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High-thermal-conductivity carbon skeleton resin-based composite material and preparation method thereof
The invention discloses a high-thermal-conductivity carbon skeleton resin-based composite material and a preparation method thereof, and belongs to the technical field of thermal conductive composite materials. The preparation method comprises the following steps: firstly, preparing a fibrofelt preform from chopped mesophase pitch-based carbon fibers, and growing carbon nanotubes on the carbon fibers in situ by adopting a chemical vapor deposition process; depositing a layer of pyrolytic carbon through a chemical vapor infiltration process, and jointly connecting the carbon nanotubes/pyrolytic carbon with the chopped carbon fibers in the preform to prepare a porous hybrid network structure; carrying out graphitization treatment on the network structure to obtain a high-thermal-conductivity hybrid carbon skeleton composed of carbon fibers, carbon nanotubes and pyrolytic carbon; and impregnating polymer resin into the hybrid carbon skeleton structure through an impregnation process, and curing to obtain the carbon skeleton resin-based composite material. According to the prepared carbon skeleton resin-based composite material, when the volume fraction of the carbon skeleton accounts for 19.2 vol%, the thermal conductivity in the thickness direction of the composite material reaches 20.9 W/m.K which is 99 times of the thermal conductivity of pure epoxy resin, and the carbon skeleton resin-based composite material can be used as a novel thermal management material.
本发明公开了一种高导热的碳骨架树脂基复合材料及其制备方法，属于导热复合材料技术领域。首先用短切中间相沥青基碳纤维制成纤维毡预制体，采用化学气相沉积工艺在碳纤维上原位生长碳纳米管；再通过化学气相渗透工艺沉积一层热解碳，利用碳纳米管/热解碳共同连接预制体中的短切碳纤维，制得多孔杂化网络结构；对该网络结构进行石墨化处理，得到由碳纤维、碳纳米管、热解碳共同构成的高导热杂化碳骨架；通过浸渍工艺将聚合物树脂浸渍到杂化碳骨架结构中，固化后得到碳骨架树脂基复合材料。本发明制备的碳骨架树脂基复合材料，碳骨架体积分数占19.2 vol%时，沿复合材料厚度方向上的热导率达到20.9 W/m·K，是纯环氧树脂热导率的99倍，可用作新型热管理材料。
High-thermal-conductivity carbon skeleton resin-based composite material and preparation method thereof
The invention discloses a high-thermal-conductivity carbon skeleton resin-based composite material and a preparation method thereof, and belongs to the technical field of thermal conductive composite materials. The preparation method comprises the following steps: firstly, preparing a fibrofelt preform from chopped mesophase pitch-based carbon fibers, and growing carbon nanotubes on the carbon fibers in situ by adopting a chemical vapor deposition process; depositing a layer of pyrolytic carbon through a chemical vapor infiltration process, and jointly connecting the carbon nanotubes/pyrolytic carbon with the chopped carbon fibers in the preform to prepare a porous hybrid network structure; carrying out graphitization treatment on the network structure to obtain a high-thermal-conductivity hybrid carbon skeleton composed of carbon fibers, carbon nanotubes and pyrolytic carbon; and impregnating polymer resin into the hybrid carbon skeleton structure through an impregnation process, and curing to obtain the carbon skeleton resin-based composite material. According to the prepared carbon skeleton resin-based composite material, when the volume fraction of the carbon skeleton accounts for 19.2 vol%, the thermal conductivity in the thickness direction of the composite material reaches 20.9 W/m.K which is 99 times of the thermal conductivity of pure epoxy resin, and the carbon skeleton resin-based composite material can be used as a novel thermal management material.
本发明公开了一种高导热的碳骨架树脂基复合材料及其制备方法，属于导热复合材料技术领域。首先用短切中间相沥青基碳纤维制成纤维毡预制体，采用化学气相沉积工艺在碳纤维上原位生长碳纳米管；再通过化学气相渗透工艺沉积一层热解碳，利用碳纳米管/热解碳共同连接预制体中的短切碳纤维，制得多孔杂化网络结构；对该网络结构进行石墨化处理，得到由碳纤维、碳纳米管、热解碳共同构成的高导热杂化碳骨架；通过浸渍工艺将聚合物树脂浸渍到杂化碳骨架结构中，固化后得到碳骨架树脂基复合材料。本发明制备的碳骨架树脂基复合材料，碳骨架体积分数占19.2 vol%时，沿复合材料厚度方向上的热导率达到20.9 W/m·K，是纯环氧树脂热导率的99倍，可用作新型热管理材料。
High-thermal-conductivity carbon skeleton resin-based composite material and preparation method thereof
一种高导热碳骨架树脂基复合材料及其制备方法
HOU XIANGHUI (author) / WANG ZHONGKAI (author) / YANG DEYU (author) / SONG QIANG (author) / ZHANG SHOUYANG (author) / LI HEJUN (author)
2025-01-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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