Antistatic graphite composite polyamide plastics with high heat radiation and preparation method thereof

Abstract

Antistatic graphite composite polyamide plastics with high heat radiation of the invention comprise the following components by weight: 20-40 wt% of graphite, 40-60 wt% of polyamide; 10-20 wt% of water-soluble silicate which is the combination of any one or two substances of lithium silicate and sodium silicate; 1-8 wt% of hexagonal boron nitride; 2-5 wt% of bismaleimide; 0.5-2 wt% of silane coupling agents; 0.25-1 wt% of antioxidant 168; 0.25-1 wt% of antioxidant 1010. During processing, water-soluble silicate is mixed with graphite powder; high-temperature copolymerization is performed by the mixture and polyamide; microchannels for heat radiation are formed and are used for cross ventilation; thus high heat-radiation radiation transfer effect is generated, and the plastics are providedwith good heat radiation performance.

Description

technical field [0001] The invention relates to a high-viscosity polyamide composite material, in particular to an antistatic surface resistance index of c / m 2 10 10 High heat dissipation graphite composite polyamide plastic of Ω and preparation method thereof. Background technique [0002] With the rapid development of LED optoelectronics and electronic and electrical products, heat dissipation has increasingly become a bottleneck restricting the industrialization of electronic and electrical products. Especially with the development of high-power LED and other electronic appliances, heat dissipation has become the key to technological progress. [0003] At present, the heat dissipation of LED lamps mostly adopts the traditional metal aluminum system, which has excellent thermal conductivity, but due to the long-term oxidation of aluminum, the heat dissipation performance is not very good. In order to achieve the purpose of heat dissipation, the traditional metal aluminum ...

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Problems solved by technology

[0003] At present, the heat dissipation of LED lamps mostly adopts the traditional metal aluminum system, which has excellent thermal conductivity, but due to the long-term oxidation of aluminum, the heat dissipation performance is not very good. In order to achieve the purpose of heat dissipation, the traditional metal aluminum radiator needs to be designed as a honeycomb shape, which is not conducive to the miniaturization and production of radiators, and ceramic materials such as alumina and hexagonal boron nitride have two key characteristics, namely electrical isolation and heat conduction, but because ceramic materials need to be sintered, the radiator The shape design and the improvement of the yield rate have brought great problems

[0004] Graphite has low density, excellent thermal conductivity and heat dissipation, and the use of graphite materials to prepare heat sinks can greatly reduce the volume and weight of heat sinks, but because graphite is a solid powder, it is very difficult to form, which seriously restricts the scope of application of graphite materials , how to modify graphite so that radiators of different shapes can be easily obtained through injection molding, and greatly reduce processing costs and simplify processing technology has become a development direction of radiator materials and an urgent need for manufacturers to solve a technical problem of

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