Ductile Shape-Memory Polymer Composite with Enhanced Shape Recovery Ability
Ductile Shape-Memory Polymer Composite with Enhanced Shape Recovery Ability
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DOI：
10.1021/acsami.0c18413
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发表时间：
2020-12-30
影响因子：
9.5
通讯作者：
Mirzaeifar, Reza
中科院分区：
文献类型：
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作者：
Peng, Kaiyuan;Zhao, Yao;Mirzaeifar, Reza
近年来，形状记忆聚合物(SMPS)作为执行器在医疗和机器人设备中的广泛应用受到了广泛的关注。它们恢复大变形的能力和远程刺激的能力使开关电源成为各种应用中不同智能材料的优越选择。本研究合成了一种具有增强形状回复能力的韧性SMP复合材料，并对其进行了表征。这种SMP复合材料是由以丙烯酸酯为基础的交联剂和单体以及具有UV固化的聚苯乙烯(PS)的混合物制成的。该复合材料在热水或热空气中均可在2分钟内达到近100%的形状恢复率。这种形状恢复速度比典型的丙烯酸酯基开关电源快得多。此外，复合材料表现出良好的延展性和粘弹性，但硬度降低。采用分子动力学(MD)模拟方法对该复合材料的固化机理进行了研究。实验和计算工作相结合，为未来SMP器件的设计和优化铺平了道路。
In recent years, shape-memory polymers (SMPs) have received extensive attention to be used as actuators in a broad range of applications such as medical and robotic devices. Their ability to recover large deformations and their capability to be stimulated remotely have made SMPs a superior choice among different smart materials in various applications. In this study, a ductile SMP composite with enhanced shape recovery ability is synthesized and characterized. This SMP composite is made by a mixture of acrylate-based crosslinkers and monomers, as well as polystyrene (PS) with UV curing. The composite can achieve almost 100% shape recovery in 2 s by hot water or hot air. This shape recovery speed is much faster than typical acrylate-based SMPs. In addition, the composite shows excellent ductility and viscoelasticity with reduced hardness. Molecular dynamics (MD) simulations are performed for understanding the curing mechanism of this composite. With the combination of the experimental and computational works, this study paves the way in front of designing and optimizing the future SMP devices.