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Graphene oxide/copper silicate composite powder, preparation method of composite powder and application thereof in super-hydrophobic coating

A composite powder and graphene technology, applied in chemical instruments and methods, coatings, carbon compounds, etc., can solve problems such as the inability of hydrophobic coatings to meet requirements, achieve large surface contact angles, mild reaction conditions and easy realization, and process technology. simple effect

Inactive Publication Date: 2017-09-05
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, with the development of the automobile industry, solar panels, and daily necessities (such as anti-icing mirrors, goggles), a single hydrophobic coating can no longer meet the needs

Method used

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  • Graphene oxide/copper silicate composite powder, preparation method of composite powder and application thereof in super-hydrophobic coating
  • Graphene oxide/copper silicate composite powder, preparation method of composite powder and application thereof in super-hydrophobic coating
  • Graphene oxide/copper silicate composite powder, preparation method of composite powder and application thereof in super-hydrophobic coating

Examples

Experimental program
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Effect test

Embodiment 1

[0043] 1) Preparation of graphene oxide / copper silicate composite powder: 0.05g of dodecyltrimethylammonium bromide, 120ml of ethanol was added to 50ml of deionized water to form a mixed solution, and then 0.01g of graphene oxide was dispersed in the above-mentioned In the mixed solution, ultrasonically disperse for 20 minutes to obtain a homogeneous suspension. Then 0.5ml tetraethyl orthosilicate was added to the above solution, and stirred continuously at room temperature for 5h. After centrifugation, washing with absolute ethanol and deionized water, and drying, 0.012 g of silica-coated graphene oxide was obtained. Then 10 mg of the prepared silicon oxide-coated graphene oxide was dispersed in 20 ml of deionized water, and ultrasonically dispersed for 20 min. Add ammonia water under slight stirring to adjust the pH to 10, and add 0.5ml 0.1mol / L copper acetate compound dropwise, continue stirring for 5min, transfer the mixed suspension to a stainless steel autoclave lined w...

Embodiment 2

[0046] Preparation of graphene oxide / copper silicate composite powder: add 0.03g sodium dodecylbenzenesulfonate, 120ml propanol to 30ml deionized water to form a mixed solution, and then disperse 0.01g graphene oxide in the above mixed solution , Ultrasonic dispersion for 40min to obtain a homogeneous suspension. Then 3ml of methyl orthosilicate was added to the above solution, and stirring was continued at room temperature for 6h. After centrifugation, washing and drying, 0.015 g of silicon dioxide-coated graphene oxide was obtained. Then, 10 mg of the prepared silica-coated graphene oxide was dispersed in 40 ml of deionized water, and ultrasonically dispersed for 40 min. Add ammonia water under slight stirring to adjust the pH to 10.8, and add 0.6ml 0.1mol / L copper nitrate and 0.9ml 0.1mol / L copper acetate dropwise, continue stirring for 5min, and transfer the mixed suspension to a polytetrafluoroethylene liner. In a stainless steel autoclave made of ethylene, keep warm at...

Embodiment 3

[0049] Preparation of graphene oxide / copper silicate composite powder: 0.5g of dodecyltrimethylammonium bromide, 120ml of n-butanol was added to 50ml of deionized water to form a mixed solution, and then 0.5g of graphene oxide was dispersed in the above In the mixed solution, ultrasonically disperse for 40min to obtain a homogeneous suspension. Then 2.5ml of isopropyl orthosilicate was added to the above solution, and stirred continuously at room temperature for 6h. After centrifugation, washing and drying, 1.8 g of silica-coated graphene oxide was obtained. Then 10 mg of the prepared silica-coated graphene oxide was dispersed in 10 ml of deionized water, and ultrasonically dispersed for 40 min. Add ammonia water under slight stirring to adjust the pH to 10, and add 3ml 0.1mol / L copper chloride and 2ml 0.1mol / L copper acetate dropwise, continue stirring for 5min, and transfer the mixed suspension to a polytetrafluoroethylene-lined In a stainless steel autoclave, heat preserv...

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Abstract

The invention discloses graphene oxide / copper silicate composite powder, a preparation method of the composite powder and application thereof in a super-hydrophobic coating. The graphene oxide / copper silicate composite powder with a micro-nano structure on the surface comprises a core formed by flake graphene oxide and a shell layer formed by needle-like nano copper silicate, wherein the needle-like nano copper silicate is arranged on the surface of the core in an array form. The super-hydrophobic coating is prepared by the following steps: coating the surface of a base material with the graphene oxide / copper silicate composite powder with the micro-nano structure on the surface, drying, and performing fluoroalkyl silane low-surface energy treatment, thereby obtaining the product. The preparation method disclosed by the invention is mild in reaction conditions, easy to realize and excellent in process repeatability; the prepared high-transparency, self-cleaning and anticorrosive super-hydrophobic coating has a static water drop contact angle of not less than 150 degrees; the slide angle does not exceed 1 degree; and the light transmissivity is not lower than 90% in a visible-ultraviolet light wave range. The product has excellent corrosion resistance and is expected to be widely applied to the fields of automobiles, spaceflight, solar cells, articles of daily use and the like.

Description

technical field [0001] The invention relates to a graphene oxide / copper silicate composite powder with a micro-nano structure on the surface, a preparation method thereof, and an application in a superhydrophobic coating. Background technique [0002] A superhydrophobic surface generally refers to a surface on which water droplets have a contact angle greater than 150 degrees and a rolling angle less than 10 degrees. It has excellent properties such as self-cleaning, anti-adhesion, anti-fog and antibacterial, waterproof, etc., which has attracted great attention and research interest. Existing studies have shown that the main factors affecting the wettability of solid surfaces are: 1. Surface free energy, 2. Surface roughness. Hydrophobic properties are enhanced when the surface free energy is reduced. However, even a smooth solid surface with the lowest surface energy has a contact angle with water of only close to 120 degrees. Moreover, since the surface energy is an in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/20C09D1/00C09D5/08C01B32/198B82Y30/00B82Y40/00
CPCC01B33/20B82Y30/00C01P2002/72C01P2004/04C01P2004/10C01P2004/20C01P2004/80C01P2006/10C09D1/00C09D5/08
Inventor 范萍陈静怡钟明强杨晋涛陈枫费正东
Owner ZHEJIANG UNIV OF TECH
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