High-Sensitivity and Flexible Motion Sensing Enabled byRobust, Self-Healing Wood-Based Anisotropic Hydrogel Composites
Date
2025-02
Authors
Teng, Youchao
Zhang, Zhilei
Cui, Yunqi
Su, Zhe
Godwin, Matthew
Chung, TzuChun
Zhou, Yongzan
Leontowich, Adam F. G.
Islam, Muhammad Shahidul
Tam, Kam C.
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Small
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Article
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Abstract
By integrating polyvinyl alcohol (PVA)-borate-tannic acid (TA)-sodium sulfate into cellulosic wood matrices, a novel wood-basedPVA-borate-TA-sodium sulfate (WPBTS) hydrogel is successfully synthesized. Through a multicomponent synergistic design combining natural lignocellulose, PVA, borax, TA, and sodium sulfate, multiple dynamic cross-linking mechanisms—dynamic borate bonding, hydrogen bonding, and metal-ligand interactions—are established, resulting in WPBTS hydrogels with exceptional mechanical properties and self-healing capabilities. The mechanical strength of the WPBTS hydrogel reached an impressive 19.8 MPa, a 45-fold increase compared to PVA-borax-tannic acid (PBTS) hydrogels. Furthermore, the assembled WPBTS hydrogel-based flexible sensor demonstrates a remarkably fast response time of just 20 ms and maintains excellent performance in challenging simulated saline environments. This innovation represents a significant advancement in sensor technology and highlights the potential for transformative applications in complex and demanding scenarios.
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Keywords
sensor technology, WPBTS hydrogel, innovation
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DOI
https://doi.org/10.1002/smll.202500944