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首页> 外文期刊>Materials science & engineering >Strong, tough, anti-freezing, non-drying and sensitive ionic sensor based on fully physical cross-linked double network hydrogel
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Strong, tough, anti-freezing, non-drying and sensitive ionic sensor based on fully physical cross-linked double network hydrogel

机译：基于全物理交联双网络水凝胶的强，坚韧，抗冻干，不干燥和敏感的离子传感器

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摘要

Ionic conductive double network (DN) sensors have attracted increasing attention in wearable electronic devices. However, their low mechanical and sensing properties as well as poor moisture retention and freezing resistance restrict severely their applications. Herein, we synthesized a fully physical cross-linked poly (N-hydroxymethyl acrylamide)/agar/ethylene glycol (PHA/Agar/EG) ionic conductive DN hydrogel exhibiting high strength and toughness, fast self-recovery, good fatigue resistance and good self-healing. Agar could form a physical network via reversible sol-gel transition, and interact with physical cross-linked poly (N-hydroxymethyl acrylamide) and sodium chloride (NaCl) via hydrogen bonds and salting-out effect, respectively. Meanwhile, ethylene glycol and NaCl improved the mechanical properties, long-lasting moisture retention and anti-freezing ability. The PHA/ Agar/EG gel-based flexible sensor possessed excellent long-lasting and fatigue resistant sensing properties, and could monitor various human activities stably and sensitively. Therefore, this work would provide a simple and promising strategy to fabricate flexible sensors with integrated high performances for smart wearable devices.
机译：离子导电双网络（DN）传感器在可穿戴电子设备中引起了不断的关注。然而，它们的低机械和传感性能以及差的水分保留和冷冻电阻严重限制了它们的应用。在此，我们合成了一种全物理交联聚（N-羟甲基丙烯酰胺）/琼脂/乙二醇（PHA /琼脂/例如）离子导电DN水凝胶，其具有高强度和韧性，快速自我恢复，良好的疲劳性和良好的自我-康复。琼脂可以通过可逆溶胶 - 凝胶过渡形成物理网络，并通过氢键和盐键和盐酸钠（NaCl）与氯化钠和盐酸钠相互作用。同时，乙二醇和NaCl改善了机械性能，持久的水分保留和抗冻干能力。 PHA /琼脂/例如基于凝胶的柔性传感器具有优异的持久性和疲劳感的感测性能，并且可以稳定和敏感地监测各种人类活动。因此，这项工作将提供一种简单且有希望的策略来制造具有集成高性能的柔性传感器，可用于智能可穿戴设备。

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