Ionic hydrogels are ideal materials for wearable sensors on the human body, typically requiring excellent mechanical properties, adhesion, self-healing, and sensing capabilities. However, traditional methods to enhance the mechanical properties of ionic hydrogels often compromise their self-healing and sensing performance. Considering this, in this study, we developed a high-strength, recyclable hydrogel with a wide monitoring range, formulated from acrylic acid, hexahydrate aluminum chloride, and polyquaternium-10. By employing a simple freeze-thaw process, the tensile strength of the hydrogel was significantly increased from 0.3 MPa to 1.89 MPa, and the elongation at break was enhanced from 900 % to 1400 %. Additionally, the hydrogel demonstrates exceptional adhesion to various substrates and possesses mechanical-electrical dual self-healing properties. The hydrogel's broad strain detection range (1%–400 %) further underscores its potential for high-performance sensing applications. Furthermore, the reconfigurable, high-density supramolecular network of hydrogels enables the reprocessing of discarded material into value-added products through a straightforward water swelling treatment. We believe that our approach offers a straightforward and efficient strategy for enhancing the mechanical properties of acrylic acid-based hydrogel sensors and, more significantly, contributes to the sustainable utilization of hydrogel materials.

中文翻译：

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可回收、高强度和机电自愈式可穿戴离子水凝胶传感器


离子水凝胶是人体可穿戴传感器的理想材料，通常需要优异的机械性能、粘附力、自愈和传感能力。然而，增强离子水凝胶机械性能的传统方法往往会损害其自愈和传感性能。考虑到这一点，在这项研究中，我们开发了一种高强度、可回收的水凝胶，具有广泛的监测范围，由丙烯酸、六水合氯化铝和聚季铵盐-10 配制而成。通过采用简单的冻融工艺，水凝胶的拉伸强度从 0.3 MPa 显著提高到 1.89 MPa，断裂伸长率从 900 % 提高到 1400 %。此外，该水凝胶对各种基材表现出优异的附着力，并具有机械-电双重自修复特性。水凝胶的宽应变检测范围 （1%–400%） 进一步强调了其在高性能传感应用中的潜力。此外，水凝胶的可重新配置、高密度超分子网络能够通过简单的水溶胀处理将废弃材料再加工成增值产品。我们相信，我们的方法为增强丙烯酸基水凝胶传感器的机械性能提供了一种简单而有效的策略，更重要的是，有助于水凝胶材料的可持续利用。