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A Novel Anisotropic Hydrogel with Integrated Self‐Deformation and Controllable Shape Memory Effect
Macromolecular Rapid Communications ( IF 4.6 ) Pub Date : 2018-03-13 , DOI: 10.1002/marc.201800019
Xiao-xia Le 1, 2 , Yu-chong Zhang 1, 2 , Wei Lu 1, 2 , Li Wang 1, 2 , Jing Zheng 1, 2 , Israt Ali 1, 2 , Jia-wei Zhang 1, 2 , You-ju Huang 1, 2 , Michael J. Serpe 3 , Xi-tao Yang 4 , Xin-dong Fan 4 , Tao Chen 1, 2
Affiliation  

Although shape memory polymers have been highlighted widely and developed rapidly, it is still a challenging task to realize complex temporary shapes automatically in practical applications. Herein, a novel shape memory hydrogel with the ability of self‐deformation is presented. Through constructing an anisotropic poly(acrylic acid)–polyacrylamide (PAAc–PAAm) structure, the obtained hydrogel exhibits stable self‐deformation behavior in response to pH stimulus, and the shapes that formed automatically can be fixed by the coordination between carboxylic groups and Fe3+; therefore, self‐deformation and shape memory behaviors are integrated in one system. Moreover, the magnitude of auto‐deformation and shape memory could be adjusted with the concentration of corresponding ions, leading to programmable shape memory and shape recovery processes.

中文翻译:

具有集成自变形和可控形状记忆效应的新型各向异性水凝胶

尽管形状记忆聚合物已被广泛地强调并迅速发展,但是在实际应用中自动实现复杂的临时形状仍然是一项艰巨的任务。本文提出了一种具有自变形能力的新型形状记忆水凝胶。通过构建各向异性的聚丙烯酸酯-聚丙烯酰胺(PAAc-PAAm)结构,获得的水凝胶在pH刺激下表现出稳定的自变形行为,并且通过羧基与Fe的配位可以固定自动形成的形状3+; 因此,自变形和形状记忆行为集成在一个系统中。此外,可以根据相应离子的浓度调整自动变形和形状记忆的幅度,从而实现可编程的形状记忆和形状恢复过程。
更新日期:2018-03-13
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