Conductive polymer composite and preparation method thereof

Abstract

The invention provides a conductive polymer composite and a preparation method thereof. The conductive polymer composite comprises 100 parts by weight of matrix and 0.01-1.5 parts by weight of conductive nanofiller, wherein the matrix is an incompatible polymer blend system with dual-continuous structure, and the length-diameter ratio of the conductive nanofiller is greater than or equal to 100. Compared with a conductive fibering polymer composite prepared from carbon black, polyethylene and polyethylene terephthalate in the prior art, the conductive polymer composite has the advantages that firstly, the length-diameter ratio of the conductive nanofiller adopted in the conductive polymer composite is larger, so that the insulated polymer can conduct electricity by few addition of the conductive nanofiller, thus the conductive percolation threshold of the conductive polymer composite is reduced; secondly, the matrix of the dual-continuous structure and the conductive polymer nanofiller are distributed on a two-phase interface of the incompatible polymer blend system with the dual-continuous structure, so that the conductive percolation threshold of the conductive polymer composite is reduced; and finally, the preparation method provided by the invention is simple, safe and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a conductive polymer composite material and a preparation method thereof. Background technique [0002] Conductive polymer composite materials are based on structural polymer materials (continuous phase), and various conductive substances (such as carbon systems, metals, metal oxides, structural conductive polymers, etc.), through dispersion compounding, layering Materials with electrical conductivity formed by compounding, surface compounding or gradient compounding. Since the 1980s, conductive polymer composite materials have gradually become a hot research direction in the field of polymer science, and they are also widely used in antistatic materials, electromagnetic wave shielding materials, wave absorbing materials, temperature and current control materials, sensors, etc. , energy materials and other fields. [0003] In conductive polymer composites,...

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Problems solved by technology

[0006] The Chinese patent with the publication number CN 102061028A discloses a method for preparing a conductive polymer composite material with low percolation value. In this method, carbon black (CB) is mixed with polyethylene (PE), and then the CB / PE mixture is mixed with polyethylene (PE). Ethylene terephthalate (PET) is processed by extrusion, thermal stretching, quenching and other technologies, and finally granulated and molded to obtain a conductive fibrous polymer composite material, and its conductive percolation threshold is reduced to 3.8vol %, but more CB is required, resulting in a decrease in the mechanical properties of the material, higher costs, and more complex processing techniques

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