碳纤维表面处理对液体成型碳纤维增强MC尼龙复合材料力学性能的影响  

Effect of carbon fiber surface treatment on the mechanical properties of liquid-formed carbon fiber reinforced MC nylon composite

作　　者：胡斌斌 王少飞 蔡超迁 黄壮 马禹[1] 张辉[1] HU Bin-bin;WANG Shao-fei;CAI Chao-qian;HUANG Zhuang;MA Yu;ZHANG Hui(State Key Laboratory of Fiber Material Modification,School of Materials Science and Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学材料科学与工程学院纤维材料改性国家重点实验室,上海201620

出　　处：《复合材料科学与工程》2021年第10期83-88,95,共7页Composites Science and Engineering

基　　金：上海市科委“科技创新行动计划”项目课题(18DZ1101003)。

摘　　要：本论文采用真空辅助树脂灌注成型工艺(VARI),通过己内酰胺原位阴离子聚合的方法制备了连续碳纤维增强浇铸(MC)尼龙的复合材料,并系统研究了丙酮去浆处理、气相氧化处理、偶联剂处理和火焰处理四种不同碳纤维织物表面处理方式的碳纤维表面的O/C比和微观形貌以及复合材料的力学性能、表面形貌和碳纤维体积分数。结果表明:对碳纤维表面进行偶联剂涂层处理,此碳纤维制备的复合材料的力学性能较其他处理方式的碳纤维制备的复合材料而言力学性能最优,其拉伸强度达到595.5 MPa,弯曲强度达到330.7 MPa,层间剪切强度达到30.6 MPa;此条件下碳纤维表面的O/C比达到44.51%,复合材料的碳纤维体积分数达到51.4%。In this paper, a vacuum-assisted resin infusion molding process(VARI) was used to prepare continuous carbon fiber reinforced cast(MC) nylon composites by in-situ anionic polymerization of caprolactam. The O/C ratio detailed surface morphologies within the carbon fiber surface as well as the carbon fiber mechanical properties, the surface morphologies and fiber volume fraction of the composite materials were systematically studied in four different carbon fiber fabric surface treatment methods, i.e., acetone desizing treatment, gas phase oxidation treatment, coupling agent treatment and flame treatment. The results indicate that the surface of the carbon fiber is coated with a coupling agent, and the mechanical properties of the composite material prepared by this carbon fiber are better than those prepared by other treatment methods. In this case, the tensile strength reaches 595.5 MPa. The flexural strength reaches 330.7 MPa, and the interlaminar shear strength reaches 30.6 MPa. The carbon fiber surface O/C ratio reaches 44.51%, and the carbon fiber volume fraction of the composite material reaches 51.4%.

关 键 词：MC尼龙 原位聚合 碳纤维表面处理 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]