阳极氧化处理对PAN基碳纤维性能的影响  

Effect of anodic oxidation on properties of PAN-based carbon fiber

作　　者：钱鑫 王雪飞 张永刚 支建海 曹阿民[2] 

机构地区：[1]中国科学院宁波材料技术与工程研究所碳纤维制备技术国家工程实验室,浙江宁波315201 [2]中国科学院上海有机化学研究所,上海200032

出　　处：《合成纤维工业》2016年第1期1-5,共5页China Synthetic Fiber Industry

基　　金：国家自然科学基金项目(51503216);宁波市自然基金项目(2015A610015);国家重点基础研究发展计划资助项目(2011CB605602)

摘　　要：利用阳极氧化技术对聚丙烯腈(PAN)基碳纤维表面进行改性处理,研究了处理前后PAN基碳纤维表面润湿性能及力学性能的变化,分析了阳极氧化处理时电流强度对PAN基碳纤维及其增强环氧树脂基复合材料性能的影响。结果表明:阳极氧化处理后,PAN基碳纤维的润湿性提高,其中碳纤维与水、乙醇的接触角分别由处理前的64.6°,50.9°降至处理后的24.6°,28.1°,其表面能由未处理的37.4 m N/m提高到处理后的83.3 m N/m,经水洗干燥处理后,碳纤维润湿性及表面能有所降低;阳极氧化过程中,随着电流强度的提高,PAN基碳纤维的线密度及拉伸强度出现先升高后降低现象;阳极氧化处理后,碳纤维表面活性提高,碳纤维/环氧树脂基复合材料层间剪切强度较未处理时的最大增幅达到86%;阳极氧化处理PAN基碳纤维的最佳电流强度为14 A。The surface modification of polyacrylonitrile（PAN）-based carbon fiber was conducted by anodic oxidation technique. The change in the surface wettability and mechanical properties of the PAN-based carbon fiber were studied before and after anodic oxidation. The effect of current intensity on the properties of PAN-based carbon fiber and its reinforced epoxy resin composite material was analyzed. The results showed that the wettability of the PAN-based carbon fiber was improved, the contact angles with water and ethanol were decreased from 64.6° and 50.9°to 24.6° and 28.1°, respectively, and the surface energy was increased from 37.4 mN/m to 83.3 mN/m after anodic oxidation; the wettability and surface energy of carbon fiber were both decreased after washing and drying; the linear density and tensile strength of PAN-based carbon fiber were increased and then decreased with the increase of current intensity during anodic oxidation; the surface activity of the carbon fiber was increased and the interlaminar shear strength of the epoxy resin-based carbon fiber composite material was maximumly increased by 86% after anodic oxidation; and the rational current intensity was 14 A for anodic oxidation of PAN-based carbon fiber.

关 键 词：聚丙烯腈基碳纤维 阳极氧化 润湿性 复合材料 层间剪切强度 

分 类 号：TQ342.742[化学工程—化纤工业]