School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China.
School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China.
Int J Biol Macromol. 2024 Nov;280(Pt 4):136105. doi: 10.1016/j.ijbiomac.2024.136105. Epub 2024 Sep 27.
Intrinsic environmental and stability limitations of hydrogels have inhibited their practical applications as a flexible wearable device due to water evaporation or freezing in complex environments such as low temperatures and arid environments. In this work, a multifunctional gelatin based ionic conductive eutectogel with double network structure is designed via ternary deep eutectic solvent (DES) (acrylic acid (AA), choline chloride (ChCl) and ethylene glycol (EG)). In this system, the introduction of ethylene glycol (EG) can be used to dissolve gelatin. The resulting DESG eutectogel exhibited excellent adhesion, mechanical robustness, anti-freeze, anti-drying, and self-healing. Interestingly, the DESG gels showed high humidity sensitivity in a wide humidity detection range (11 %-83 %), which can be assembled as a self-powdered humidity sensor to monitor human mouth and nose breathing. This work is expected to bring new prospect to construct high performance humidity sensors using gelatin based humidity-responsive materials for a wide range of potential applications in respiratory diagnostics, sleep monitoring, electronic skin and wearable electronics.
由于水的蒸发或在复杂环境（如低温和干旱环境）中的冻结，水凝胶固有的环境和稳定性限制了其作为柔性可穿戴设备的实际应用。在这项工作中，通过三元深共晶溶剂（DES）（丙烯酸（AA）、氯化胆碱（ChCl）和乙二醇（EG））设计了一种具有双网络结构的多功能明胶基离子导电共晶水凝胶。在该体系中，乙二醇（EG）的引入可以用来溶解明胶。所得的 DESG 共晶水凝胶表现出优异的附着力、机械鲁棒性、抗冻、抗干燥和自修复能力。有趣的是，DESG 凝胶在较宽的湿度检测范围内（11%-83%）表现出高湿度敏感性，可组装成自粉化湿度传感器，以监测人体口鼻呼吸。这项工作有望为使用基于明胶的湿度响应材料构建高性能湿度传感器带来新的前景，这些传感器在呼吸诊断、睡眠监测、电子皮肤和可穿戴电子等广泛领域具有潜在应用。
