▎ 摘　　要

NOVELTY - Preparing radiant heat dissipation coating comprises (1) adding 0.5-3 pts. wt. dispersant to water, stirring to dissolve, where the ratio of dispersant and water is 0.01-0.1 g/ml, then adding 10-30 pts. wt. nano-carbon material, and using ultrasonic dispersion to obtain dispersion liquid, (2) providing 60-100 pts. wt. binder and adding to water, heating to dissolve at 35-40degrees Celsius, where the ratio of binder and water is 0.1-0.5 g/ml, adding to dispersion, and ball milling with a ball mill to obtain mixed solution A, (3) providing 5-10 pts. wt. dopamine, and adding tris buffer solution to the mixed solution A, using a ball mill for ball milling to obtain mixed solution B, and (4) adding 0.3-1 pts. wt. leveling agent, 0.2-1 pts. wt. antifoaming agent and 0.5-1 pts. wt. thickening agent as auxiliary agents to mixed solution B, and using a ball mill for ball milling obtain uniform polydopamine-coated nanocarbon material composite radiative heat dissipation coating. USE - The method is useful for preparing radiant heat dissipation coating, which is used in a solar photovoltaic backplane (claimed) and solar photovoltaic panel used in solar panel power station for converting solar energy into electric energy. ADVANTAGE - The method: combines the nanometer carbon material with excellent thermal radiation performance and polydopamine to form the structure of the polydopamine coated nanometer carbon material; and provides radiation heat dissipation coating system with strong compatibility, strong interfacial bonding force and strong corrosion resistance.