Bioinspired conductive cellulose liquid-crystal hydrogels as multifunctional electrical skins

Proceedings of the National Academy of Sciences of the United States of America
Zhuohao ZhangYuanjin Zhao

Abstract

Bionic electronic skin (E-skin) that could convert external physical or mechanical stimuli into output signals has a wide range of applications including wearable devices, artificial prostheses, software robots, etc. Here, we present a chameleon-inspired multifunctional E-skin based on hydroxypropyl cellulose (HPC), Poly(Acrylamide-co-Acrylic acid) (PACA), and carbon nanotubes (CNTs) composited liquid-crystal hydrogel. We found that the HPC could still form cholesteric liquid-crystal photonic structures with the CNTs additive for enhancing their color saturation and PACA polymerization for locating their assembled periodic structures. As the composite hydrogel containing HPC elements and the PACA scaffold responds to different stimuli, such as temperature variations, mechanical pressure, and tension, it could correspondingly change its volume or internal nanostructure and report these as visible color switches. In addition, due to the additive of CNTs, the composite hydrogel could also output these stimuli as electrical resistance signals. Thus, the hydrogel E-skins had the ability of quantitatively feeding back external stimuli through electrical resistance as well as visually mapping the stimulating sites by color variation. ...Continue Reading

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Citations

Nov 20, 2020·Macromolecular Rapid Communications·Jess M CloughStephen Schrettl
Jan 22, 2021·The Analyst·Tianshu ChuBingbing Gao
Mar 10, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Michelle M Makhoul-Mansour, Eric C Freeman
Mar 14, 2021·Carbohydrate Polymers·Chengyuan SunXinling Wang
May 21, 2021·ACS Applied Materials & Interfaces·Zhujun ZengYongqing Xia
Jun 18, 2021·ACS Applied Materials & Interfaces·Jingxuan XuWei Huang
Aug 8, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Xiao HuPeter Gawason
Oct 21, 2020·ACS Applied Materials & Interfaces·Gang Yeol YooYoung Rag Do
Sep 4, 2021·Advanced Materials·Minkyu KimVladimir V Tsukruk
Sep 11, 2021·Macromolecular Rapid Communications·Huijing LiTao Chen
Nov 17, 2021·ACS Biomaterials Science & Engineering·Yangzhi ZhuAli Khademhosseini

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