Heat conduction graphene slurry and preparation method thereof

Abstract

The invention discloses a heat conduction graphene slurry and a preparation method thereof, and belongs to the technical field of heat conduction graphene materials. The heat conduction graphene slurry comprises graphene, a binder, N-methylpyrrolidone and a graphene aerogel anti-settling agent. The preparation method comprises the following steps: adding the binder to the N-methylpyrrolidone, uniformly stirring the binder and N-methylpyrrolidone to prepare a mixed solution, adding the graphene and graphene aerogel anti-settling agent to the mixed solution, and finally stirring the obtained mixed solution by a high shear disperser to obtain the stably-dispersed heat conduction slurry. The graphene aerogel is introduced as the anti-settling agent, and the graphene is uniformly and stably dispersed in the slurry, so the heat conduction coefficient of the slurry is remarkably improved, and the adhesion and the flexibility of the slurry are also obviously improved, and the graphene can forma continuous heat conduction network in a film formed after the solidification of the slurry in order to perform an excellent heat conduction effect. The heat conduction graphene slurry has the advantages of simple process, easiness in construction, strong adhesion and good heat dissipation effect.

Description

technical field [0001] The invention relates to the technical field of graphene heat-conducting materials, in particular to a graphene heat-conducting slurry and a preparation method thereof. Background technique [0002] With the acceleration of the upgrading of electronic products and the development of miniature, highly integrated and high-performance electronic equipment, the demand for heat dissipation management of electronic products is increasing. At present, graphite paper is used because of its high heat dissipation efficiency, small footprint, and light weight. As sealing materials for electronic equipment such as notebook computers, flat panel displays, digital cameras, and mobile phones, it is beneficial to improve the performance of electronic products. However, graphite paper is made of high-carbon phosphorus flake graphite through chemical treatment and high-temperature expansion and rolling, and the cost is relatively high. [0003] Graphene, since its disco...

AI Technical Summary

Problems solved by technology

However, this scheme uses high-temperature burning to combine the upper group of silane with the substrate. The combination of silane coupling agent and graphene will weaken the heat dissipation performance of graphene, and the cost and energy consumption of high-temperature sintering are relatively high. In addition, the silane coupling agent belongs to Silicone is prone to cracking under high temperature baking, which makes the sintering process more difficult

As for the sealing material of electronic equipment, it is not suitable for high-temperature processing because it needs to be bonded with electronic devices such as batteries. Therefore, it is urgent to develop a graphene thermally conductive paste suitable for sealing applications of precision and miniature electronic equipment.