Conductive heat-conductive graphene slurry and coating

Abstract

The invention relates to a conductive heat-conductive graphene slurry and a coating. The conductive heat-conductive graphene slurry comprises the following raw materials: 0.1-90wt% of conductive heat-conductive graphene slurry ( consisting of 3-20wt% of less graphene, 0-80wt% of base solvent, 0-80wt% of base resin), 0-60wt% of filler, 0-10% of dispersing agent, 10-60wt% of resin, 10-60wt% of curing agent, and 30-70wt% of solvent, wherein not only can the graphene slurry be antistatic, conductive and heat-conducting despite of less addition amount, but also the surface of a coated article is smoother and finer, firmer and more durable; compared with the addition amount of the existing conductive material, the conductive heat-conductive graphene slurry is lower in addition amount and can also reach lower resistivity.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a conductive and thermally conductive graphene slurry and coating. Background technique [0002] Conductive and heat-conductive coating is a kind of functional material that has emerged with the rapid development of coating industry and modern industry in recent years. The film-forming substrate is generally insulating. In order to make the coating have electrical and thermal conductivity, the common method is to add conductive and thermal particles. Conductive and thermally conductive coatings have important practical value in the electronics industry, automobile industry, storage and transportation of natural gas and oil products, aerospace and other aspects. [0003] Conductive carbon black, graphite, conductive mica, metals (gold, silver, copper, nickel), and carbon fiber are the traditional conductive and thermal conductive materials currently used in the mai...

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Problems solved by technology

[0003] Conductive carbon black, graphite, conductive mica, metals (gold, silver, copper, nickel), and carbon fiber are the traditional conductive and thermal conductive materials currently used in the mainstream of conductive coatings. Carbon materials have the characteristics of good chemical stability and small particles, which can effectively However, because carbon black is an amorphous spherical carbon structure with a low aspect ratio, although it forms a conductive network, the network interface is point-to-point contact, so the resistance value is still relatively high. Higher than graphite; graphite is another mainstream conductive material, which has excellent chemical stability like carbon black, but its particle size is much larger than carbon black and its aspect ratio is not high. Therefore, under the same addition amount, It is difficult to form a complete conductive network like carbon black; in electronics, LED, solar energy and other industries, the mainstream conductive materials used are metal (gold, silver, copper, nickel) materials, whose electrical and thermal conductivity are better than carbon materials, but Poor chemical stability (copper, nickel), and expensive (gold, silver); carbon nanotubes and nanocarbon fibers are relatively new types of conductive materials, which have lower resistance values ​​and higher aspect ratios than graphite, theoretically It should have the best electrical conductivity, but its disadvantages such as difficulty in dispersing, low purity, metal pollution, and high price greatly increase the difficulty in practical use, which has become the reason why this type of conductive material has not been popularized in large quantities

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