Three-dimensional high-thermal-conductivity polymer-based composite material and preparation method thereof

Abstract

The invention discloses a three-dimensional high-thermal-conductivity polymer-based composite material and a preparation method thereof. According to the first aspect of the application of the polymer-based composite material, the polymer-based composite material comprises a three-dimensional woven body formed by composite fibers, the composite fibers are prepared from a one-dimensional carbon material and a polymer matrixes, the polymer matrix is oriented in the length direction of the one-dimensional carbon material, and the composite fibers are subjected to slurry hanging treatment with heat-conducting slurry before forming the three-dimensional woven body. The three-dimensional high-thermal-conductivity polymer-based composite material at least has the following beneficial effects that an organic molecular chain of the polymer matrix and the one-dimensional carbon material are subjected to synergistic orientation, so that the composite fiber shows ultrahigh heat conduction performance in a single dimension, and meanwhile, the composite fibers are subjected to slurry hanging treatment by using heat conduction slurry, so that the synergistic effect improves the thermal conductivity of the composite fibers. On the basis, the composite material is subjected to three-dimensional weaving to obtain a three-dimensional woven body, so that the whole composite material shows obvious high heat-conducting property in the three-dimensional direction.

Description

technical field [0001] The present application relates to the technical field of thermal interface materials, in particular to a three-dimensional high thermal conductivity polymer-based composite material and a preparation method thereof. Background technique [0002] The heat flux of modern high-power devices shows a geometric progression, and thermal management has become a common key technology in the fields and equipment of microelectronics, communications, and new energy vehicles. Among them, efficient thermal interface materials are one of the main technical bottlenecks. Studies have shown that the reliability and service life of the device mainly depend on the operating temperature. A small increase in temperature will lead to a rapid decline in device performance and life. Therefore, ensuring that the heat of the device can be quickly transferred out is the key to ensuring the stable operation of the device. Common thermal interface materials include polymers, metal...

AI Technical Summary

Problems solved by technology

Carbon materials with ultra-high thermal conductivity have attracted extensive attention and research on carbon polymer-based thermal conductive composite materials at home and abroad, but the thermal conductivity of carbon polymer-based thermal interface materials obtained by homogeneous mixing is very low.

In addition, the thermal conductivity of carbon materials is anisotropic. In the case of high power or limited space, the thermal conductivity in the XY direction is weak, which affects the overall thermal conductivity of the composite material.

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