Preparation method of graphene modified high-solid-content high-temperature-resistant epoxy heat-conducting functional coating

Abstract

The invention relates to a preparation method of a graphene modified high-solid-content high-temperature-resistant epoxy heat-conducting functional coating, belongs to the technical field of coating new materials, and also relates to the technical field of application of a graphene new material. The preparation method comprises preparation of priming paint and preparation of finishing paint, and is characterized in that a small layer of graphene dispersing slurry is added during preparation of the priming paint and the finishing paint separately. The coating product is an oily high-solid-content system, does not contain water, but contains a small amount of volatile environment-friendly cosolvents (the discharge reaches to the standard). The most important characteristics of the product are as follows: the heat tolerance of a paint film reaches to 250 DEG C, the product can be on active service for a long time under the working condition of 200 DEG C, the hardness of the dry paint film reaches to 5 to 6H, the heat-conducting rate reaches to 265 W / m.K, the dirt coefficient is 10 times lower than the national standard, and the coating does not have any change after being soaked into an erosion-resistant medium for 30 days.

Description

technical field [0001] The invention belongs to the technical field of new coating materials, and also relates to the technical field of application of graphene new materials. Background technique [0002] Since the research team of Andre K. Geim (Andre K. Geim) at the University of Manchester in the United Kingdom prepared graphene in 2004 and won the Nobel Prize in Physics in 2010, graphene has become a new term in the scientific and technological circles and Hot new material. The advent of graphene has caused a research boom all over the world. [0003] At present, there are many methods for researching and preparing graphene, such as micromechanical exfoliation method, orientation epitaxy method (crystal film growth method), liquid / gas phase direct exfoliation method, heating SiC method, chemical vapor deposition method, chemical dispersion method, oxidation method, etc. -Reduction methods, and more recently solvent stripping and solvothermal methods, etc. [0004] Fo...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of these traditional coating products is the lack of functional characteristics, that is, although the coating has achieved corrosion resistance, its high temperature resistance is not enough (≤120°C), and its thermal resistance is large (generally, the thermal conductivity of the coating is 118-125W / m· K), anti-scaling efficiency (fouling coefficient ≤ 0.086m stipulated in national standards 2 ℃ / KW, general anti-corrosion coating can not reach)

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