气相生长碳纤维/中间相沥青碳碳复合材料制备及性能研究  

Study on the preparation and property of vapor grown carbon fiber/mesophase pitch composite

作　　者：韩瑞连[1] 刘秀军[1] 樊桢[2] 李同起[2] 魏强强[1] Han Ruilian Liu Xiujun Fan Zhen Li Tongqi Wei Qiangqiang(School of Environmental and Chemical Tianjin 300387 National Key Laboratory Aerospace Research Institute of Materials Engineering,Tianjin Polytechnic University, of Advanced Functional Composite Materials, and Processing Technology, Beijing 100076)

机构地区：[1]天津工业大学环境与化学工程学院,天津300387 [2]航天材料及工艺研究所先进功能复合材料技术国防科技重点实验室,北京100076

出　　处：《化工新型材料》2016年第10期49-51,共3页New Chemical Materials

基　　金：国家重点基础研究发展计划(973)项目课题(2011CB605802)

摘　　要：以中间相沥青(MP)为基体,气相生长碳纤维(VGCF)为增强体,通过低温热模压成型,炭化、石墨化制备了不同VGCF含量的VGCF/MP碳碳复合材料。对样品的形貌进行表征并对不同VGCF含量制得的碳碳复合材料的各项性能进行测试,探究材料微观结构与其抗弯强度、电阻率和导热系数之间的关系。结果表明:随着VGCF含量的增加,复合材料的导电性能和抗弯强度先增大后减小,当VGCF含量为50%(wt,质量分数)时,密度高达1.6g/cm3,弯曲模量达到12.0GPa,抗弯强度为77.5MPa,电阻率最低为0.59×10-5Ω·m,导热系数最大为113.87W/(m·℃)。C/C composites with different vapor grown carbon fiber contents were fabricated by mesophase pitch as matrix and vapor grown carbon fiber as the reinforcing materials,using low temperature-heat molding with carbonation and graphitization process. The morphology of samples were characterized, and then the various properties of C/C composites were tested. The relationship between the microstruetures and the bending strength,the resistivity and the thermal conduc- tivity was investigated. The results showed that： the flexural strength and resistivity of composites increased at first and then decreased with increase of the content of VGCF in the composites, and when the mass fraction of VFCF was up to 50%（wt） ,the properties were hest, with the largest density up to 1.6g/cma, the bending modulus tend to 12.0GPa, the bending strength 77.5 MPa, the lowest resistivity 0.59×10^-5Ω·m and the thermal conductivity up to 113.87W/（m·℃ ）.

关 键 词：气相生长碳纤维 碳碳复合材料 抗弯强度 电阻率 

分 类 号：TQ342.742[化学工程—化纤工业]