基于原位生长CNTs/CFF/EP层状复合材料的成型工艺  

Forming process of in-situ growing CNTs/CFF/EP lamellar composites

作　　者：任冲[1,2] 王特[1,2] 巩前明[1,2] 梁吉[1,2] 

机构地区：[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

出　　处：《中国有色金属学报》2013年第5期1275-1281,共7页The Chinese Journal of Nonferrous Metals

基　　金：航空工业先进研究基金资助项目(2006273);中国博士点专项基金资助项目(20070003065);先进成形教育部重点实验室开放基金资助项目(2008010)

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。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 ~C for about 60 rain, 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.

关 键 词：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 

分 类 号：TB322[一般工业技术—材料科学与工程]