材料科学
弹性体
聚二甲基硅氧烷
双层
自愈水凝胶
复合材料
图层(电子)
执行机构
粘附
化学工程
高分子化学
膜
化学
生物化学
电气工程
工程类
作者
Xuefeng Li,Yuliang Zhao,Danni Xu,Dapeng Li,Wei Wang,Dezheng Hu,Yiwan Huang,Shijun Long
出处
期刊:Polymer
[Elsevier]
日期:2023-11-01
卷期号:286: 126381-126381
标识
DOI:10.1016/j.polymer.2023.126381
摘要
Thermoresponsive hydrogel-based actuators have shown great potential in tissue engineering, biosensors and soft robots, while the preparation of temperature-driven bilayer hydrogel actuators with rapid responseness and recovery properties remains a challenge. Inspired by the layered heterostructure of human skin, we developed a Janus bilayer structure actuator consisting of thermoresponsive double network (TDN) hydrogel and polydimethylsiloxane (PDMS) elastomer with tough interface adhesion. Specifically, PNaAMPS/P(NIPAM-co-AAm) TDN hydrogel via photocopolymerization of N-isopropyl acrylamide (NIPAM) and acrylamide (AAm) and reinforced by microgel poly(2-acrylamide-2-methylpropane sulfonate sodium salt) (PNaAMPS) was in situ grafted onto benzophenone-activated PDMS surface, exhibiting strong interface adhesion (628 Jm-2 adhesion energy). The thermoresponsive shape deformations of the double-layer structure actuator were controllable by adjusting hydrogel/elastomer thickness ratio and introduction of metal ions, taking advantage of the different swelling and shrinkage characteristics of the hydrogel layer and the elastomer layer. The TDN/PDMS bilayer structure actuator, which integrates the "Janus" structure, thermal responsiveness and photothermal conversion, provides new ideas for the application and remote control of soft robots and soft actuators.
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