A kind of thermally conductive plastic using modified carbon material and preparation method thereof

Abstract

The invention discloses thermal conductive plastic applying a modified carbon material, and a preparation method thereof. The thermal conductive plastic comprises the following components in percentage by mass: the modified carbon material, magnesium oxide, boron nitride, nylon 66, a polyanionic type high polymer, a dispersing agent, and a couplant, wherein the modified carbon material comprises the following components in parts by weight: a base carbon material, a surfactant, a polycationic type high polymer, and a couplant; the modified carbon material is prepared by the steps of: mixing water, the base carbon material, sodium chloride, the surfactant and the couplant according to a proportion and then performing ultrasonic treatment, slowly adding the polycationic type high polymer during the ultrasonic process, continuously performing ultrasonic treatment and then stirring for 20-24h, filtering and drying. According to the thermal conductive plastic applying the modified carbon material, and the preparation method thereof, the problem that the materials inside the plastic are mixed unevenly can be effectively solved, and the compatibility of the carbon material can be improved greatly; the dispersity of the whole material mixture can be enhanced, and plugging is difficult in the extrusion process; the synthetic technology is simple, and the conditions of high temperature, a strongly corrosive environment and the like are not required.

Description

【Technical field】 [0001] The invention relates to a heat-conducting plastic and a preparation method thereof, in particular to a heat-conducting plastic using a modified carbon material and a preparation method thereof, belonging to the technical field of inorganic non-metallic materials. 【Background technique】 [0002] Polymer materials have the characteristics of insulation, light weight, corrosion resistance, fatigue resistance and easy molding, and are now widely used in the field of electronic information. However, due to its relatively low thermal conductivity, pure polymer materials restrict the wide application in some fields to a certain extent. Especially in the ever-growing electronic information industry, more and more lightweight electronic products have resulted in increasingly compact internal structures, which put forward very high requirements for the heat dissipation performance of the polymer materials filled inside. [0003] Carbon materials, especially ...

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Problems solved by technology

[0006] Chinese patent application number: 200710044603.1 introduces a method of carbon fiber modified plastics. The modified plastics produced by this method have obvious improvement in various physical strengths, but because only a coupling agent is added, the carbon fiber is changed. Poor effect of surface properties, resulting in localized inhomogeneous mixing

[0007] Chinese patent application number: 200810010571.8 introduces a new synthesis method of polymer thermally conductive plastics, but because no coupling agent is added to it, or the surface of the carbon material is modified, the synthesis effect is not good, and the internal carbon material accumulates seriously

However, after actual testing, the surface of carbon fiber treated in this way is relatively smooth and not easy to cover any substances

[0009] Most of today's plastics are made by fully mixing various materials into the extruder, and using the spiral sample feeding channel in the extruder for heating and blending. However, due to its special nano-performance, nano-carbon materials, ordinary, Untreated blending is impossible to fully mix nano-carbon materials, which often leads to the phenomenon that the produced plastic has excellent local thermal conductivity and poor local thermal conductivity.

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