Ionic conductive hydrogels as promising materials have become focus of artificial soft tissue or soft stretchable electronic devices. Especially, the next‐generation flexible electronics greatly require achieving multifunction simultaneously. Herein, a transparent hydrogel with high mechanical properties (1.73 MPa for mechanical stress, 630% for mechanical strain) and excellent ionic conductivity is fabricated based on a fully physical cross‐linked network. The stiff long polyvinyl alcohol (PVA) chains as a skeleton to form a “hard” network and the short polyacrylic acid (PAA) chains regard as the “soft” network. Moreover, the biomaterial β‐cyclodextrin (β‐CD) as physical cross‐linkers is used in the “hard–soft” hybrid networks. The construction of “soft and hard” structure is successful to integrate the good transparency, remarkable mechanical properties, and outstanding sensitivity (strain, pressure, pH, and organic solvent) together for assembling multiple sensors, which hold a promising practical development value in the domain of soft wearable electronics and sensing materials in the future.

中文翻译：

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高强度和透明的离子导电水凝胶作为多功能传感器

作为有前途的材料，离子导电水凝胶已成为人造软组织或软可拉伸电子设备的焦点。特别是，下一代柔性电子产品极大地要求同时实现多功能。在此，基于完全物理交联的网络，制造了具有高机械性能（机械应力为1.73 MPa，机械应变为630％）和优异的离子电导率的透明水凝胶。刚性长聚乙烯醇（PVA）链作为骨架形成“硬”网络，而短聚丙烯酸酯（PAA）链则被视为“软”网络。此外，生物材料β-环糊精（β-CD）作为物理交联剂被用于“硬-软”混合网络。“软硬”结构的构建成功整合了良好的透明度，