The salting-out action and the cation-induced-crosslinking reaction have been reported separately for the preparation of conductive hydrogels, but there are few studies on the synergistic effect of these two interactions. Also, how to construct flexible strain sensors with more functions is rarely reported by introducing multiple ions through the simple immersion method based on the synergistic action of two kinds of ions. Herein, a polyvinyl alcohol (PVA)/O-carboxymethyl chitosan (O-CMCS)-based composite conductive organohydrogel POAPZ was designed and fabricated by replacing pure water solvent with nano-silver particles (AgNPs) solution, followed by the immersion treatment in the PDO (1, 3-propylene glycol)-ZnSO (zinc sulfate) blended solution. Due to the synergistic effect of crosslinking coordination, salting out and hydrogen bonding, the electromechanical properties and sensing behavior of the resulting organohydrogel POAPZ were almost unchanged at room temperature and long-term storage conditions. The flexible electronic device, constructed by this organohydrogel, exhibited considerable anti-freezing, moisturizing, antibacterial, conductive (1.4 S/m) and mechanical properties (fracture stress of 2.2 MPa), and could be used as strain sensor to monitor human movement at room or low temperatures, including large-scale and subtle body movements and bioelectrical signals, which is a long-term wearable sports health monitoring system. In summary, this work successfully constructed an organic flexible electronic device POAPZ with the advantage of remaining good mechanical durability and applicability under harsh environmental conditions, and the fabrication strategy used provides a new idea for the construction of conductive hydrogel via ion immersion procedure.

中文翻译：

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多功能PVA/壳聚糖导电有机水凝胶作为应变和生物电传感器的协调/盐析协同构建

盐析作用和阳离子诱导交联反应用于导电水凝胶的制备已分别报道，但关于这两种相互作用的协同效应的研究很少。此外，如何基于两种离子的协同作用，通过简单的浸没方法引入多种离子来构建具有更多功能的柔性应变传感器的报道也很少。本文通过用纳米银颗粒（AgNPs）溶液代替纯水溶剂，然后在水中浸泡处理，设计并制备了聚乙烯醇（PVA）/O-羧甲基壳聚糖（O-CMCS）基复合导电有机水凝胶POAPZ。 PDO（1, 3-丙二醇）-ZnSO（硫酸锌）混合溶液。由于交联配位、盐析和氢键的协同作用，所得有机水凝胶POAPZ的机电性能和传感行为在室温和长期储存条件下几乎没有变化。由这种有机水凝胶构建的柔性电子器件具有良好的防冻、保湿、抗菌、导电（1.4 S/m）和机械性能（断裂应力为2.2 MPa），可用作应变传感器来监测人体运动室温或低温下，包括大规模和细微的身体运动和生物电信号，这是一个长期可穿戴运动健康监测系统。综上所述，本工作成功构建了有机柔性电子器件 POAPZ，在恶劣环境条件下仍具有良好的机械耐久性和适用性，并且所采用的制造策略为离子浸没过程构建导电水凝胶提供了新思路。