Carbon/carbon composite material and preparation method and application thereof: Fid-Bau Portal

Carbon/carbon composite material and preparation method and application thereof

CHEN YOUSI / JIAN XIGAO / YANG MINGHANG / LIU CHENG / ZHANG SHOUHAI / PAN YUXI

The invention provides a carbon/carbon composite material and a preparation method and application thereof, and belongs to the technical field of composite materials. The preparation method comprises the following steps: preparing a carbon/carbon composite material precursor by taking polyolefin as matrix resin and cyclized organic fiber as a reinforcement, and carrying out chemical crosslinking treatment, optional first pyrolysis treatment, carburizing treatment and/or siliconizing treatment, second pyrolysis treatment and optional densification treatment on the carbon/carbon composite material precursor to obtain the carbon/carbon composite material. Preparing a carbon/carbon composite material; wherein the polyolefin and the cyclized organic fiber can realize synchronous shrinkage in the pyrolysis process, so that the generation of crack defects in the carbon/carbon composite material can be effectively inhibited, and the improvement of the mechanical property of the carbon/carbon composite material is facilitated; meanwhile, polyolefin thermoplastic resin is adopted as matrix resin, and the problems that traditional matrix resin (such as phenolic resin) is long in curing period and complex in forming process are effectively solved. The invention also provides the carbon/carbon composite material which is prepared by the preparation method.

本发明提供了一种碳/碳复合材料及其制备方法和应用，属于复合材料技术领域。该制备方法采用聚烯烃作为基体树脂、环化有机纤维作为增强体制备碳/碳复合材料前驱体，通过对碳/碳复合材料前驱体进行化学交联处理、任选的第一次热解处理、渗碳处理和/或渗硅处理以及第二次热解处理和任选的致密化处理，制得碳/碳复合材料；其中，聚烯烃和环化有机纤维在热解过程中可实现同步收缩，能够有效抑制碳/碳复合材料中裂纹缺陷的产生，有利于碳/碳复合材料力学性能的提升；同时，采用聚烯烃热塑性树脂作为基体树脂，有效解决传统基体树脂(例如酚醛树脂)固化周期长、成型工艺复杂的问题。本发明还提供了一种碳/碳复合材料，采用上述制备方法制得。

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