Abstract A NIR light-induced shape memory composite with light-induced plasticity was prepared by incorporating graphene oxide (GO) into cross-linked poly (vinyl butyral) (PVB). The cross-linked reaction between PVB and aromatic diisocyanate not only endowed the composites with excellent shape memory properties, but also offered the performance of solid-state plasticity due to the formation of carbamate bonds. The photo-responsive performance was introduced to the system by doping GO, a conventional photothermal reagent, resulting in excellent NIR light-induced shape memory properties and light-induced plasticity. According to the stress relaxation tests, the solid-state plasticity of composites could be regulated by the cross-linked density, GO, catalyst dosage and temperature. Moreover, the composites can be repeatedly programmed to a new permanent shape via a light-induced plasticity process, which still exhibited excellent light-induced shape memory properties even after 5 cycles of reconfiguration. The results demonstrate the promising prospect of these composites as actuator elements for applications in self-deployment devices and soft robotic.

中文翻译：

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具有近红外光诱导形状记忆效应和固态可塑性的聚乙烯醇缩丁醛/氧化石墨烯复合材料

摘要 通过将氧化石墨烯（GO）掺入交联聚乙烯醇缩丁醛（PVB）中，制备了一种具有光致塑性的近红外光致形状记忆复合材料。PVB与芳香族二异氰酸酯之间的交联反应不仅赋予复合材料优异的形状记忆性能，而且由于形成氨基甲酸酯键而提供固态可塑性性能。通过掺杂传统的光热试剂 GO 将光响应性能引入系统，从而产生出色的 NIR 光诱导形状记忆特性和光诱导塑性。根据应力松弛试验，复合材料的固态塑性可以通过交联密度、GO、催化剂用量和温度进行调节。而且，复合材料可以通过光诱导塑性过程反复编程为新的永久形状，即使经过 5 次重新配置循环，该过程仍表现出出色的光诱导形状记忆特性。结果表明，这些复合材料作为执行器元件在自部署设备和软机器人中的应用前景广阔。