碳纳米管对中间相沥青基泡沫炭热导率和力学性能的影响  

Effect of carbon nanotubes on thermal conductivity and mechanical performance of carbon foam derived from mesophase pitch

作　　者：吕婧[1] 李铁虎[1] 赵廷凯[1] 刘和光[1] 史亚春[1] 赵星[1] 

机构地区：[1]西北工业大学材料学院,陕西西安710072

出　　处：《功能材料》2013年第10期1461-1464,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51172184);西北工业大学研究生种子基金资助项目(Z2012024)

摘　　要：利用超声分散的方法,使改性后的碳纳米管(m-CNTs)在中间相沥青中均匀分散,通过自挥发发泡法制备出不同m-CNTs含量的中间相沥青基泡沫炭。用TEM、SEM等分析方法研究了不同m-CNTs的添加量对泡沫炭结构和性能的影响。实验结果表明,与CNTs相比,m-CNTs的分散性有所提高;添加一定量的m-CNTs后,泡沫炭的平均泡孔尺寸有所减小,并且微裂纹数减少;当m-CNTs的添加量达到5%(质量分数)时,泡沫炭的热导率和压缩强度均达到最大,分别为137W/(m.K)和12.1MPa。Modified carbon nanotubes（m-CNTs） were dispersed uniformly in the mesophase pitch by ultrasonic dispersion. Then carbon foam was prepared through self volatile foaming, carbonization and graphitization using m-CNTs/mesophase pitch compound asa precursor. TEM, SEM analysis methods were employed to investigate the amount of additional m-CNTs on the structure and properties of the carbon foam. The results show that the dispersion of m-CNTs was improved when comparing with CNTs. The average size of carbon foam reduced to some degree when m-CNTs are added, furthermore the number of rnicro-cracks of the foam de creased significantly. When the proportion of the m-CNTs reaches 5wt%, thermal conductivity and compression strength of carbon foam achieve the highest, 137W/（m . K） and 12.1MPa, respectively.

关 键 词：泡沫炭 碳纳米管 热导率 力学性能 

分 类 号：TQ127[化学工程—无机化工]