聚硫辛酸基离子凝胶在柔性传感领域的研究进展

Research progress on poly-lipoic acid-based ionogels in flexible sensing

  • 摘要: 柔性传感器因其出色的柔韧性、轻量化特性及与运动基底的良好贴合性,在可穿戴设备、人机交互和健康监测等领域展现出巨大的应用潜力。硫辛酸作为一种天然小分子,独特的分子结构包含羧基和动态二硫键,使其可以通过自组装构建新型柔性传感材料。然而,基于纯聚硫辛酸的聚合物网络因分子间二硫键的动态不稳定性而呈现亚稳态,限制了其应用。离子液体与聚硫辛酸高分子链间的氢键、静电等相互作用,可以有效抑制二硫键的断裂,提高聚硫辛酸基离子凝胶的性能稳定性。本文综述了不同类型的聚硫辛酸基离子凝胶柔性传感器,详细阐述了其在医疗健康、智能穿戴、人机交互等领域的应用实例,并深入分析了当前聚硫辛酸基离子凝胶柔性传感材料所面临的挑战,对该领域未来的发展方向进行了展望。

     

    Abstract: Flexible sensors have demonstrated significant application potential in wearable devices, human-machine interaction, and health monitoring due to their excellent flexibility, lightweight characteristics, and good conformability with moving substrates. Lipoic acid, a natural small molecule containing carboxyl groups and dynamic disulfide bonds in its unique molecular structure, shows promise for constructing novel flexible sensing materials through self-assembly. However, pure poly-lipoic acid polymer networks exhibit metastable states due to the dynamic instability of intermolecular disulfide bonds, limiting their practical applications. The interactions (including hydrogen bonding and electrostatic forces) between ionic liquids and poly-lipoic acid polymer chains can effectively inhibit disulfide bond cleavage, thereby enhancing the performance stability of poly-lipoic acid-based ionogels. This review systematically summarizes various types of poly-lipoic acid-based ionogel flexible sensors,elaborates their application cases in healthcare, smart wearables, and human-machine interaction, thoroughly analyzes current challenges in poly-lipoic acid-based ionogel flexible sensing materials, and provides perspectives on future development directions in this field.

     

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