超声分散时间对GO-CF增强SMPC形状记忆性能的影响  

Effect of ultrasonic dispersion time on shape memory performance of GO-CF reinforced SMPC

作　　者：宋晨 马玉钦 阮鸥 徐津 刘欣然 刘思濛 SONG Chen;MA Yuqin;RUAN Ou;XU Jin;LIU Xinran;LIU Simeng(Key Laboratory of Road Construction Technology and Equipment of MOE,Chang'an University,Xi'an 710064,China;Viridi E-Mobility Technology(Ningbo)Limited Company,Ningbo 315000,China;Polar Krypton Automobile(Ningbo Hangzhou Bay New Area)Limited Company,Ningbo 315336,China)

机构地区：[1]长安大学道路施工技术与装备教育部重点实验室,陕西西安710064 [2]威睿电动汽车技术(宁波)有限公司,浙江宁波315000 [3]极氪汽车(宁波杭州湾新区)有限公司,浙江宁波315336

出　　处：《浙江大学学报（工学版）》2024年第8期1596-1603,共8页Journal of Zhejiang University：Engineering Science

基　　金：公共大数据国家重点实验室开放基金资助项目(PBD 2022-019);长安大学中央高校基本科研业务费专项资金资助项目(300102253105);陕西省自然科学基础研究计划资助项目(2022JM-265);教育部产学合作协同育人项目(220506298133407);河南省高等学校重点科研项目计划资助项目(23A460033).

摘　　要：为了研究超声分散时间对形状记忆聚合物复合材料(SMPC)微观组织和形状记忆性能的影响,采用真空浸渗热压工艺制备6组不同超声分散时间的GO-CF混杂增强SMPC,通过扫描电子显微镜表征SMPC的微观组织形貌,开展形状记忆性能的测试.结果表明,适当的超声分散时间可以将GO剥离成片状结构并均匀分散在SMPC中,形成机械联锁和化学键合.随着超声分散时间的增加,SMPC的形状固定率和形状回复率呈现先增大后减小的趋势,除30 min外,其他SMPC的平均回复速率呈现先减小后增大的趋势,当超声分散60 min时,SMPC具有最佳的形状记忆性能,形状固定率和形状回复率分别达到97.85%和97.30%,最大回复力为10.47 N,平均形状回复速率为1.04°/s,机械联锁和化学键合这种复合结构的增加有利于增强SMPC的形状记忆性能,但需要更多的能量来实现SMPC的形状回复.Six groups of GO-CF hybrid reinforced SMPC with different ultrasonic dispersion time were prepared by using vacuum infiltration hot pressing system in order to analyze the effect of ultrasonic dispersion time on the microstructure and shape memory performance of shape memory polymer composites(SMPC).The microstructure morphology of SMPC was characterized by scanning electron microscopy,and shape memory performance tests were conducted.Results show that appropriate ultrasonic dispersion time can peel GO into sheet-like structures and disperse uniformly in SMPC,forming mechanical interlocking and chemical bonding.The shape fixation ratio and shape recovery ratio of SMPC show a trend of first increasing and then decreasing with the increase of ultrasonic dispersion time.The mean recovery ratio of other SMPC shows a trend of first decreasing and then increasing except for 30 minutes.SMPC exhibits the best shape memory performance when the ultrasonic dispersion time is 60 minutes,with shape fixation ratio and shape recovery ratio reaching 97.85%and 97.30%respectively,maximum recovery force of 10.47 N,mean shape recovery ratio of 1.04°/s.The increase of this composite structure of mechanical interlocking and chemical bonding is beneficial to enhance the shape memory performance of SMPC,but more energy is required to achieve the shape recovery of SMPC.

关 键 词：超声分散时间 真空浸渗热压工艺 氧化石墨烯 碳纤维 形状记忆性能 

分 类 号：TB332[一般工业技术—材料科学与工程]