Heat-conducting antistatic carbon fiber modified polyamide composite material and preparation method thereof

Abstract

The invention belongs to the technical field of heat-conducting composite materials and relates to a heat-conducting antistatic carbon fiber modified polyamide composite material. The composite material disclosed by the invention comprises the following components by weight percent: 5-40% of asphalt-based carbon fiber, 50-85% of polyamide resin, 1-10% of compatilizer, 5-15% of graphite micropowder and 0.1-1% of processing aid. The asphalt-based carbon fiber is subjected to surface treatments as follows: (1), oxidizing the surface of the asphalt-based carbon fiber for 2-24 hours at the temperature of 60-120 DEG C by using an oxidant; and (2) filtering out the asphalt-based carbon fiber treated in the step (1), washing the asphalt-based carbon fiber with distilled water until the distilled water is neutral, and drying the asphalt-based carbon fiber at the temperature of 80-150 DEG C; and carrying out seal standing for 2-5 hours in a treatment liquid at room temperature and then drying. The composite material disclosed by the invention is less in addition amount and simple in processing step and has a heat-conducting function, and simultaneously, the mechanical and antistatic properties of the material are improved.

Description

technical field

[0001] The invention belongs to the technical field of heat-conducting composite materials, and relates to a heat-conducting and antistatic carbon fiber modified polyamide composite material and a preparation method thereof. Background technique

[0002] Traditional thermally conductive plastics use graphite, boron nitride or aluminum nitride. The blending of powder and plastic resin has disadvantages such as large amount of addition and difficulty in addition, and with the increase of additives, the overall performance of the material decreases and the density increases, which still faces difficulties in practical application. With the continuous research and development of new material technology, high-tech carbon fiber modified composite materials are not only used in high-end aerospace, military weapons and other fields, but are increasingly used in general industrial fields. Such as the automobile industry, sporting goods industry, textile machinery ind...