取向碳纳米管/环氧树脂复合薄膜制备及结构与性能表征

碳纳米管(Carbon nanotube, CNT)/环氧树脂(Epoxy resin, EP)纳米复合材料中树脂含量、分布、CNT取向及其与树脂间界面结合是制备高性能纳米复合材料的关键因素。为了探究树脂分布和CNT/EP复合材料性能之间的关系，采用浮动催化化学气相沉积法制备的CNT薄膜和EP为原料，通过浸渍、牵伸、清洗和热压固化工艺制备CNT/EP复合薄膜。利用聚焦离子束结合扫描电子显微镜定性表征树脂在复合膜中的分布状态。结果表明，随着树脂含量增加，树脂在复合薄膜表面富集程度增加。在最优工艺条件下制备的纳米复合材料中CNT含量为66.14wt%, 拉伸强度和拉伸模量达到1405 MPa和46.7 GPa。 

Preparation and characterization of aligned carbon nanotubes/epoxy composite films

In carbon nanotube (CNT)/epoxy resin (EP) nanocomposites, the resin content and distribution, CNT orientation and CNT-resin interfacial strength are the key factors to fibrate the high-performance composites. In order to study the relationship between the resin distribution and the CNT/EP composite properties, CNT films prepared by floating catalytic chemical vapor deposition were impregnated by using EP and then stretched, washed and hot-press cured. The focus ion beam and scanning electron microscope were used to characterize the distribution of resin in the CNT/EP composites. The results show that, with the increase of resin content, the amount of resin on the composite surface is increasing and the average tensile strength and tensile modulus of CNT/EP composite with CNT content of 66.14wt% can be up to 1405 MPa and 46.7 GPa, respectively.