表面处理对连续碳纤维性能的影响
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摘要
采用高锰酸钾(KMnO_4)、浓硝酸(HNO_3)、电化学氧化和超声波-双氧水联合氧化法分别对连续碳纤维(CCF)进行了表面处理,研究了CCF的表面形貌、浸润性、浸渍性以及复丝拉伸强度等。通过扫描电子显微镜(SEM)、反气相色谱法(IGC)、拉伸实验机表征了处理前后CCF的表面结构、表面能、浸渍效果及力学性能。结果表明,KMnO_4、HNO_3、电化学氧化和超声波-双氧水联合氧化等这几种处理方式均能改善CCF的粗糙程度和润湿性能,其中超声波-双氧水联合处理后的CCF的综合性能最优。
Surfaces of continuous carbon fibers(CCF) were modified by KMnO_4, HNO_3,electrochemical oxidation and ultrasonic-hydrogen peroxide combined oxidation. Surface morphology, wettability,impregnation and multifilament tensile strength of CCF were investigated.Scanning electron microscopy,inverse gas chromatography,and electronic tensile test machine were adopted to examine the surface structure,surface energy,impregnation effect and mechanical properties of CCF before and after surface treatments.The results indicated that treatment methods used all improved the performance of CCF,but CCF achieved optimum comprehensive performance after ultrasonic-hydrogen peroxide treatment.
Surfaces of continuous carbon fibers(CCF) were modified by KMnO_4, HNO_3,electrochemical oxidation and ultrasonic-hydrogen peroxide combined oxidation. Surface morphology, wettability,impregnation and multifilament tensile strength of CCF were investigated.Scanning electron microscopy,inverse gas chromatography,and electronic tensile test machine were adopted to examine the surface structure,surface energy,impregnation effect and mechanical properties of CCF before and after surface treatments.The results indicated that treatment methods used all improved the performance of CCF,but CCF achieved optimum comprehensive performance after ultrasonic-hydrogen peroxide treatment.
引文
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[2]贺福,王茂章.碳纤维及其复合材料[M].北京:科学出版社,1997,150-168.
[3]A Kafi,M Huson,C Creighton,J Y Khoo.Effect of Surface Functionality of PAN-based Carbon Fibres on the Mechanical Performance of Carbon/Epoxy Composites[J].Composites Science and Technology,2014,94(4):89-95.
[4]杨洪斌,王靖,吴惠敏,等.硅溶胶改性处理对碳纤维/环氧树脂复合材料拉伸性能的影响[J].材料研究学报,2013,27(1):108.Yang Hongbin,Wang Jing,Wu Huimin,et al.Effect of Silica Sol Modification on the Tensile Property of Carbon Fiber/Epoxy Composites[J].Chinese Journal of Materials Research,2013,27(1):108.
[5]吴庆,陈惠芳.碳纤维的表面处理[J].化工新型材料,1999,28(3):11-14.Wu Qing,Chen Huifang.Surface Treatment of Carbon Fiber[J].New Chemical Materials,1999,28(3):11-14.
[6]Mathur R B,Bahl O P,Sandle N K.IR Studies of PAN Fibres Thermally Stabilized at Elevated Temperatures[J].Carbon,1994,32(6):1133-1136.
[7]孙浩,杨恩辉,张晓东,等.碳纤维表面处理工艺优化研究[J].化工科技,2016,24(2):47-49.Sun Hao,Yang Enhui,Zhang Xiaodong,et al.Study on Optimization of Surface Treatment of Carbon Fiber[J].Chemical Engineering and Technology,2016,24(2):47-49.
[8]代志双,石峰晖,张宝艳,等.碳纤维表面能测试方法的比较[C]//第十六届全国复合材料学术年会论文集.长沙:中国科学技术出版社,2010:291-297.