氧化石墨烯的尺寸对碳纤维/环氧树脂湿热界面性能的影响  

Influence of size of graphene oxide on interfacial properties of carbon fiber/epoxy resin under damp and heat conditions

作　　者：任明伟 自雅娴 张莹 周玉敬 邱虹[3] 刘刚 白华[3] 胡晓兰[3] Mingwei REN;Yaxian ZI;Ying ZHANG;Yujing ZHOU;Hong QIU;Gang LIU;Hua BAI;Xiaolan HU(State Key Laboratory of Advanced Forming Technology and Equipment,Beijing National Innovation Institute of Lightweight Co.,Ltd.,Beijing 100083,China;Dezhou Branch of Beijing National Innovation Institute of Lightweight Co.,Ltd.,Dezhou 253049,Shandong,China;College of Materials,Xiamen University,Xiamen 361000,Fujian,China;Center for Advanced Low-dimension Materials,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]北京机科国创轻量化科学研究院有限公司先进成形技术与装备国家重点实验室,北京100083 [2]北京机科国创轻量化科学研究院有限公司德州分公司,山东德州253049 [3]厦门大学材料学院,福建厦门361000 [4]东华大学材料科学与工程学院纤维材料改性国家重点实验室先进低维材料中心,上海201620

出　　处：《材料工程》2023年第9期208-216,共9页Journal of Materials Engineering

基　　金：国家自然科学基金项目(21774104,21975210);先进成形技术与装备国家重点实验室开放基金(SKL2020002);海南省重点研发计划(ZDYF2020011);山东省自然科学基金项目(ZR2020ME068)。

摘　　要：通过Hummers法获得两种尺寸的氧化石墨烯(GO),利用模压成型制备GO改性碳纤维增强环氧树脂复合材料(GO/CF/EP),并对复合材料进行湿热处理,利用层间剪切性能、动态热机械性能和微观形貌分析室温干态和湿热处理后复合材料的改性效果。结果表明:GO对复合材料的层间剪切强度和玻璃化转变温度均具有良好的改善作用;室温干态时两种尺寸GO对复合材料层间剪切强度的改善效果基本相同;随GO含量增加,小尺寸GO使复合材料的湿热层间剪切强度下降更快,GO含量为0.1%(质量分数,下同)时对复合材料的层间剪切性能改善作用较好,而GO含量为0.2%时对复合材料的玻璃化转变温度改善更好。随GO含量增加,GO-EP复合树脂基体的放热峰向低温移动,小尺寸GO使复合树脂的凝胶时间变短。微观形貌分析表明,GO的存在有利于增加复合材料破坏时的裂纹扩散路径,从而更有助于材料耗散裂纹尖端能量。Two different sizes of graphene oxide(GO)produced by the Hummers method had been incorporated into epoxy resins and used to fabricate GO modified carbon fiber reinforced epoxy resin composites(GO/CF/EP)by compression molding method,and the composite material was processed under damp and heat conditions.The modification effects of dry and wet composite materials were investigated through interlayer shear performance,dynamic thermomechanical properties and microscopic morphology.The results indicate that GO has a good improvement on the interlaminar shear strength and glass transition temperature of composite materials.In the dry state at room temperature,two sizes of GO have basically the same improvement effect on the interlaminar shear strength of the composite.With the increase of GO content,the small size of GO makes the hygrothermal interlaminar shear strength of composites decrease faster.When the GO content is 0.1%(mass fraction,the same as below),the improvement of the interlaminar shear performance of the composite material is better,however,the glass transition temperature of the composite material is better when the GO content is 0.2%.With the increase of GO content,the exothermic peak of the GO-EP composite resin matrix shifts to low temperature,and the small size of GO shortens the gel time of the composite resin.The micro-morphology analysis shows the presence of GO is beneficial for increasing the crack propagation path during the failure of composite material,thereby more conducive to the dissipate the crack tip energy by the material.

关 键 词：氧化石墨烯 碳纤维 环氧树脂 界面性能 

分 类 号：TB332[一般工业技术—材料科学与工程]