碳纳米管（CNT）是具有一维管状结构的碳纳米材料，具有优异的导热性能、电学性能及良好的力学性能，常作为理想填料用于制备功能高分子复合材料。以含酯交换反应的动态交联体系环氧树脂为基体，成功制备了具有自修复功能的CNT/环氧树脂复合材料。通过对碳管表面进行酸化处理接枝羧基等官能团改善其分散性。对制备的复合材料的表面形貌、力学性能和自修复性能等进行了测试，结果表明，酸化碳管在环氧树脂基体中分布均匀；酸化碳管质量分数为0.5%的复合材料断裂强度提升了51.5%，模量增加了130.2%，对其进行修复后力学强度恢复率达到了96%。

Carbon nanotube (CNT) is a carbon nanomaterial with one-dimensional tubular structure.Due to its superior thermal conductivity,excellent electrical property and good mechanical property,CNT is often used as an ideal filler for functional polymer composites.CNT/epoxy composites with self-repairing function are successfully prepared based on the dynamic cross-linking system epoxy resin containing transesterification reaction.The dispersibility of CNT is improved by grafting functional groups such as carboxyl groups through acidification treatment of CNT surface.The surface morphology,mechanical properties and self-repairing properties of the composites are tested.It is found that the acidified CNTs distribute evenly in the epoxy resin matrix;The tensile strength and modulus of composites with 0.5 wt% of acidified CNT is improved by 51.5% and 130.2% respectively;The composites' mechanical strength rate recovers by 96% after being repaired,indicating that the composites has excellent self-healing properties.

刘妙琪(1995-),女,硕士研究生,研究方向为聚合物纳米复合材料,fmb7187@163.com