Anisotropic conductive and thermally conductive polymer composite material and preparation method thereof

Abstract

The invention belongs to the field of polymer materials, and relates to an anisotropic conductive and thermally conductive polymer composite material and a preparation method thereof. The invention provides an electrically and thermally conductive polymer composite material, the composite material is prepared by a polymer matrix and two-dimensional electrically and thermally conductive fillers through a multi-melt multiple injection molding method; wherein, the two-dimensional electrically and thermally conductive fillers are uniformly dispersed in the polymer matrix Among them, the two-dimensional conductive and thermally conductive filler is parallel to the plane formed by the injection flow direction and the transverse direction in the composite material, and has a multi-layer planar orientation structure along the normal phase direction; the transverse direction is perpendicular to the injection flow direction line, and the normal phase The direction is perpendicular to the plane formed by the injection flow direction and the transverse direction. The composite material obtained by the invention has both anisotropic electrical conductivity and anisotropic thermal conductivity, and its preparation method is simple and easy, and can be continuously mass-produced.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to an anisotropic two-dimensional conductive and thermally conductive functionalized polymer composite material and a preparation method thereof. Background technique [0002] With the rapid development of information technology, more and more attention has been paid to the heat dissipation of electronic devices with front-end Moore's Law. Therefore, the demand for functional materials with unidirectional conductivity and heat dissipation performance in the field of electronic technology is becoming increasingly strong. Polymer composites added with conductive and thermally conductive fillers (such as carbon black, carbon nanotubes, etc.) are increasingly used in the electrical conduction and Heat dissipation problem solved. In order to meet the unidirectional conduction and heat dissipation requirements of electronic devices, the research on the preparation of polymer-ba...

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Problems solved by technology

[0004] Although the above method solves the problem of preparing functionalized anisotropic polymer composites by injection molding, the design of the microstructure of the material is relatively complicated, requiring multiple steps of structural design, and the formation of the multilayer structure of the composite strongly depends on the resin material. The choice, and must rely on extremely harsh processing conditions such as ultra-high injection speed (high energy consumption) to be able to achieve

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