伪装
自愈
材料科学
红外线的
纳米技术
金属
光学
计算机科学
冶金
医学
人工智能
物理
病理
替代医学
作者
Xiaofei Li,Miao Jiang,Yiming Du,Xin Ding,Chao Xiao,Yanyan Wang,Yanyu Yang,Yizhi Zhuo,Kang Zheng,Xianglan Liu,Lin Chen,Yi Gong,Xingyou Tian,Xian Zhang
出处
期刊:Materials horizons
[The Royal Society of Chemistry]
日期:2023-01-01
卷期号:10 (8): 2945-2957
被引量:51
摘要
Due to their mechanical flexibility, conductive hydrogels have been widely investigated in the fields of flexible electronics and soft robots, but their non-negligible disadvantages, such as poor toughness and limited self-healing, severally restrict their practical application. Herein, gallium indium alloy (EGaIn) is utilized to initiate the polymerization and simultaneously serve as flexible fillers to construct a super-stretchable and self-healing liquid metal/polyvinyl alcohol/p(acrylamide-co-octadecyl methacrylate) (liquid metal/PVA/P(AAm-co-SMA)) double network hydrogel (LM hydrogel). The synergistic effect of the rigid PVA microcrystal network and the ductile P(AAm-co-SMA) hydrophobic network, together with the ionic coordination and hydrogen bonds between polymer networks (multiple physical cross-links), endow the LM hydrogel with excellent super-stretchability (2000%), toughness (3.00 MJ m-3), notch resistance, and self-healing property (healing efficiency > 99% at 25 °C after 24 h). The LM hydrogel exhibits sensitive strain sensing behavior, allowing human-computer interaction to achieve motion recognition and health monitoring. Significantly, owing to the excellent photothermal effect and low infrared emissivity of EGaIn, the LM hydrogel reveals great potential in infrared camouflage. The work of self-healing conductive liquid metal hydrogels will promote the research and practical application of hydrogels and liquid metal in intelligent devices and military fields.
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