碳纤维增强聚醚醚酮复合材料的形状记忆效应  

Shape memory effect of carbon fibers reinforced PEEK composite

作　　者：朱世杰 张金纳 王朝阳 杨向涛 王培[1] 郭海伟 吴海宏[1,3] 仝立勇 ZHU Shijie;ZHANG Jinna;WANG Chaoyang;YANG Xiangtao;WANG Pei;GUO Haiwei;WU Haihong;TONG Liyong(Carbon Fiber Composites International Joint Research Lab in Henan,Henan University of Technology,Zhengzhou 450001,China;School of Aerospace,Mechanical and Mechatronic Engineering,The University of Sydney,Sydney 2006,Australian;Zhengzhou Fangstring Advanced Material Science and Technology Company Limited,Zhengzhou 450001,China)

机构地区：[1]河南工业大学碳纤维复合材料国际合作实验室,郑州450001 [2]悉尼大学机械电子与航空学院,悉尼2006,澳大利亚 [3]郑州仿弦新材料科技有限公司,郑州450001

出　　处：《复合材料学报》2021年第9期2832-2840,共9页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金委-河南省联合基金重点项目(U1604253);国家重点研发计划(2016YFB0101602)。

摘　　要：为推动形状记忆聚合物在空间等极端恶劣环境中的应用,以超薄碳纤维增强聚醚醚酮(Carbon fibers reinforced polyether-ether-ketone,CF/PEEK)预浸料为实验对象,采用薄膜叠层与热压成型工艺制备厚度为0.036 mm超薄预浸料的层合片材,研究了其在热应力驱动下的形状记忆行为。结果表明,在320℃加热-冷却热循环温度场的作用下,CF/PEEK复合材料超薄层合板的初始变形的形状回复率近似可达100%,当变形循环达到100次时,其形状回复率仍然可以保持在90%以上。此外,根据层合板变形的温度与应力-应变关系,解释了CF/PEEK复合材料的热应力驱动变形机制。在此基础上,改变CF/PEEK层合板厚度进行仿真设计,实现了初始状态与深海珊瑚形状、立方体、灯笼草形状之间的变形与回复。利用记忆变形产生的机械夹紧力,完成了硬币抓取实验,验证了CF/PEEK复合材料在主动变形结构应用的可行性。In order to improve the application of shape memory polymers in extreme harsh environments, the ultrathin carbon fibers reinforced polyether-ether-ketone(CF/PEEK) composite with 0.036 mm thickness was fabricated by overlapping and hot-pressing technologies, and the shape memory behaviors of the composite under the action of thermal stress were investigated. The results show the shape recovery rate of CF/PEEK composite ultrathin laminate is approximately 100%, and still has above 90% reversion rate after 100 times tests of thermal cycling action at 320℃. The stress-driving deformation mechanism of CF/PEEK composite is explained based on the relationship between temperature and stress-strain. The CF/PEEK composites with variable thickness were designed to simulate the deformation and recovery of complex shapes, containing deep-sea coral, cube and pitcher plant. Using mechanical clamping force during the deformation of CF/PEEK composite, the grasping coin experiment was carried out, which verifies the application feasibility for the active deformed structure of CF/PEEK composite.

关 键 词：聚醚醚酮 碳纤维薄层 形状记忆复合材料 热应力 形状回复率 

分 类 号：TB332[一般工业技术—材料科学与工程]