期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 9, 期 2, 页码 -出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta09101d
关键词
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资金
- National Major Scientific and Technological Special Project for Significant New Drugs Development [2018ZX09J18111-04]
- Innovation Project of Military Medicine [16CXZ007]
- Distinguished Scholars Foundation of Jiangsu Province [JCRCB2016006]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX20_0150, KYCX20_1246]
This study developed an electronic skin with antibacterial, color-variable, UV-sensitive, shape-adaptive, and immunoregulatory functions, which can simulate the comprehensive functions of real skin. By combining single- and dual-network hydrogel structures with chemical reactions, it achieved the perception of UV and human motions.
Simulating the comprehensive functions of native skin-and not simply the perception of external physical stimuli-by electronic skin (e-skin) has gathered increasing attention in the development of wearable devices and human-interactive technology. Here, we report an anti-bacterial, color-variable, ultraviolet (UV)-sensitive, shape-adaptive, and immunoregulatory e-skin based on a single- and dual-network switchable hydrogel composed of a covalent network of polyacrylamide (PAAm) and a coordinated network of xanthan gum (Xg)/iron ions [Fe(iii)]. In the presence of sodium lactate and UV exposure, Fe(iii) could be reduced to Fe(ii), which de-coordinated the Xg/Fe(iii) network. During this reduction process, the e-skin realized three functions of real skin: (i) UV triggered a color change with detectable resistance alterations; (ii) reactive oxygen species (ROS) were dramatically produced to defend against pathogens; and (iii) the piezoresistant hydrogel became highly stretchable to perceive all-scale human motions. Moreover, the shear-thinning properties of Xg in the precursor solution allowed the e-skin to be printable, and the anti-inflammatory functions of de-coordinated Xg were beneficial for wound healing. In summary, this newly-developed e-skin can achieve the perception of UV and human motions. It has promising applications for irregularly-shaped body surfaces and infected wounds.
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