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Highly hydrophobic antistatic composite coating and preparation method thereof

A composite coating, high hydrophobic technology, applied in conductive coatings, epoxy resin coatings, chemical instruments and methods, etc., can solve environmental hazards and other problems, and achieve the effect of improving strength, easy availability of raw materials, and remarkable performance

Active Publication Date: 2017-12-26
上海帕吉索纳米技术有限公司
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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
  • 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 ...

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 paint and a preparation method thereof. Traditional hydrophobic materials mainly rely on the addition of fluoride to improve their hydrophobicity. In the present invention, graphite powder and sodium nitrate are added to concentrated sulfuric acid, potassium permanganate is added after stirring in an ice bath, distilled water is slowly added dropwise, and then excess potassium permanganate is removed, sulfate ions are filtered to obtain graphite oxide, which is added to organic In the solvent, the graphene oxide solution is prepared by ultrasonic treatment; the graphene oxide solution is sequentially added with isocyanic acid, long-chain modifiers, and a reducing agent to chemically modify the graphene oxide, washed and dried to obtain modified graphene; The resin is used as a matrix, and the modified graphene is uniformly dispersed by ultrasonic blending or rapid stirring to obtain a highly hydrophobic antistatic composite coating. The composite coating provided by the invention has both hydrophobicity and antistatic properties, does not contain any fluorine-containing substances, is environmentally friendly and has excellent 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 has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D133/00C09D175/04C09D5/24C09D5/00C09C1/46C09C3/08C09C3/06
Inventor 冯见艳张鹏罗晓民刘蕊
Owner 上海帕吉索纳米技术有限公司