大直径沥青基炭纤维/ABS树脂高导热复合材料的制备与表征  

Preparation and characterization of large diameter pitch based carbon fiber/ABS resin composites with high thermal conductivities

作　　者：易静[1] 袁观明[1] 李轩科[1] 杜鸿达[2] 董志军[1] 李保六[1] 林剑峰[1] 

机构地区：[1]武汉科技大学化学工程与技术学院,湖北武汉430081 [2]清华大学深圳研究生院,广东深圳518055

出　　处：《新型炭材料》2015年第1期63-70,共8页New Carbon Materials

基　　金：国家自然科学基金(91016003;51372177);湖北省教育厅科学研究计划(Q20141104)~~

摘　　要：将大直径中间相沥青基石墨化纤维定向排列后与ABS(丙烯腈-苯乙烯-丁二烯共聚物)树脂通过热压成型,制备出单向炭纤维ABS树脂基复合材料。借助X射线衍射、扫描电子显微镜和偏光显微镜等手段对炭纤维及其树脂基复合材料的晶体结构、形貌和光学织构进行表征,并研究纤维石墨化温度及体积分数对其复合材料导热性能的影响。结果表明,复合材料沿炭纤维轴向和径向显示出差异;复合材料沿纤维轴向的室温热扩散系数随纤维石墨化温度和体积分数的增加而增大。Parallel,stretched and evenly arranged mesophase pitch based graphitized carbon fibers with diameters of 50-53 μm were coated with different amounts of acrylonitrile butadiene styrene（ABS） resin,and hot-pressed to produce carbon fiber/ABS resin composites.The morphology,optical texture and crystal structure of the carbon fibers and their composites were characterized by scanning electron microscopy,polarized light microscopy and X-ray diffraction.The influence of the graphitization temperature and fiber content on the thermal conductivity of the composites was investigated.The thermal diffusivity and thermal conductivity of the composites along both fiber axial and radial directions showed an obvious difference,owing to the high orientation of the graphite crystals along the axial direction of the carbon fibers.The thermal diffusivity of the composites along the carbon fiber axial direction increased both with the graphitization temperature and fiber content.The composite with 54 vol.%carbon fibers graphitized at2 900 ℃ showed the highest thermal conductivity.

关 键 词：中间相沥青基炭纤维 ABS树脂 热导率 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]