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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Programmable and sophisticated shape-memory behaviorviatailoring spatial distribution of polymer crosslinks
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Programmable and sophisticated shape-memory behaviorviatailoring spatial distribution of polymer crosslinks

机译:可编程和复杂的形状记忆的行为过滤聚合物交联的空间分布

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摘要

Increasing the spatial localization of material response is crucial for increasing the behavioral complexity of shape-memory polymer (SMP) actuators, which is strongly dependent on the spatial distribution of networks in SMP. An interesting approach is proposed in this study. We used diol crosslinkers with different fatty chain lengths to construct networks in biomass-derived poly(l-malic acid) (PMA) and thus obtained SMPs with different network geometries. The crosslinking followed a two-step route: esterification for pre-crosslinks, and further curing to obtain the target sample. Combining different pre-cross-linked pieces, followed by curing then, is an effective method for programming the spatial distribution of crosslinks and providing behavioral complexity to bulk SMP. Besides, using the as-obtained SMP bulk as the compound 'joint', multi-material systems with step-by-step responding capacities could be fabricated to better complete a series of sophisticated and asynchronous movements. This work enriches the approaches of combining polymer architecture and macroscale processing to improve programmable recovery and actuation in SMPs.
机译:增加材料响应的空间定位对于增加形状记忆聚合物(SMP)致动器的行为复杂性来说是至关重要的,这强烈取决于SMP中网络的空间分布。本研究提出了一种有趣的方法。我们使用具有不同脂肪链长度的二醇交联剂,以构建生物质衍生的聚(L-苹果酸)(PMA)中的网络,并因此获得具有不同网络几何形状的SMP。交联术后是两步路线:对前交联的酯化,以及进一步固化以获得靶样品。组合不同的预交联件,然后固化,是用于编程交联的空间分布并为批量SMP提供行为复杂性的有效方法。此外,使用AS获得的SMP散装作为化合物的“关节”,可以制造具有级联响应能力的多材料系统,以更好地完成一系列复杂和异步运动。这项工作丰富了聚合物架构和宏观处理的方法,以改善SMPS中的可编程恢复和致动。

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