Luo Xinyi, Wang Shuai, Wu Nan, Zhang Li, He Qiancheng, Ren Lili, Song Wei
Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, College of Bionic Science and Engineering, Jilin University, Changchun 130022, China.
Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, College of Bionic Science and Engineering, Jilin University, Changchun 130022, China.; National Key Laboratory of Automotive Chassis Integration and Bionics, Jilin University, Changchun 130022, China.
Int J Biol Macromol. 2025 Aug;320(Pt 2):146012. doi: 10.1016/j.ijbiomac.2025.146012. Epub 2025 Jul 14.
Traditional hydrogel sensors have gained widespread attention in the fields of electronic skin, human-machine interaction and other applications due to their unique flexibility and biocompatibility. However, integrating multiple functions into a single hydrogel remains a challenge. Additionally, most hydrogel preparation processes are complex. This study addresses these issues by dispersing a mixed solution of carboxymethyl cellulose (CMC) and aminated carbon nanotubes into a double network hydrogel system composed of polyacrylamide (PAM) and gelatin, while adjusting the mass fraction of CMC to obtain a double network hydrogel with strong mechanical properties. The resulting hydrogel exhibits excellent mechanical performance strong toughness, and conductivity. In terms of signal detection, this hydrogel demonstrates good sensitivity and response time, making it suitable for monitoring localized movements of the human body, such as finger, wrist, elbow, and knee bending. Furthermore, this hydrogel can detect smaller strains, holding potential application value in recognizing micro-expressions and voice. More importantly, the preparation method for this hydrogel is simple, and the conditions are readily accessible, making it suitable for large-scale production. This study presents a promising approach for manufacturing tough and conductive multifunctional hydrogels, which has significant research value in the fields of wearable sensors and electronic skin.
传统水凝胶传感器因其独特的柔韧性和生物相容性，在电子皮肤、人机交互等应用领域受到广泛关注。然而，将多种功能集成到单一水凝胶中仍然是一项挑战。此外，大多数水凝胶制备过程复杂。本研究通过将羧甲基纤维素（CMC）和胺化碳纳米管的混合溶液分散到由聚丙烯酰胺（PAM）和明胶组成的双网络水凝胶体系中，同时调节CMC的质量分数，来解决这些问题，从而获得具有强机械性能的双网络水凝胶。所得水凝胶表现出优异的机械性能、强韧性和导电性。在信号检测方面，这种水凝胶具有良好的灵敏度和响应时间，适用于监测人体局部运动，如手指、手腕、肘部和膝盖弯曲。此外，这种水凝胶能够检测更小的应变，在识别微表情和语音方面具有潜在的应用价值。更重要的是，这种水凝胶的制备方法简单，条件易于实现，适合大规模生产。本研究提出了一种制造坚韧且导电的多功能水凝胶的有前景的方法，在可穿戴传感器和电子皮肤领域具有重要的研究价值。
