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Interfacial performance enhancement of carbon fiber/epoxy composites by a two-step surface treatment
Journal of Mechanical Science and Technology ( IF 1.6 ) Pub Date : 2021-01-15 , DOI: 10.1007/s12206-020-1208-y
Jian Shi , Yuji Yamamoto , Mamoru Mizuno , Chunhong Zhu

Carbon fiber-reinforced polymer composites (CFRPs) have many features, such as lightweight, high specific strength, and excellent chemical resistance. However, the adhesion at the interface of the CFRPs, which are composed of fiber and resin, is poor. Thus, de-lamination and interfacial peeling occur, and the mechanical properties, such as intrinsic strength and rigidity, decrease. Fiber surface modification by plasma and silane coupling treatments has attracted much attention to improve these properties. In this study, argon and oxygen mixed gas plasma treatment was used as pretreatment to introduce hydroxyl group on the fiber surface. This method was utilized to improve the adhesion between the fiber and resin. A silane coupling treatment was conducted to bond the carbon fiber and epoxy resin by chemical covalent bonding. The effect of silane coupling treatment on the interfacial property of CFRPs was investigated. Elemental analysis of the surface modified carbon fiber was explored through energy dispersive X-ray spectrometry. The functional groups of different carbon fiber surfaces were analyzed through X-ray photoelectron spectroscopy. The wettability of the treated carbon fiber was examined with a contact angle meter. The interlaminar shear strength was determined with a short beam method.



中文翻译:

通过两步表面处理提高碳纤维/环氧树脂复合材料的界面性能

碳纤维增强聚合物复合材料(CFRP)具有许多功能,例如重量轻,比强度高和出色的耐化学性。但是,由纤维和树脂组成的CFRP界面处的粘合性很差。因此,发生分层和界面剥离,并且机械性能例如固有强度和刚度降低。通过等离子体和硅烷偶联处理对纤维表面进行改性已引起人们对改善这些性能的关注。在这项研究中,氩气和氧气的混合气体等离子体处理被用作在纤维表面引入羟基的预处理。该方法用于改善纤维与树脂之间的粘合力。进行硅烷偶联处理以通过化学共价键合来键合碳纤维和环氧树脂。研究了硅烷偶联处理对CFRPs界面性能的影响。通过能量色散X射线光谱研究了表面改性碳纤维的元素分析。通过X射线光电子能谱分析了不同碳纤维表面的官能团。用接触角计检查处理过的碳纤维的润湿性。层间剪切强度通过短梁法测定。用接触角计检查处理过的碳纤维的润湿性。层间剪切强度通过短梁法测定。用接触角计检查处理过的碳纤维的润湿性。层间剪切强度通过短梁法测定。

更新日期:2021-01-15
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