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Hydrophobic and oleophobic silica-based translucent coating film and preparation method thereof

A silica-based, light-transmitting coating technology, applied in the field of self-cleaning optical materials and new materials, can solve the problems of harsh operating conditions, expensive equipment, complex process routes, etc., to simplify the production process, facilitate industrial production, simple craftsmanship

Inactive Publication Date: 2014-07-30
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the process routes involved in the literature are usually complicated, the equipment used is expensive, and the operating conditions are harsh.

Method used

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  • Hydrophobic and oleophobic silica-based translucent coating film and preparation method thereof
  • Hydrophobic and oleophobic silica-based translucent coating film and preparation method thereof
  • Hydrophobic and oleophobic silica-based translucent coating film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] This example is the preparation of a hydrophobic and oleophobic silica-based light-transmitting coating film. The specific process is: use concentrated sulfuric acid (98wt%) and hydrogen peroxide (30wt%) aqueous solution to prepare a glass washing solution at a volume ratio of 3:1, soak the glass substrate in the glass washing solution for 5 minutes, and then wash it in deionized water and acetone respectively. Ultrasonic for 20 minutes, then treated with 5 mol / L sodium hydroxide aqueous solution at room temperature for 5 minutes, washed with deionized water, and dried by blasting at room temperature to obtain an activated glass substrate; take 40 mL of absolute ethanol, divide it into two parts, and add 2 mL of orthosilicon to one part Acid ethyl ester (Si(OCH 2 CH 3 ) 4 ), add 1mL glacial acetic acid (AR) dropwise while stirring, and stir for 1h to obtain solution A; add 8mL concentrated ammonia water (25wt%) to another part of absolute ethanol, stir well to obtain ...

Embodiment 2

[0023] This example is the preparation of a hydrophobic and oleophobic silica-based light-transmitting coating film. The specific process is: use concentrated sulfuric acid (98wt%) and hydrogen peroxide (30wt%) aqueous solution to prepare a glass washing solution at a volume ratio of 3:1, soak the glass substrate in the glass washing solution for 5 minutes, and then wash it in deionized water and acetone respectively. Ultrasonic for 20 minutes, then treated with 5 mol / L sodium hydroxide aqueous solution at room temperature for 5 minutes, washed with deionized water, and dried by blasting at room temperature to obtain an activated glass substrate; take 60 mL of absolute ethanol, divide it into two parts, and add 3 mL of orthosilicon to one part Acid ethyl ester (Si(OCH 2 CH 3 ) 4), add 1mL glacial acetic acid (AR) dropwise while stirring, and stir for 2 hours to obtain solution A; add 9mL concentrated ammonia water (25wt%) to another part of absolute ethanol, and stir evenly ...

Embodiment 3

[0025] This example is the preparation of a hydrophobic and oleophobic silica-based light-transmitting coating film. The specific process is: use concentrated sulfuric acid (98wt%) and hydrogen peroxide (30wt%) aqueous solution to prepare a glass washing solution at a volume ratio of 3:1, soak the glass substrate in the glass washing solution for 5 minutes, and then wash it in deionized water and acetone respectively. Ultrasonic for 20 minutes, then treated with 5 mol / L sodium hydroxide aqueous solution at room temperature for 5 minutes, washed with deionized water, and air-dried at room temperature to obtain an activated glass substrate; take 50 mL of absolute ethanol, divide it into two parts, and add 4 mL of orthosilicon to one part Acid ethyl ester (Si(OCH 2 CH 3 ) 4 ), add 1mL glacial acetic acid (AR) dropwise while stirring, and stir for 1.5h to obtain solution A; into solution B, and stirred for 1.5 hours to obtain a double-particle-diameter nano-silica sol; to the o...

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Abstract

The invention relates to a hydrophobic and oleophobic silica-based translucent coating film and a preparation method thereof, belongs to the field of novel materials, in particular relates to the field of self-cleaning optical materials. The preparation method is characterized in that silica nanoparticle sol with two types of grain sizes is prepared by using a one-pot method, a micro nanometer composite double-stage rough structure required by water and oil repellency is obtained by one-step spin coating, the hydrophobic and oleophobic silica-based translucent coating film is prepared after modification of a fluorocarbon surfactant, processing steps are greatly simplified, and the film thickness, the proportion of large and small-sized structures, space filling factors and the like are easily adjusted and controlled by sol generation conditions and the addition proportion of pore-foaming agents, so that the high-performance hydrophobic and oleophobic silica-based translucent coating film is conveniently and reliably prepared; and the process is simple, the industrial production is very facilitated, the obtained coating film reaches the super-hydrophobic and super-oleophobic standard and particularly has excellent light transmittance, and high light transmittance and super-hydrophobic and super-oleophobic balance are better realized.

Description

Technical field [0001] A hydrophobic and oleophobic silica-based light-transmitting coating film and a preparation method thereof. The invention belongs to the field of new materials, especially the field of self-cleaning optical materials. Specifically, it relates to a hydrophobic and oleophobic silica-based light-transmitting coating film and its preparation. Background technique [0002] Superhydrophobic surfaces are common in nature, such as plant leaves, water strider feet, spider silk, butterfly wings, watermelon rinds, moth eyes, etc. Water forms small droplets on these surfaces with a contact angle exceeding 150°, which will roll off quickly if the surface is slightly tilted. Surface pollutants such as dust can be carried away by rolling water droplets without leaving any traces. This surface self-cleaning effect is called the "lotus leaf effect". Studies have shown that the superhydrophobicity of lotus leaves is produced by the combined action of papillae with a m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/23
Inventor 顾文秀杨光东邹路易刘世伟李磊王玉如卢先领陈凤凤
Owner JIANGNAN UNIV
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