Li Wei, Ming Yang, Yang Libing, Ni Yimeng, Chen Yu, Xu Weidong, Li Lefei, Zheng Chan, Lin Wanyang
College of Materials Science and Engineering, Fujian University of Technology, Fuzhou 350118, China.
College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China.
Polymers (Basel). 2025 May 16;17(10):1365. doi: 10.3390/polym17101365.
Hydrogels with conductive properties hold significant promise in the realm of flexible electronics, owing to their pliability, outstanding conductivity, and diverse functionalities. Nevertheless, the majority of conductive hydrogels are prone to being brittle and easily damaged; as such, they are not adapt to cold environments, which seriously hinders their practical applications. Therefore, hydrogels that possess both conductivity and anti-freezing, as well as moisturizing, capabilities have garnered considerable interest, and these hydrogels can work stably in harsh environments. Phytic acid (PA), which mainly exists in plant seeds, is a kind of natural compound widely existing in nature that can be recycled; it provides electrical conductivity and anti-freezing to hydrogels. Here, a highly conductive hydrogel with excellent anti-freezing and moisturizing capabilities was prepared by incorporating PA into a polyacrylamide/gelatin hydrogel. The incorporation of PA endowed the hydrogel with an excellent conductivity of 5.8 S·cm. In addition, robust hydrogen bonding was formed between water and phytic acid molecules, and the hydrogel demonstrated remarkable anti-freezing and water retention. On this basis, hydrogels can be used for human winter sports sensing and low-temperature environmental alarm devices to provide faster rescue. This study provides a novel method for the development of hydrogels with low-temperature stability, and provides a revelation for the application of anti-freezing hydrogels in icy and snowy environments.
具有导电性能的水凝胶由于其柔韧性、出色的导电性和多样的功能，在柔性电子领域具有巨大的潜力。然而，大多数导电水凝胶容易变脆且易受损；因此，它们不适应寒冷环境，这严重阻碍了它们的实际应用。所以，兼具导电性、抗冻性以及保湿能力的水凝胶引起了广泛关注，并且这些水凝胶能够在恶劣环境中稳定工作。植酸（PA）主要存在于植物种子中，是一种广泛存在于自然界且可循环利用的天然化合物；它能赋予水凝胶导电性和抗冻性。在此，通过将PA引入聚丙烯酰胺/明胶水凝胶中，制备出了一种具有优异抗冻性和保湿能力的高导电水凝胶。PA的加入使水凝胶具有5.8 S·cm的优异导电性。此外，水与植酸分子之间形成了强大的氢键，该水凝胶表现出显著的抗冻性和保水性。在此基础上，水凝胶可用于人类冬季运动传感和低温环境报警装置，以提供更快的救援。本研究为开发具有低温稳定性的水凝胶提供了一种新方法，并为抗冻水凝胶在冰雪环境中的应用提供了启示。
