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浙江大学学报(工学版)
Journal of ZheJiang University (Engineering Science)  2024, Vol. 58 Issue (8): 1596-1603    DOI: 10.3785/j.issn.1008-973X.2024.08.007
    
Effect of ultrasonic dispersion time on shape memory performance of GO-CF reinforced SMPC
Chen SONG1(),Yuqin MA1,*(),Ou RUAN2,Jin XU3,Xinran LIU1,Simeng LIU1
1. Key Laboratory of Road Construction Technology and Equipment of MOE, Chang'an University, Xi'an 710064, China
2. Viridi E-Mobility Technology (Ningbo) Limited Company, Ningbo 315000, China
3. Polar Krypton Automobile (Ningbo Hangzhou Bay New Area) Limited Company, Ningbo 315336, China
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Abstract  

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.

Key words： ultrasonic dispersion time      vacuum infiltration hot pressing system      graphene oxide      carbon fiber      shape memory performance     
Received: 14 September 2023      Published: 23 July 2024
CLC:  TB 332  
Fund:  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）.
Corresponding Authors: Yuqin MA     E-mail: chen-song@chd.edu.cn;yqma@chd.edu.cn
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Chen SONG
Yuqin MA
Ou RUAN
Jin XU
Xinran LIU
Simeng LIU
Cite this article:

Chen SONG,Yuqin MA,Ou RUAN,Jin XU,Xinran LIU,Simeng LIU. Effect of ultrasonic dispersion time on shape memory performance of GO-CF reinforced SMPC. Journal of ZheJiang University (Engineering Science), 2024, 58(8): 1596-1603.

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https://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2024.08.007     OR     https://www.zjujournals.com/eng/Y2024/V58/I8/1596


超声分散时间对GO-CF增强SMPC形状记忆性能的影响

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.


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 
Fig.1 Schematic diagram of GO-CF hybrid-enhanced SMPC immobilization process
Fig.2 Schematic diagram of GO-CF hybrid-enhanced SMPC reply process
Fig.3 Microscopic morphology of GO-CF hybrid-enhanced SMPC ultrasonically dispersed for 70 min
Fig.4 Microstructure morphology of CF surface with different ultrasonic dispersion time
Fig.5 Schematic diagram of mechanical interlock
Fig.6 Shape fixation ratio of SMPC with different ultrasonic dispersion time
Fig.7 Shape recovery ratio of SMPC with different ultrasonic dispersion time
Fig.8 Crack generation and extension of delamination in specimens dispersed by ultrasonic dispersion for 30 min
Fig.9 Schematic diagram of crosslinked structure of composite material
Fig.10 Temperature-recovery force of composites with different ultrasonic dispersion time
Fig.11 Mean recovery ratio of SMPC with different ultrasonic dispersion time
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