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Jia Yang,Jiajia Hao,Chen Tang,Yaxin Guo,Mingxin Guo,Zhipeng Li,Shuzheng Liu,Hui Yu,Gang Qin,Qiang Chen 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.116 No.-
Although many hydrogels have been applied to wearable sensors, it is still challenging to simultaneouslyrealize hydrogels with optical transparency, superior mechanical properties, excellent sensing performance,and anti-freezing by using inexpensive raw materials and an easy preparation process. Herein,using ethylene glycol/H2O (EG/ H2O) as a solvent, poly(vinyl alcohol)/EG organohydrogel (PVA/EGOHG) was prepared by a simple heating and frozen-thawing method. Owing to the multifunctionalityof EG (i.e., physical cross-linker, anti-freezer and co-solvent), PVA/EG OHG demonstrated excellent integratedproperties, including high strength, high toughness, and anti-freezing performances. Besides, PVA/EG OHG also showed low friction, self-cleaning, and frost resistance properties. After the introduction ofLiCl, ionically conductive PVA/EG @LiCl organohydrogel was served as a self-cleaning strain sensor, whichcould be long-term stable to detect the motions of human under room and low temperatures. The studyprovides to further understanding of the organohydrogel, which will help us design next-generationhigh-performance organohydrogels.
Jia Yang,Qiong Kang,Bin Zhang,Xiyu Tian,Shuzheng Liu,Gang Qin,Qiang Chen 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-
Ionic conductive hydrogel-based sensors have been capturing growing attention in various areas, but stillcannot satisfy the operating requirements of next generation wearable electronics. Herein, inspired bybiosystems, we demonstrate ionic conductive supramolecular hydrogels with simple one-step methodbased on salting-out effect and multiple hydrogen bond interactions. The supramolecular hydrogels exhibithigh toughness and strength, quick self-recovery, high sensitive sensing performance as well as goodself-healing, fatigue and frost resistances in mechanical and sensing properties, and can monitor largeand subtle movements and physiological activities of the human body sensitively, quickly and stably. Thus, it provides a convenient and promising way to obtain stretchable sensors of excellent comprehensiveproperties, which have tremendous application potential as wearable electronic devices in harshenvironments.