Liu Chao, Li Yu, Zhuang Jingshun, Xiang Zhouyang, Jiang Weikun, He Shuaiming, Xiao Huining
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China.
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Polymers (Basel). 2022 Sep 7;14(18):3739. doi: 10.3390/polym14183739.
The development of green materials, especially the preparation of high-performance conductive hydrogels from biodegradable biomass materials, is of great importance and has received worldwide attention. As an aromatic polymer found in many natural biomass resources, lignin has the advantage of being renewable, biodegradable, non-toxic, widely available, and inexpensive. The unique physicochemical properties of lignin, such as the presence of hydroxyl, carboxyl, and sulfonate groups, make it promising for use in composite conductive hydrogels. In this review, the source, structure, and reaction characteristics of industrial lignin are provided. Description of the preparation method (physical and chemical strategies) of lignin-based conductive hydrogel is elaborated along with their several important properties, such as electrical conductivity, mechanical properties, and porous structure. Furthermore, we provide insights into the latest research advances in industrial lignin conductive hydrogels, including biosensors, strain sensors, flexible energy storage devices, and other emerging applications. Finally, the prospects and challenges for the development of lignin-conductive hydrogels are presented.
绿色材料的发展，尤其是利用可生物降解的生物质材料制备高性能导电水凝胶，具有重要意义并受到了全球关注。作为一种存在于许多天然生物质资源中的芳香族聚合物，木质素具有可再生、可生物降解、无毒、来源广泛且价格低廉的优点。木质素独特的物理化学性质，如存在羟基、羧基和磺酸基团，使其在复合导电水凝胶的应用中具有潜力。在这篇综述中，介绍了工业木质素的来源、结构和反应特性。阐述了木质素基导电水凝胶的制备方法（物理和化学策略）以及它们的几个重要性质，如电导率、机械性能和多孔结构。此外，我们还深入探讨了工业木质素导电水凝胶的最新研究进展，包括生物传感器、应变传感器、柔性储能装置及其他新兴应用。最后，提出了木质素导电水凝胶发展的前景和挑战。
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