(1. 清华大学 机械工程系，北京 100084；2. 清华大学 先进成形制造教育部重点实验室，北京 100084)
摘 要: 通过对CNTs/EP(CNTs为碳纳米管，EP为E54环氧树脂)二元体系进行差热(DSC)及恒温流变性能的分析，以及对以表面原位生长CNTs的碳纤维织物(CFF)为增强相、环氧树脂为基体复合材料(CNTs/CFF/EP)的密度、力学性能的分析，获得采用热压法制备含碳纳米管的CNTs/CFF/EP三元层状复合材料的合理工艺参数，并研究加压时间对复合材料性能的影响。结果表明：当预热温度为150 ℃、预热保温约60 min后加满压、热固化温度为195 ℃的条件下可制得表面无缺陷、致密度为97.3%~98%的CNTs/CFF/EP三元复合材料；原位生长CNTs的引入，可使复合材料的层间剪切强度提高52%、抗弯强度提高26%；加压时机的提前及延迟均会不同程度地降低复合材料的力学性能。
关键字: 层状复合材料；E54环氧树脂；原位生长碳纳米管；碳纤维织物；热分析
（1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;2. Key Laboratory for Advanced Materials processing Technology, Ministry of Education, Beijing 100084, China）
Abstract:The appropriate technological parameters for the preparation of in-situ growing CNTs/CFF/EP (CNTs is carbon nanotubes, EP is E54 epoxy resin) ternary laminar composites by the hot-pressed method were obtained by the analysis of DSC characteristic curves and isothermal rheological curves of CNTs/EP binary system, together with the analysis of density and mechanical properties of CNTs/CFF/EP composite with EP matrix laminar composites reinforced by carbon fiber fabric (CFFs) with in-situ growing CNTs. The effect of the pressure time on the properties of the composites was studied. The results show that when the CNTs/CFF/EP ternary laminar composite precursors are preheated at 150 ℃ for about 60 min, which is pressure time, and then heated at 195 ℃ with full load on, the composite can be well molded with smooth surface with no defects and high density (97.3%-98%); the introduction of in-situ growing CNTs can increase the interlaminar shear strength of the composites by 52%, as well as the bending strength by 26%; ahead or delay of pressure time can bring negative effects on properties of the composites to different extent.
Key words: laminar composite; E54 epoxy; in situ growing carbon nanotubes; carbon fiber fabric; thermal analysis
