mixed solution mixed with a volume ratio of 7:3), take it out, w...

Embodiment 3

[0051] Wear-resistant super-hydrophilic anti-reflection coating: composed of seven layers of SiO with a particle size of 30-40nm 2 Nano particle composition, its preparation method comprises the following steps:

[0052] (1) Add 4mL of ammonia water and 100mL of absolute ethanol into the Erlenmeyer flask at room temperature and stir for 10 minutes, then stir at 60°C for 5 minutes, add 3mL tetraethyl orthosilicate (TEOS) dropwise under stirring, and continue stirring at 60°C for 10 minutes Hours, a translucent suspension was obtained containing SiO particles with a particle size of 30-40 nm. 2 Spherical small particle suspension, and dilute it with water into a suspension with a mass fraction of 0.1% to 1% for later use;

[0053] (2) Immerse the ordinary glass sheet into the newly prepared Pirhana solution (the H concentration is about 98%) 2 SO 4 with a mass concentration of about 30% H 2 o 2 5 to 20 minutes in the mixed solution mixed with a volume ratio of 7:3), take it...

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Abstract

The invention relates to a wear-resistant super-hydrophilic anti-reflecting coating. The wear-resistant super-hydrophilic anti-reflecting coating disclosed by the invention is characterized in that: by using the advantages that a SiO2 surface is good in hydrophilicity and a silica film is lower in reflectivity, high in light transmittance and good in wear-resisting performance and the like, a rough-structured surface structure is constructed through a SiO2 spherical nanoparticle layer consisting of nanoparticles with particle sizes of about 10-40 nm, and the coating has super-hydrophilicity. The contact angle of water on the glass surface of the coating is 0 degree, and the light transmittance of sheet glass coated with the coating is increased from 91.3% to 99.0%. When water drops on the surface of glass coated with the coating, a droplet is flattened rapidly and uniformly and then evaporated without leaving any spots. The wear-resistant super-hydrophilic anti-reflecting coating disclosed by the invention has the technical advantages of simple preparation process, low cost, obvious effect, wide applicable scope and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a wear-resistant superhydrophilic anti-reflection coating. Background technique [0002] Self-cleaning glass refers to the special treatment of ordinary glass to make the surface super-hydrophilic or super-hydrophobic, so as to achieve the effect of not affecting mirror imaging, visibility and light transmittance of the glass. [0003] Self-cleaning glass can be classified into superhydrophilic self-cleaning glass (contact angle between glass surface and water is less than 5 degrees) and superhydrophobic self-cleaning glass (contact angle between glass surface and water is greater than 150 degrees, rolling angle less than 5 degrees), according to material classification can be divided into inorganic material coating self-cleaning glass and organic material coating self-cleaning glass. [0004] For self-cleaning glass coated with inorganic materials, if the inorg...

Claims

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Application Information

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IPC IPC(8): C03C17/42
Inventor 贺军辉许利刚
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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