热处理对EP/CF及EP/CF/GF复合材料力学性能的影响  

Effect of Heat Treatment on Mechanical Properties of EP/CF and EP/CF/GF

作　　者：方梅 谈昆伦 谈源 许经纬 黄明[2] 张娜 FANG Mei;TAN Kunlun;TAN Yuan;XU Jingwei;HUANG Ming;ZHANG Na(Jiangsu Key Laboratory of High Performance Fiber Composites,Changzhou 213000,China;National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450001,China;Changzhou Dames Testing Technology Co,Ltd,Changzhou 213000,China)

机构地区：[1]江苏省高性能纤维复合材料重点实验室,常州213000 [2]郑州大学橡塑模具国家工程研究中心,郑州450001 [3]常州达姆斯检测技术有限公司,常州213000

出　　处：《中国塑料》2021年第9期21-26,共6页China Plastics

基　　金：宁波市重大专项(2019B10117);广西重点研发计划(桂科AB19259014)。

摘　　要：采用真空辅助树脂转移模塑(VARTM)技术制备了环氧树脂/碳纤维(EP/CF)和环氧树脂/碳纤维/玻璃纤维毡(EP/CF/GF)复合材料。测试了两种纤维铺层方式中树脂流动距离的平方与流动时间的关系,对两种铺层纤维体系的渗透率进行了研究对比;将两种复合材料进行高温处理,并且对其高温处理前后的力学性能进行分析;利用扫描电子显微镜(SEM)观察了复合材料的拉伸断口形貌。结果表明,EP/CF/GF中GF毡的松散结构使树脂更易流动;高温热处理造成了EP/CF弹性模量和拉伸应变的降低,其中弹性模量降低了9.97%、拉伸应变降低了11.36%,但对EP/CF/GF的影响较小;GF毡的加入造成了2种复合材料弯曲性能的下降;未经处理的复合材料断口表面光滑,而热处理后的复合材料断口表面粗糙且有大量基体附着。The development of high⁃performance fiber⁃reinforced composite materials to replace traditional metal materials is considered as one of the most effective ways to realize the lightweight of automobiles.However,the application safety of automobile has risen an emerging for the high⁃temperature resistance of composite materials.This work focuses on the influence of high temperature treatment on the mechanical properties of composite materials.Epoxy resin(EP)/carbon fi⁃ber(CF)and EP/CF/glass mat(GF)composites were prepared through vacuum assisted resin transfer molding(VAR⁃TM).The relationship between the square of resin flow distance and the flow time in the two fiber layup modes was ex⁃plored,and the permeability of the two fiber layup systems was investigated comparatively.Two types of composites were treated at high temperatures and their mechanical properties before and after the high temperature treatment were an⁃alyzed.The tensile fracture morphology of the composites was observed by scanning electron microscopy.The results in⁃dicated that the loose structure of GF felt in the EP/CF/GF composites made the resin flow more easily.The Young's modulus and tensile strain of EP/CF composites decreased by 9.97%and 11.36%,respectively.However,the effect of heat treatment on the EP/CF/GF composites was insignificant.The addition of GF felt resulted in a decrease in the flexure properties of the two composites.The fracture surface of the composites without heat treatment was smooth.However,after heat treatment,the fracture surface became rough with significant deformation of the matrix.

关 键 词：真空辅助树脂转移模塑 碳纤维 玻璃纤维毡 复合材料 力学性能 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]