改性上浆剂对碳纤维增强树脂基复合材料力学性能的影响  

Effect of modified sizing agent on mechanical properties of carbon fiber reinforced epoxy resin matrix composites

作　　者：刘兴保 郭自豪 尹国强 郭聪聪 李志涛 白向鸽 LIU Xingbao;GUO Zihao;YIN Guoqiang;GUO Congcong;LI Zhitao;BAI Xiangge(Jiangsu Hengshen Co.,Ltd.,Danyang 212314)

机构地区：[1]江苏恒神股份有限公司,江苏丹阳212314

出　　处：《合成纤维工业》2024年第6期42-47,共6页China Synthetic Fiber Industry

摘　　要：以湿纺碳纤维及环氧树脂为原料,采用改性环氧类上浆剂对碳纤维进行表面处理,通过热熔法制备预浸料,再通过热压罐成型工艺制备碳纤维增强树脂基复合材料,分析了改性上浆剂的化学结构及热稳定性,研究了改性上浆剂对碳纤维的基本性能及丝束展纱性、纤维/树脂界面微观形貌及复合材料力学性能的影响。结果表明:改性上浆剂引入了活性基团,其热分解温度为284.3℃,比未改性上浆剂的热分解温度提高9.3℃,热稳定性提高;改性上浆剂上浆处理的碳纤维丝束的展纱率为70%,比未改性上浆剂上浆处理的碳纤维丝束的展纱率提升了7.7%,展纱性更好;改性上浆剂上浆处理的碳纤维的基本性能与未改性上浆剂上浆处理的碳纤维相当,仅拉伸强度略高;改性上浆剂制备的碳纤维增强树脂基复合材料的整体力学性能更优异,0°拉伸强度提升17.8%,复合材料拉伸断面规整,未见纤维拔出及纤维层与树脂层的明显剥离。A wet spun carbon fiber subjected to surface treatment with modified epoxy resin sizing agents was produced into prepregs by hot melt method,which were produced into carbon fiber reinforced resin matrix composites by hot press molding process.The chemical structure and thermal stability of the modified sizing agent were analyzed.And the effects of the modified sizing agent on the basic properties of carbon fiber,the splitting rates of the fiber bundle,the micro-morphology of the fiber/resin interface and the mechanical properties of the composite material were studied.The results showed that the modified sizing agent had a thermal decomposition temperature of 284.3℃with an elevation of 9.3℃,due to the introduction of active groups indicating that the thermal stability was improved as compared with that of the unmodified sizing agent;the carbon fiber bundles treated with the modified sizing agent showed the splitting rates of 70%and better splitting properties with an increase of 7.7%in the splitting rate;the carbon fibers treated with the unmodified and modified sizing agents were comparable in the basic properties,but the carbon fiber treated with the modified sizing agent had slightly higher tensile strength;and the carbon fiber reinforced resin matrix composites prepared by modified sizing agents were superior in the overall mechanical properties,with a 17.8%increase in 0°tensile strength,regular tensile cross-section,and no obvious fiber pull-out or delamination between the fiber layer and the resin layer.

关 键 词：碳纤维 上浆剂 复合材料 界面性能 力学性能 

分 类 号：TQ342.742[化学工程—化纤工业]