摘要
采用化学接枝的方法对篮球鞋用碳纤维进行了表面改性处理,将柠檬酸接枝到碳纤维表面制备了碳纤维/环氧树脂复合材料,对比分析了改性前后碳纤维的表面形貌、界面剪切强度和层间剪切强度,并对断口形貌进行了观察。结果表明:经过柠檬酸改性后的碳纤维表面粗糙度明显增加,与树脂基体的结合力最强;碳纤维、氧化后的碳纤维、对苯二胺接枝的碳纤维、聚柠檬酸接枝的碳纤维和二次接枝对苯二胺的碳纤维的界面剪切强度分别为46.8,53.4,68.2,62.4,82.2 MPa,改性碳纤维的界面剪切强度都高于原始碳纤维,二次接枝对苯二胺的碳纤维的界面剪切强度最大;经过表面改性处理的碳纤维的层间剪切强度都有不同程度提高,且二次接枝对苯二胺的碳纤维的层间剪切强度最大。
Carbon fibers(CF)used for basketball shoes were modified by chemical grafting.During the process CF/epoxy resin composites were prepared by grafting citric acid onto CF.The surface morphology,interfacial shear strength and interlaminar shear strength of CF were compared before and after modification.The fracture morphology was observed as well.The results show that the surface roughness of CF modified by citric acid is improved significantly,and the bonding strength with resin matrix is the strongest.The interfacial shear strength of CF,oxidized CF,ursol grafted CF,poly(citric acid)grated CF and phenylene diamine secondary grated CF are 46.8,53.4,68.2,62.4,82.2 MPa respectively.The interfacial shear strength of the modified CF are higher than that of the unmodified carbon fibers,among which the value of phenylene diamine secondary grated CF is the largest.The interlaminar shear strength of carbon fibers are improved in varying degrees after surface modification,among which the value of phenylene diamine secondary grated CF is the largest.
作者
冯俊
Feng Jun(Northwest University of Political Science and Law,Xi’an 710122,China)
出处
《合成树脂及塑料》
CAS
北大核心
2019年第6期27-30,35,共5页
China Synthetic Resin and Plastics
关键词
碳纤维
复合材料
环氧树脂
柠檬酸
界面性能
化学接枝法
carbon fiber
composite material
epoxy resin
citric acid
interfacial property
chemical grafting method
