Method for preparing conductive macromolecular composite material with isolation structure

Abstract

The invention belongs to the technical field of conductive macromolecular materials and particularly relates to a method for preparing a conductive macromolecular composite material with an isolation structure. The invention provides the method for preparing the conductive macromolecular composite material with the isolation structure. The preparation method comprises the following steps: uniformly mixing two macromolecular materials and conductive particles by adopting a mechanical blending method to obtain a macromolecular material / conductive particle blending material, wherein the conductive particles are selectively distributed between interfaces of the two macromolecular materials to form a conductive network; and then, injection moulding the macromolecular material / conductive particle blending material by adopting a plunger injection moulding device to prepare the conductive macromolecular composite material with the isolation structure. According to the method provided by the invention, the conductive particles are selectively distributed between the two macromolecules to form the conductive network so as to form the so-called isolation structure, thus the percolation threshold of the material is reduced to a great extent. The invention provides a new concept for preparing the conductive macromolecular composite material which is low in percolation threshold, good in processing performance and extremely high in moulding efficiency.

Description

technical field [0001] The invention belongs to the technical field of conductive polymer materials, and in particular relates to a method for preparing a conductive polymer composite material with an isolation structure. Background technique [0002] As a functional polymer composite material, conductive polymer material expands the application range of polymer materials. Conductive polymer materials have become one of the research hotspots in the field of materials because they are widely used in antistatic materials, electrostatic shielding materials, self-temperature control materials and aerospace and other fields. Conductive polymer materials are divided into composite conductive polymer materials and structural conductive polymer composite materials according to different preparation methods. Conductive polymer composites (CPCs) are based on high molecular polymers, adding various conductive fillers such as carbon black (CB), carbon nanotubes (CNTs), graphene, metal ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is mainly aimed at the problem that the conductive polymer composite material prepared by the traditional injection molding technology has a relatively high percolation value and the production efficiency of the conductive polymer composite material prepared by the traditional hot pressing molding technology is extremely low, and proposes a method for preparing A new method with low permeation value, high molding efficiency, good processability and based on general polymer materials

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