High-performance aqueous graphene paint and preparation method thereof

A water-based graphene and conductive coating technology, applied in conductive coatings, polyester coatings, coatings, etc., can solve the problems of difficulty in simultaneously improving conductivity and mechanical properties, and high density of conductive coatings.

Inactive Publication Date: 2013-06-05
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems that the existing conductive coatings have high density and difficult to simultaneously improve the electrical conductivity and mechanical properties, the invention provides a high-performance water-based graphene conductive coating and a preparation method thereof

Method used

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  • High-performance aqueous graphene paint and preparation method thereof

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Effect test

Embodiment 1

[0024] Under ice bath conditions, 3.0g of graphite was added to 60ml of concentrated sulfuric acid, stirred vigorously for 30min, and further 12gKMnO 4 Add to the above mixture and stir vigorously for 30min. Transfer the above mixture to a 30°C water bath, slowly add 18g NaNO 3 , stirred for 60min; while stirring, continuously added 140ml of deionized water to the above mixture, then transferred it to an oil bath at a temperature of 90°C, stirred for 30min; then added 18ml of H 2 o 2 , continue to react for 60min to make the solution change from dark brown to bright yellow;

[0025] Under stirring conditions, add 1.5wt% graphene oxide dispersing agent PVP to the above graphene oxide solution, add dropwise 20ml of hydrazine hydrate solution after dissolving, react at 60°C for 1h, and further dissolve in the above solution 20ml of 20wt% acetic acid aqueous solution was added dropwise, and the reaction was continued for 30min to obtain a stable graphene aqueous solution. Add ...

Embodiment 2

[0027] Under ice bath conditions, 3.0g of graphite was added to 60ml of concentrated sulfuric acid, stirred vigorously for 30min, and further 12gKMnO 4 Add to the above mixture and stir vigorously for 30min. Transfer the above mixture to a 30°C water bath, slowly add 18g NaNO 3 , stirred for 60min; while stirring, continuously added 140ml of deionized water to the above mixture, then transferred it to an oil bath at a temperature of 90°C, stirred for 30min; then added 18ml of H 2 o 2 , continue to react for 60min to make the solution change from dark brown to bright yellow;

[0028] Under stirring conditions, add 2.5wt% graphene oxide dispersing agent PVA to the above graphene oxide solution, dissolve and add 20ml of hydrazine hydrate solution dropwise, react at 80°C for 1h, and further dissolve in the above solution 20ml of 10wt% acetic acid aqueous solution was added dropwise, and the reaction was continued for 40min to obtain a stable graphene aqueous solution. Add 11wt...

Embodiment 3

[0030] Under ice bath conditions, 3.0g of graphite was added to 60ml of concentrated sulfuric acid, stirred vigorously for 30min, and further 12gKMnO 4 Add to the above mixture and stir vigorously for 30min. Transfer the above mixture to a 30°C water bath, slowly add 18g NaNO 3 , stirred for 60min; while stirring, continuously added 140ml of deionized water to the above mixture, then transferred it to an oil bath at a temperature of 90°C, stirred for 30min; then added 18ml of H 2 o 2 , continue to react for 60min to make the solution change from dark brown to bright yellow;

[0031]Under stirring conditions, add 2.5wt% graphene oxide dispersing agent PEG to the above graphene oxide solution, dissolve and add 20ml of hydrazine hydrate solution dropwise, react at 80°C for 1h, and further dissolve in the above solution 20ml15wt% acetic acid aqueous solution was added dropwise, and the reaction was continued for 50min to obtain a stable graphene aqueous solution. Add 15wt% wat...

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Abstract

The invention discloses high-performance aqueous graphene paint and a preparation method thereof. The preparation method of the high-performance aqueous graphene paint comprises the following steps of: oxidizing natural graphite in an oxidant, adopting a two-step chemical reduction method to obtain organic molecule-modified graphene aqueous solution; and adding polyester, a neutralizing agent, a flatting agent, an antifoaming agent, a cross-linking agent and a catalyst by adopting a solution co-mixing method to obtain aqueous graphene paint. A conductive coating with high conductive performance and mechanical performance is obtained by carrying out spray-coating, ink-jet printing and printing on the obtained paint, the conductive coating can be applied to the field such as electromagnetic shielding, static electricity preventing, corrosion preventing, radiating, wear-resisting and electronic circuits, and therefore, the application value is extensive.

Description

technical field [0001] The invention relates to a water-based graphene conductive coating and a manufacturing method thereof. Background technique [0002] Conductive coatings are a new type of functional coatings that are applied on substrates such as non-conductive polymer materials to enable them to conduct current and eliminate accumulated static charges. The conductivity after coating is generally greater than 10S / m, and has been widely used. To various fields, such as the conductive connection of integrated circuit components, the connection of non-solderable places, plastic brackets for shielding high-frequency magnetic fields, invisible materials for aircraft, conductive films, etc. In addition, conductive coatings also have great use value in the electronic market, such as PCB design and repair, car defogging heating wire disconnection repair, keyboard printed circuit repair, etc. [0003] At present, conductive coatings can be divided into structural conductive co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/24C09D167/00
Inventor 方岱宁孙友谊张用吉池慧娟唐敬达周志利
Owner PEKING UNIV
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