Graphene heat dissipation coating and graphene heat dissipation material for aluminum electrolytic capacitor, and preparation methods thereof

Abstract

The invention relates to a graphene heat dissipation coating and graphene heat dissipation material for an aluminum electrolytic capacitor, and preparation methods thereof. The graphene heat dissipation coating for the aluminum electrolytic capacitor disclosed in the invention comprises a bottom-layer graphene heat dissipation coating and a surface-layer graphene heat dissipation coating, whereinthe bottom-layer graphene heat dissipation coating comprises, in percentage by weight, 30 to 65% of polyester resin, 0.5 to 10% of modified graphene oxide powder, 1 to 5% of a coupling agent, 5 to 15%of silicon carbide, 0.5 to 5% of a rheological agent, 0.1 to 2% of a dispersing agent and 10 to 45% of a solvent; and the surface graphene heat dissipation coating comprises, in percentage by weight,30-65% of epoxy resin, 0.5-10% of modified graphene oxide powder, 1-5% of a coupling agent, 5-15% of silicon carbide, 0.5-5% of a rheological agent, 0.1-2% of a dispersing agent and 10-45% of a solvent. According to the graphene heat dissipation coating for the aluminum electrolytic capacitor, a coating scattering material has excellent heat dissipation performance and stable performance, and heat dissipation capacity is greatly improved in a later period that the aluminum electrolytic capacitor is coated with the heat dissipation coating.

Description

technical field

[0001] The invention belongs to the field of heat dissipation materials, and in particular relates to a graphene heat dissipation coating for aluminum electrolytic capacitors, a graphene heat dissipation material and a preparation method thereof. Background technique

[0002] At present, with the large-scale popularization of aluminum electrolytic capacitors, it has become a trend for related electronic products to be miniaturized, high-powered, and highly integrated. Self-heating of aluminum electrolytic capacitors during operation During operation, due to the internal resistance (ESR) inside the electrolytic capacitor, the ripple current flowing through the capacitor will cause the capacitor to heat up. The temperature rise of the capacitor is proportional to the square of the ripple current and the equivalent series resistance ESR, and inversely proportional to the surface area and heat dissipation coefficient of the capacitor. Therefore, the magnitude of ...

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