将不同体积分数的定向碳纳米管(A-MWNT)通过溶液共混的方法填充到天然橡胶中,经过室温交联硫化,得到A-MWNT填充的天然橡胶复合材料.对比普通非定向碳纳米管(MWNT),观察了A-MWNT在天然橡胶基体中的分散情况,研究了A-MWNT对橡胶复合材料玻璃化转变温度(Tg)、高温交联放热和导热性能的影响,并进行了机理分析.研究表明:A-MWNT在与天然橡胶溶液共混过程中经超声波振荡和搅拌后会被部分打乱.但是在微区单元内是定向的,在整体上呈非定向.随着A-MWNT填充量的增加,Tg逐渐下降后又有回升之势,高温交联固化放热逐渐增大,复合材料的导热率较之同条件下MWNT填充的复合材料的导热率大,且增长速度较快,在填充分数为10％时,导热率跃增到0.735 W/(m·K),增加了222.4％.
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