石墨烯改性碳纤维树脂基复合材料的制备和性能评价  

Preparation and performance evaluation of carbon fiber/epoxy composites modified with graphene prepregs

作　　者：陈宇 张代军 李军 温嘉轩 陈祥宝 CHEN Yu;ZHANG Dai-jun;LI Jun;WEN Jia-xuan;CHEN Xiang-bao(Soft Materials Technology Center,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;National Key Laboratory of Advanced Composites,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)

机构地区：[1]中国航发北京航空材料研究院软材料技术研究中心,北京100095 [2]中国航发北京航空材料研究院先进复合材料国防科技重点实验室,北京100095

出　　处：《材料工程》2020年第10期82-87,共6页Journal of Materials Engineering

基　　金：国家青年科学基金资助项目(51803200)。

摘　　要：以石墨烯预浸料作为功能层,铺贴在碳纤维预成型体表面,通过热压罐共固化成型的方法,制备石墨烯改性碳纤维树脂基复合材料。利用超声扫描、金相电镜、四探针、矢量网络分析仪和万能材料试验机等测试手段研究石墨烯预浸料对复合材料内部质量、电磁屏蔽性能和力学性能的影响。实验结果表明:石墨烯预浸料的加入,并不会影响到复合材料的内部质量,并且石墨烯功能层和碳纤维结构层之间具有良好的界面相容性。在此基础上,石墨烯预浸料作为功能层,利用其优异的导电性能,可以使得复合材料的电磁屏蔽性能显著提高。当加入G105/3234石墨烯预浸料时,复合材料的电磁屏蔽效能由27.7 dB提高到64.7 dB。与此同时,改性后的碳纤维树脂基复合材料仍然可以保持良好的力学性能。Graphene/carbon fiber/epoxy composites were prepared by autoclave co-curing molding process with graphene prepregs as the functional layer,which were paved on the surface of carbon fiber perform.The effect of graphene prepregs on the internal quality,electromagnetic interference shielding performance and mechanical properties of the composites was investigated by ultrasound scanner,metallograph,four-probe instrument,vector network analyzer and electronic universal material testing machine.The results show that the internal quality of the graphene/carbon fiber/epoxy composites will not be influenced by the addition of graphene prepregs,and there are a good interfacial compatibility between graphene functional layer and carbon fiber structural layer.On this basis,graphene prepregs,which serves as the functional layer,taking advantage of excellent electrical conductivity,can improve the electromagnetic interference shielding performance of the corresponding composites rapidly.With only one layer of graphene prepreg(G105/3234),electromagnetic interference shielding efficiency of carbon fiber/epoxy composites is improved from 27.7 dB to 64.7 dB.Meanwhile,the obtained composites still maintain satisfactory mechanical properties.

关 键 词：石墨烯预浸料 碳纤维 复合材料 电磁屏蔽性能 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]