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Highly hydrophobic antistatic composite coating and preparation method thereof

A highly hydrophobic, composite coating technology, applied in conductive coatings, epoxy resin coatings, chemical instruments and methods, etc., can solve problems such as environmental hazards, and achieve the effects of improved strength, environmental friendliness, and easy availability of raw materials

Active Publication Date: 2014-11-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional hydrophobic materials mainly rely on the addition of fluoride to improve their hydrophobicity, but because fluoride is difficult to degrade in the biological world, its harm to the environment is gradually revealed

Method used

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  • Highly hydrophobic antistatic composite coating and preparation method thereof
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preparation example Construction

[0043] The above-mentioned preparation methods of graphene oxide are not limited to the modified hummer method and Staudenmair et al.

[0044] Step 2: Modification of graphene:

[0045] Take graphite oxide and add it to an organic solvent (selected from acetone, N,N-pyrrolidone, N,N-dimethylformamide) to achieve a mass volume fraction of 2~10mg / ml, ultrasonic treatment for 1~3 hours, and prepare Graphene oxide solution;

[0046] Add isocyanate (selected from 4,4-dicyclohexylmethane diisocyanate, isophorone diisocyanate, 1,6-hexyl diisocyanate, dicyclohexylmethane diisocyanate, xylylene diisocyanate, isocyanate), the amount added is 100%~500% of the mass of graphene oxide, stirred and reacted for 10~24h under nitrogen protection, and the temperature is 70~90°C; then add long-chain modified substances (selected from octadecylamine, cetyl According to, dodecylamine, stearyl alcohol), the amount added is 2~4 times of the molar amount of isocyanate, and the reaction is continued ...

Embodiment 1

[0052] Step 1: the preparation of graphite oxide:

[0053] Take 2.0g of graphite powder and 1.0g of sodium nitrate and add it to 46ml of concentrated sulfuric acid (mass fraction 98%), and place the mixture in an ice bath and stir for 30min;

[0054] Weigh 6.0g of potassium permanganate and slowly add to the above mixture, and stir rapidly for 2 hours at a temperature not higher than 5°C;

[0055] Move the mixture into a warm water bath at 35°C and continue stirring for 3 h;

[0056] Slowly add 90ml of distilled water to the mixture, and control the temperature at 98°C for 30 minutes;

[0057] Cool to room temperature, add hydrogen peroxide with a mass fraction of 30%, remove excess potassium permanganate until the mixed solution turns bright yellow;

[0058]Add 150ml of distilled water to dilute and filter while it is hot, wash with hydrochloric acid with a molar concentration of 0.01mol / l, absolute ethanol, and deionized water in sequence until there is no sulfate ion in t...

Embodiment 2

[0068] Step 1: the preparation of graphite oxide:

[0069] Take 3.5g of graphite powder and 1.5g of sodium nitrate and add it to 53ml of concentrated sulfuric acid (mass fraction 98%), and place the mixture in an ice bath and stir for 45min;

[0070] Weigh 10.5g of potassium permanganate and slowly add to the above mixture, and stir rapidly for 3.5h at a temperature not higher than 5°C;

[0071] Move the mixture into a warm water bath at 35°C and continue to stir for 4.5 hours;

[0072] Slowly add 120ml of distilled water to the mixture, and control the temperature at 98°C for 45 minutes;

[0073] Cool to room temperature, add hydrogen peroxide with a mass fraction of 30%, remove excess potassium permanganate until the mixed solution turns bright yellow;

[0074] Add 225ml of distilled water to dilute and filter while hot, wash with hydrochloric acid with a molar concentration of 0.01mol / l, absolute ethanol, and deionized water in sequence until there is no sulfate ion in th...

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Abstract

The invention relates to a highly hydrophobic antistatic composite coating and a preparation method thereof. The hydrophobicity of a conventional hydrophobic material is improved mainly by adding fluorine-containing substances. The preparation method comprises the following steps: adding graphite powder and sodium nitrate into concentrated sulfuric acid, stirring in an ice bath, adding potassium permanganate, slowly dropwise adding distilled water, removing excessive potassium permanganate, filtering sulfate ions to obtain oxidized graphite, adding the oxidized graphite into an organic solvent, and ultrasonically processing to prepare an oxidized graphene solution; adding isocyanic acid, a long-chain modified substance and a reducer into the oxidized graphene solution in sequence to chemically modify oxidized graphene, washing and drying to obtain modified graphene; by taking resin as a base body, uniformly dispersing the resin and the modified graphene through ultrasonic blending or quick stirring to obtain the highly hydrophobic antistatic composite coating. The composite coating provided by the invention has hydrophobic and antistatic performances, does not contain the fluorine-containing substances, and is environment-friendly and excellent in durability.

Description

technical field [0001] The invention relates to a functional coating, in particular to a highly hydrophobic antistatic composite coating and a preparation method thereof. Background technique [0002] Highly hydrophobic coatings are widely used in anti-fouling coating, oil-water separation, waterproof and anti-icing operations and other fields in harsh climates due to their good self-cleaning and hydrophobic properties. With the technological update of water tools, the rapid development of the petroleum industry, and the response to power transmission under extreme weather, the research and development of highly hydrophobic antistatic composite coatings has important application value. [0003] Graphene is made of sp 2 A two-dimensional monoatomic layer structure of carbon atoms in a honeycomb lattice. Has excellent mechanical properties, as well as charge transport and thermal conductivity properties. Especially in the field of multifunctional composite materials, it ha...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D133/00C09D175/04C09D5/24C09D5/00C09C1/46C09C3/08C09C3/06
Inventor 罗晓民张鹏冯见艳刘蕊
Owner SHAANXI UNIV OF SCI & TECH
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