Zeng Caijin, Ke Aojue, Zhang Xinya
School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou, 510640, PR China.
School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou, 510640, PR China.
Int J Biol Macromol. 2025 Aug;319(Pt 3):145533. doi: 10.1016/j.ijbiomac.2025.145533. Epub 2025 Jun 27.
Ionic conductive hydrogels (ICHs) are promising substitutes for rigid metal conductors in flexible sensors. However, integrating high strength, self-adhesion, conductivity, and anti-freezing properties remains a critical issue. Herein, a facile strategy for fabricating a mechanically robust hydrogel with remarkable conductivity and consistent self-adhesion by combining carboxymethylcellulose (CMC) and acryloyloxyethyltrimethyl ammonium chloride (ATAC), 2-acrylamide-2-methylpropanesulfonic acid (AMPS) is reported. The resulting hydrogels demonstrated high ionic conductivity (8.2 S/m), excellent mechanical properties (tensile strength: 0.5 MPa; tensile strain: >1701 %), and strong self-adhesion (up to 10.39 kPa) owing to ionic interactions and hydrogen bonding. With a gauge factor of 2.15, the hydrogels exhibited sensitive electromechanical responses, enabling reliable detection of both large and subtle human motions. When assembled into a flexible strain sensor, it exhibited high sensitivity, facilitating the detection of both significant deformations and subtle human movements. This work provides valuable insights into the rational design of cellulose-based ICHs for advanced bioelectronic applications.
离子导电水凝胶（ICHs）有望成为柔性传感器中刚性金属导体的替代品。然而，整合高强度、自粘性、导电性和抗冻性能仍然是一个关键问题。在此，报道了一种通过将羧甲基纤维素（CMC）与丙烯酰氧基乙基三甲基氯化铵（ATAC）、2-丙烯酰胺-2-甲基丙烷磺酸（AMPS）相结合来制备具有显著导电性和一致自粘性的机械坚固水凝胶的简便策略。所得水凝胶由于离子相互作用和氢键作用，表现出高离子导电性（8.2 S/m）、优异的机械性能（拉伸强度：0.5 MPa；拉伸应变：>1701%）和强自粘性（高达10.39 kPa）。该水凝胶的应变系数为2.15，表现出灵敏的机电响应，能够可靠地检测大幅度和细微的人体运动。当组装成柔性应变传感器时，它表现出高灵敏度，便于检测明显的变形和细微的人体动作。这项工作为用于先进生物电子应用的纤维素基ICHs的合理设计提供了有价值的见解。
