分别采用碳纳米管(CNTs)和石墨烯对聚酰亚胺树脂进行增强,制备了碳纤维增强复合材料。测试复合材料在不同温度下拉伸、弯曲、层剪等力学性能,通过SEM和TEM对材料微观结构进行表征。结果表明,增强后复合材料的力学性能在室温和高温条件下均有所提高。相比300℃时未改性的复合材料,填充CNTs复合材料的拉伸模量和填充石墨烯复合材料的弯曲强度均有所提升。 Carbon nanotubes (CNTs) and graphene were respectively used to reinforce the polyimide resin to prepare carbon fiber reinforced composites. The mechanical properties such as tensile, bending and shearing of the composites were tested at different temperatures. The microstructures of the composites were characterized by SEM and TEM. The results show that the mechanical properties of the reinforced composites increase at room temperature and high temperature. Compared with unmodified composites at 300 ℃, the tensile modulus of CNTs filled composites and the flexural strength of filled graphene composites increased.