Wei Jinmei, Liu Chenglu, Shi Lin, Liu Yongping, Lu Huidan
Guilin University of Technology, Coll Chem & Bioengn, Guangxi, Guilin 541004, China; Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
Guilin University of Technology, Coll Chem & Bioengn, Guangxi, Guilin 541004, China; Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
Int J Biol Macromol. 2025 Mar;292:138813. doi: 10.1016/j.ijbiomac.2024.138813. Epub 2024 Dec 16.
Conductive hydrogels based on sodium alginate (SA) have potential applications in human activity monitoring and personal medical diagnosis due to their good conductivity and flexibility. However, most sensing SA-hydrogels exhibit poor mechanical properties and lack of self-healing, self-adhesive, and antibacterial properties, greatly limiting their practical applications. Therefore, in this paper, a multifunctional double-network PAA-SA hydrogel consisting of poly(acrylic acid) (PAA) and sodium alginate (SA) was prepared by a simple strategy. As a rigid network structure, SA endowed the hydrogel double network structure with excellent mechanical performance. As a wearable sensor, the PAA-SA hydrogel exhibited excellent tensile properties (strain: 1799.2 %), self-healing, high sensitivity (GF = 9.9), reliable repeatability, self-adhesive, 3D printability and antibacterial activity. Additionally, the highly sensitive wearing sensing PAA-SA hydrogel could accurately and real-time monitor various intense or subtle human movements, such as joint bending, face and throat vibration. Moreover, PAA-SA hydrogels were not only used for handwritten recognition of Arabic numerals and English letters, but also for real-time sensing of temperature changes and monitoring of human sweating. The prepared multifunctional wearable sensing hydrogel has the advantages of simple and versatile methods and low cost, making it a promising candidate for applications in different fields such as electronic skin, soft robotics, and medical monitoring.
基于海藻酸钠（SA）的导电水凝胶因其良好的导电性和柔韧性在人体活动监测和个人医疗诊断方面具有潜在应用。然而，大多数传感SA水凝胶表现出较差的机械性能，并且缺乏自愈、自粘和抗菌性能，这极大地限制了它们的实际应用。因此，本文通过一种简单的策略制备了一种由聚丙烯酸（PAA）和海藻酸钠（SA）组成的多功能双网络PAA-SA水凝胶。作为一种刚性网络结构，SA赋予水凝胶双网络结构优异的机械性能。作为一种可穿戴传感器，PAA-SA水凝胶表现出优异的拉伸性能（应变：1799.2%）、自愈性、高灵敏度（GF = 9.9）、可靠的重复性、自粘性、3D可打印性和抗菌活性。此外，高灵敏度的可穿戴传感PAA-SA水凝胶能够准确实时地监测各种剧烈或细微的人体运动，如关节弯曲、面部和喉咙振动。而且，PAA-SA水凝胶不仅用于阿拉伯数字和英文字母的手写识别，还用于温度变化的实时传感和人体出汗监测。所制备的多功能可穿戴传感水凝胶具有方法简单通用、成本低的优点，使其成为电子皮肤、软体机器人和医疗监测等不同领域应用的有前途的候选材料。
