Key Laboratory of Polymer Materials and Products of Universities in Fujian, Department of Materials Science and Engineering, Fujian University of Technology, Fuzhou, Fujian 350118, China.
School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, Hubei 430068, China.
Int J Biol Macromol. 2024 Jul;273(Pt 2):133151. doi: 10.1016/j.ijbiomac.2024.133151. Epub 2024 Jun 14.
Hydrogel fibers play a crucial role in the design and manufacturing of flexible electronic devices. However, continuous production of hydrogel fibers with high strength, toughness, and conductivity remains a significant challenge. In this study, ion-conductive sodium alginate/polyvinyl alcohol composite hydrogel fibers with an interlocked dual network structure were prepared through continuous wet spinning based on the pH-responsive dynamic borate ester bonds. Owing to the interlocked dual network structure, the resulting hydrogel fibers integrated superior performance of strength (4.31 MPa), elongation-at-break (>1500 %), ion conductivity (17.98 S m) and response sensitivity to strain (GF = 3.051). Benefiting from the excellent performance, the composite hydrogel fiber could be applied as motion-detecting sensors, including high-frequency, high-speed reciprocating mechanical motion, and human motion. Furthermore, the superior compatibility for human-computer interaction of the hydrogel fiber was also demonstrated, which a manipulator could be controlled to perform different actions, by a smart glove equipped with the hydrogel fiber sensors.
水凝胶纤维在设计和制造柔性电子设备中起着至关重要的作用。然而，连续生产具有高强度、韧性和导电性的水凝胶纤维仍然是一个重大挑战。在这项研究中，通过基于 pH 响应的动态硼酸酯键的连续湿法纺丝，制备了具有互锁双重网络结构的离子导电海藻酸钠/聚乙烯醇复合水凝胶纤维。由于互锁的双重网络结构，所得水凝胶纤维综合了高强度（4.31 MPa）、断裂伸长率（>1500%）、离子电导率（17.98 S m）和应变响应灵敏度（GF = 3.051）的优异性能。得益于优异的性能，复合水凝胶纤维可用作运动检测传感器，包括高频、高速往复机械运动和人体运动。此外，还证明了水凝胶纤维具有出色的人机交互兼容性，通过配备水凝胶纤维传感器的智能手套，可以控制操纵器执行不同的动作。
