Method for preparing particle-filled conductive thermoplastic polymer

Abstract

The invention provides a method for preparing a particle-filled conductive thermoplastic polymer, which belongs to the field of electromagnetic shielding material preparation. The method comprises the following steps of: firstly, preparing primary master batch of a carbon nanotube filled conductive thermoplastic polymer; secondly, preparing secondary master batch of a stainless steel fiber filled polymer; and finally, mixing the primary master batch, the secondary master batch and pure polymer master batch and performing co-injection molding on the mixture to obtain the conductive thermoplastic polymer material. The method has the characteristics of simple technical condition, easily controlled process, no residual impurities or reactant, low cost, high yield and convenient batch production. No agglomeration phenomenon occurs in the mixing process of the carbon nanotube primary master batch and the stainless steel fiber secondary master batch, so the composite material has uniformly distributed conductive filler, and the performance of the composite material is greatly improved. The method can be widely applied in the fields of civil and electric consumer products, such as consumer electronics, electrical appliance, communication devices, explosion protection safety products, information transfer and security, anti-static electricity, petrochemical industry and the like.

Description

technical field [0001] The invention belongs to the field of preparation of electromagnetic shielding materials, in particular to a method for preparing particle-filled conductive thermoplastic high polymers. Background technique [0002] In the era of rapid development of the electronics / microelectronics industry, conductive polymers (commonly known as conductive plastics), as electromagnetic shielding materials, are protective functional materials necessary to prevent electromagnetic wave pollution, and are new electronic materials in the current high-tech field. The chemical, physical and mechanical properties of materials will be improved and enhanced with the rapid development of electronic industry and communication technology. Conductive plastics, as a new type of organic functional polymer material introduced into the market after conductive coatings, have a great potential to catch up from behind. Research and development of new broadband, electromagnetic compatibil...

AI Technical Summary

Problems solved by technology

In order to mix better in this process, it is usually necessary to add a solvent capable of dissolving the polymer resin to the mixture, and the residual solvent needs to be removed in the later preparation process, which increases the complexity of the process, increases the difficulty of the process, and is prone to residual impurities

At the same time, carbon nanotubes and metal powder are prone to agglomeration. The conductive polymer made by the above process has uneven distribution of conductive powder and fibers, which greatly reduces the strength, electromagnetic shielding, and conductivity of the composite material.

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