Preparation method for conductive composite material

Abstract

A preparation method for a conductive composite material belongs to the field of material preparation. The method is characterized by comprising soaking graphene micro flakes and ultra-high-molecular-weight polyethylene powder in ethanol, performing ultrasonic dispersing by an ultrasonic cell crusher to form a uniformly distributed suspension; performing pumping filtration and vacuum drying to remove the ethanol solvent, so as to enable the graphene micro flakes to be uniformly adhered to the surfaces of the ultra-high-molecular-weight polyethylene particles; and finally, performing compression molding on the obtained substance, and then performing cooling under a constant pressure to a room temperature to obtain raw materials. Through the improvement of the preparation and production process, a more complete and stable effective conductive network structure is formed inside the conductive composite material, the seepage threshold of the material is greatly reduced, and the material has a highest peak resistivity and a relatively low room-temperature resistivity. The preparation method of the composite material disclosed by the present invention is simple in operation, simple in process, and suitable for promotion and use in related fields.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a preparation method of a conductive composite material. Background technique [0002] With the continuous improvement of living standards, people's pursuit of living materials is becoming more and more strict, and the requirements for many new products are getting higher and higher. To a certain extent, the corresponding production process is forced to be updated. With thermoplastic polymers as the matrix, carbon Black, carbon nanotubes, graphite, ene, and carbon fibers are conductive composite materials prepared as conductive fillers. Because of their soft texture, flexibility, easy processing, low manufacturing costs, and low room temperature resistivity, they can be used in relatively It is widely used as sensors, electromagnetic shielding materials and antistatic materials due to its low temperature and other advantages. Graphene microsheets are closely stacked by severa...

AI Technical Summary

Problems solved by technology

However, graphene microflakes have a two-dimensional layered structure with a large specific surface area, which makes it difficult to disperse uniformly in the polymer matrix, and causes agglomeration due to its large surface force.