低临界溶液温度
自愈水凝胶
材料科学
水溶液
执行机构
温度梯度
自愈
化学工程
工作(物理)
复合材料
高分子化学
聚合物
化学
计算机科学
机械工程
人工智能
工程类
物理
病理
物理化学
医学
量子力学
替代医学
共聚物
作者
E Liu,Xuehuan Xia,Qiuyue Chen,Shimei Xu
摘要
The driving principle of a thermal-responsive hydrogel that loses water at high temperature and absorbs water at low temperature limits its application in an aqueous environment. Here, a gradient hydrogel actuator was developed by introducing sodium hyaluronate into poly(N-isopropylacrylamide) hydrogel by an asymmetric mold method. The hydrogel exhibited a fast response above the LCST in air and unusual self-recovery without the need for further temperature stimuli. The actuation behavior was related to conversion from free water to bound water and water retention within the gradient matrix. The self-recovery mechanism was explored. This work provides a new insight into designing bionic hydrogels applied in a non-aqueous environment.
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