纳米碳纤维复合材料的阻温特性研究  

Research on resistivity-temperature effect of carbon nanofibers composite

作　　者：梅启林[1] 王继辉[1] 王福玲[1] 黄志雄[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070

出　　处：《华中科技大学学报（自然科学版）》2008年第11期83-86,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：湖北省自然科学基金资助项目(2005ABA010)

摘　　要：采用超声波分散的方法制备了纳米碳纤维/环氧树脂复合材料,研究了纳米碳纤维含量对复合材料导电性能的影响,并对其伏安特性及阻温特性进行了探讨.研究结果表明：复合材料的电阻率随纳米碳纤维质量分数的增加呈几何级数递减,其渗滤区域在0.1%～0.2%之间;其电流-电压关系基本符合欧姆定律;复合材料在升温和降温过程中均呈现出正温度效应和负温度效应,并具有较好的回复稳定性.By the means of ultrasonic dispersion, carbon nanofibers reinforced epoxy resin composite was prepared in the lab, the conductivity of composite with different content of carbon nanofibers was studied, also the voltage-current relationship and resistivity-temperature properties were discussed. It showed that the resistivity of composite decreased in geometric progression with the increasing of carbon nanofibers, and the threshold ranged between 0. 1% and 0.2%. The voltage-current relationship was in good conformity with the Ohm＇s law, both positive temperature coefficient and negative temperature coefficient could be found at elevated temperature or lowering the temperature, and good reversibility was shown.

关 键 词：聚合物 复合材料 纳米碳纤维 电阻率 正温度效应 负温度效应 

分 类 号：TB332[一般工业技术—材料科学与工程]