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Transparent super-hydrophobic coating and preparation method thereof

A super-hydrophobic coating, transparent technology, applied in coatings and other directions, can solve problems such as fluorine pollution

Inactive Publication Date: 2017-03-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a transparent super-hydrophobic coating and a preparation method thereof, so as to solve the shortcomings of using fluorine-containing pollutants in the production process of the transparent super-hydrophobic surface, and finally obtain a super-hydrophobic coating with better transparency

Method used

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  • Transparent super-hydrophobic coating and preparation method thereof
  • Transparent super-hydrophobic coating and preparation method thereof
  • Transparent super-hydrophobic coating and preparation method thereof

Examples

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preparation example Construction

[0027] a. Preparation of octadecylamine-modified carbon nanotubes

[0028] The carbon nanotubes are sequentially modified with concentrated nitric acid (65% mass fraction), thionyl chloride, and octadecylamine to obtain octadecylamine-modified carbon nanotubes.

[0029] b. Preparation of coating solution

[0030] A certain amount of polydimethylsiloxane (PDMS: the product obtained by mixing Dow Corning 184 prepolymer and curing agent at a mass ratio of 10:1) was dissolved in tetrahydrofuran. Then take an appropriate amount of octadecylamine-modified carbon nanotubes and place them in a tetrahydrofuran solution, and sonicate for 15 minutes to obtain a uniformly dispersed coating solution. Wherein, the amount of PDMS and the amount of octadecylamine-modified carbon nanotubes are subject to the solubility.

[0031] c. Preparation of transparent superhydrophobic coating

[0032] Wash the glass substrate with acetone, distilled water, and ethanol in sequence, and dry it for late...

Embodiment 1

[0040] a. Preparation of octadecylamine-modified carbon nanotubes

[0041] The carbon nanotubes are sequentially modified with concentrated nitric acid (65% mass fraction), thionyl chloride, and octadecylamine to obtain octadecylamine-modified carbon nanotubes.

[0042] b. Preparation of coating solution

[0043] Dissolve PDMS in tetrahydrofuran, keep the concentration of PDMS in tetrahydrofuran at 0.1g / L, then take an appropriate amount of octadecylamine-modified carbon nanotubes in the solution, and keep the concentration of octadecylamine-modified carbon nanotubes in tetrahydrofuran 0.75g / L, ultrasonic 15min to obtain a uniformly dispersed coating liquid.

[0044] c. Preparation of transparent superhydrophobic coating

[0045] Wash the glass substrate with acetone, distilled water, and ethanol in sequence, and dry it for later use. Spray the obtained coating solution vertically on the glass surface, keep the spraying pressure at 0.4kPa, spraying at a distance of 10cm, an...

Embodiment 2

[0047] a. Preparation of octadecylamine-modified carbon nanotubes

[0048] The carbon nanotubes are sequentially modified with concentrated nitric acid (65% mass fraction), thionyl chloride, and octadecylamine to obtain octadecylamine-modified carbon nanotubes.

[0049] b. Preparation of coating solution

[0050] Dissolve PDMS in tetrahydrofuran, keep the concentration of PDMS in tetrahydrofuran at 0.2g / L, then take an appropriate amount of octadecylamine-modified carbon nanotubes in the solution, and keep the concentration of octadecylamine-modified carbon nanotubes in tetrahydrofuran 0.85g / L, ultrasonic 15min to obtain a uniformly dispersed coating liquid.

[0051] c. Preparation of transparent superhydrophobic coating

[0052] Wash the glass substrate with acetone, distilled water, and ethanol in sequence, and dry it for later use. Spray the obtained coating solution vertically on the glass surface, keep the spraying pressure at 0.5kPa, spraying at a distance of 15cm, an...

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Abstract

The invention relates to a super-hydrophobic coating having automatical cleaning performance, which is used for protecting the outdoor optical devices. According to the invention, PDMS is taken as a silicon source, multi-walled carbon nanotube is taken as a template, a silicon nanotube coating is constructed on the surface of the glass, then PDMS solidified through chemical vapor deposition performs hydrophobization treatment on the coating, and the transparent super-hydrophobic coating is finally obtained. The super-hydrophobic coating has the advantages of low cost of the raw materials, easy purchase of the raw materials, no involved fluorine-containing pollutant. The super-hydrophobic coating has good transmittance, in a visible light scope, the average light transmittance is greater than 83%. surface water contact angle is greater than 165 DEG, the roll angle is less than 3 DEG, the drops are easily rolled on the surface, the dust on the surface can be taken away, so that the super-hydrophobic coating has good automatical cleaning function. The super-hydrophobic coating can be used for solar cell panel, automobile wind screen glass, contact lens, transparent electrode, camera lens, and building exterior wall.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of functional coating preparation, in particular to a method for preparing a transparent super-hydrophobic coating on a glass substrate. [0003] 【Background technique】 [0004] The lotus leaf has a self-cleaning effect of "out of the mud without staining". If this principle is applied to the baking paint of the car, the outer wall of the building or the glass, it can not only keep the surface of the object clean at any time, but also reduce the amount of detergent. Environmental pollution can be said to be both safe and labor-saving. German biologist Barthlott and other researchers have studied the surface of nearly 300 kinds of plant leaves, and believe that this self-cleaning characteristic is caused by the micron-structured papillae on the rough surface and the hydrophobic waxy material on the surface. Afterwards, Jiang Lei's research group discovered that there are also nanostructures on the mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/42
CPCC03C17/42C03C2217/28C03C2217/70C03C2218/112C03C2218/152C03C2218/32
Inventor 薛朝华张磊贾顺田
Owner SHAANXI UNIV OF SCI & TECH
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