首页|超声分散时间对GO-CF增强SMPC形状记忆性能的影响

超声分散时间对GO-CF增强SMPC形状记忆性能的影响

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

ultrasonic dispersion timevacuum infiltration hot pressing systemgraphene oxidecarbon fibershape memory performance

宋晨、马玉钦、阮鸥、徐津、刘欣然、刘思濛

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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

威睿电动汽车技术(宁波)有限公司,浙江宁波 315000

极氪汽车(宁波杭州湾新区)有限公司,浙江宁波 315336

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

公共大数据国家重点实验室开放基金资助项目长安大学中央高校基本科研业务费专项资金资助项目陕西省自然科学基础研究计划资助项目教育部产学合作协同育人项目河南省高等学校重点科研项目计划资助项目

PBD2022-0193001022531052022JM-26522050629813340723A460033

2024

10.3785/j.issn.1008-973X.2024.08.007

浙江大学学报(工学版)
浙江大学

浙江大学学报(工学版)

CSTPCD北大核心
影响因子：0.625
ISSN：1008-973X
年,卷(期)：2024.58(8)
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