Graphene conductive coating and preparation method thereof

Abstract

The invention relates to a graphene conductive coating and a preparation method thereof. The graphene conductive coating comprises the following components in parts by weight: 0.01-10 parts of graphene, 1-30 parts of an alcohol-soluble coating, 20-50 parts of a diluent, 0.5-5 parts of a dispersing agent, 0.5-5 parts of a stabilizer and 0.1-1 part of a defoaming agent. The preparation method comprises the following steps: by taking the graphene as a conductive component and taking the alcohol-soluble coating as a film forming matter, adding other aids, grinding, performing ultrasonic oscillation, and performing film filtration, thereby obtaining a conductive coating in a uniform system. The alcohol diluent has an effect of diluting the coating, dispersion of the graphene is promoted, the dispersity of the graphene is effectively improved, and the graphene can stably exist for a long time. The types and amount of the diluent, dispersing agent and other aids are adjusted, so that the viscosity of the coating is controlled, the subsequent spraying, brushing and coating process is conveniently implemented, large-scale production is easily realized, and the graphene conductive coating is expected to be applied to the fields such as mobile phones, flat-panel displays, solar cells, transparent electromagnetic wave shielding and automotive window heat-conducting glass.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a graphene conductive paint and a preparation method thereof. Background technique [0002] Conductive coating is a special functional coating developed rapidly with modern science and technology. Conductive coatings are applied to non-conductive base materials by spraying, brushing and coating processes, so that they can conduct current and eliminate accumulated static charges. Coatings The conductivity of the formed coating is generally greater than 10S / m. At present, conductive coatings have been applied in various military and civilian industrial fields such as electronics, electrical appliances, aviation, chemical industry, and printing. [0003] In 1948, the United States first published the patent of making conductive adhesive from silver and epoxy resin, and our country also began to research and apply conductive paint in the 1950s. Correspondingly, the th...

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Problems solved by technology

However, due to the large surface area of ​​a single sheet of graphene, graphene is prone to agglomeration during the preparation of graphene conductive coatings, which affects its conductivity and light transmission, and its application is greatly limited.

[0004] The patent application number 201410422381.2 discloses a conductive and thermally conductive graphene slurry and coating, but the coating system is easy to layer and cannot maintain a uniform and stable existence for a long time, which greatly affects the gloss and mechanical properties of the coating; the application number is The patent of 201210556682.5 also discloses a conductive coating. In order to make the coating system uniformly dispersed, functionalized graphene containing amino groups or functionalized graphene containing mercapto groups is introduced, which not only increases the production cost of the coating, but also does not fundamentally To improve the dispersibility of coatings, therefore, it is urgent to develop a graphene thermally conductive coating with low industrial cost, good dispersibility and high light transmittance

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