期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 222, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2022.109371
关键词
Flexible switch device; Thermo-responsive; NIR light-responsive; Conductive hydrogel
资金
- National Natural Science Foundation of China [11972242, 12172243, 12002232]
- Natural Science Foundation of Shanxi [20210302123158]
- China Postdoctoral Science Foundation [2020M680913]
- Fund for Shanxi 1331 project
This study developed a composite hydrogel-based flexible switch system with multi-stimulus responsive abilities. By integrating conductive composite particles into the thermal sensitive hydrogels, the resulting composite hydrogels exhibited superior conductivity, self-healing, and thermo- and NIR-responsive abilities. Moreover, these composite hydrogels served effectively as thermo- and NIR light-responsive switchers, showing excellent stimulus-responsive sensitivities.
Flexible switching devices with multi-stimulus responsive abilities have shown promising applications as smart materials in the tissue regeneration fields. Herein, a composite hydrogel-based flexible switch system was successfully designed by integrating the nano-sized conductive CNC@PPy (cellulose nanocrystal decorated with polypyrrole (PPy)) and CNC@PDA (cellulose nanocrystal decorated with polydopamine (PDA)) composite particles into the thermal sensitive poly N-isopropyl acrylamide (PNIPAM) hydrogels. The resulting composite hydrogels exhibited enhanced elastic modulus (similar to 29.5 kPa), superior conductivity (similar to 1.1 S/m), self-healing, and thermo- and NIR-responsive abilities. Particularly, the incorporated CNC@PDA and CNC@PPy particles within the hydrogel matrix by hydrogen bonds could not only provide a more continuous transporting path for electrons, but also further improve the photothermal conversion efficiency of the composite hydrogel system, in which the temperature increased by 47.6 degrees C within 10 min under NIR irradiation, and high NIR light-responsive sensitivity with a volume change of 30% within 2 min. Moreover, these composite hydrogels were developed to serve thermo- and NIR light-responsive switchers effectively, which showed excellent stimulus-responsive sensitivities. In all, this work provided a new strategy for designing the multi-stimulus responsive smart hydrogels, which demonstrated excellent potential to serve as remotely controllable switch devices in biomaterials and tissue regeneration.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据