Huang Jianbo, Zhao Lijun, Xiang Pengtong, Zhang Fan, Yang Yang, Chao Lumen, Liu Wen, Li Hongkai, Zhang Xueming
National Pulp and Paper Research Institute Co., Ltd., Beijing 100102, China.
The Paper Industry Productivity Promotion Center, Quzhou, Zhejiang Province 324000, China.
Langmuir. 2025 Jun 24;41(24):15484-15493. doi: 10.1021/acs.langmuir.5c01389. Epub 2025 Jun 9.
Hydrogels play a significant role in the flexibility, stretchability, and conductivity of wearable sensors. However, it is still a challenge to achieve multifunctional hydrogel sensors with excellent mechanical strength, outstanding self-adhesion, and high stimulus responsiveness for meeting various demands of practical applications. Here, this work presents a one-pot method to prepare a conductive hydrogel with multifunction by introducing aminated lignosulfonate (A-LS) and aminated cellulose nanocrystals (A-CNC) into the hydrogel matrix. Benefiting from the synergistic effect of dynamic reversible noncovalent bond network with the introduction of nanoparticles in the system, the resultant hydrogel showed excellent mechanical properties. In addition, the prepared hydrogels exhibited remarkable adhesion strength (pig skin: 24 kPa) with sustainable adhesion, which still maintained an adhesion strength above 18 kPa after 20 cycles of adhesion/separation. The resultant hydrogel sensor showed a wide operating range (0-200%), high sensitivity (GF = 0.71 at 0-100% strain; GF = 3.15 at 100-200% strain), and fast response time (320 ms). The high-value utilization of renewable forest biomass resources is conducive to the sustainable development of green chemistry.
水凝胶在可穿戴传感器的柔韧性、拉伸性和导电性方面发挥着重要作用。然而，要制备出具有优异机械强度、出色自粘性和高刺激响应性的多功能水凝胶传感器，以满足实际应用的各种需求，仍然是一项挑战。在此，本工作提出了一种一锅法，通过将胺化木质素磺酸盐（A-LS）和胺化纤维素纳米晶体（A-CNC）引入水凝胶基质中来制备具有多功能的导电水凝胶。得益于体系中动态可逆非共价键网络与纳米颗粒引入的协同效应，所得水凝胶表现出优异的力学性能。此外，制备的水凝胶表现出显著的粘附强度（猪皮：24 kPa）且具有可持续粘附性，在20次粘附/分离循环后仍保持高于18 kPa的粘附强度。所得水凝胶传感器显示出较宽的工作范围（0-200%）、高灵敏度（在0-100%应变下GF = 0.71；在100-200%应变下GF = 3.15）以及快速响应时间（320 ms）。可再生森林生物质资源的高值化利用有利于绿色化学的可持续发展。
