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Strong and Multifunctional Lignin/Liquid Metal Hydrogel Composite as Flexible Strain Sensors
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2024-04-19 , DOI: 10.1021/acssuschemeng.4c00940 Jing Luo 1 , Yaxin Hu 1 , Shipeng Luo 1 , Xinran Wang 1 , Shuhao Chen 1 , Manying Zhang 1 , Jie Jiang 1 , Liyang Liu 2, 3 , Hengfei Qin 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2024-04-19 , DOI: 10.1021/acssuschemeng.4c00940 Jing Luo 1 , Yaxin Hu 1 , Shipeng Luo 1 , Xinran Wang 1 , Shuhao Chen 1 , Manying Zhang 1 , Jie Jiang 1 , Liyang Liu 2, 3 , Hengfei Qin 1
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Conductive hydrogel is a promising material for flexible sensors due to its good electrical conductivity, adhesion, and high sensitivity. However, the challenge of integrating conductive fillers like liquid metals lies in their poor interface compatibility, which adversely affects their mechanical strength and lifespan. Addressing the challenge of achieving both mechanical strength and conductivity, this study harnessed 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO)-oxidized lignin to form a stable interface between the liquid metal (LM) and the hydrogel system. Furthermore, this innovation (lignin-LM) facilitates the free radical polymerization of acrylic acid (PAA) at room temperature, resulting in conductive hydrogels. These hydrogels demonstrated excellent self-healing, adhesive, tensile, and antibacterial properties, alongside high strain sensing accuracy and stable electrical output in flexible sensor applications. In conclusion, the PAA-Lignin-LM hydrogel holds excellent promise for wearable, flexible electronic products, introducing a novel approach for the high-value utilization of lignin.
中文翻译：
坚固且多功能的木质素/液态金属水凝胶复合材料作为柔性应变传感器
导电水凝胶具有良好的导电性、附着力和高灵敏度，是一种很有前景的柔性传感器材料。然而，集成液态金属等导电填料的挑战在于它们的界面相容性差，这对其机械强度和寿命产生不利影响。为了解决同时实现机械强度和导电性的挑战，本研究利用 2,2,6,6-四甲基哌啶-1-氧基 (TEMPO) 氧化木质素在液态金属 (LM) 和水凝胶系统之间形成稳定的界面。此外，这项创新（木质素-LM）促进了丙烯酸（PAA）在室温下的自由基聚合，从而产生导电水凝胶。这些水凝胶在柔性传感器应用中表现出优异的自愈、粘合、拉伸和抗菌性能，以及高应变传感精度和稳定的电输出。总之，PAA -木质素- LM 水凝胶对于可穿戴、柔性电子产品具有良好的前景，为木质素的高价值利用引入了一种新方法。
更新日期：2024-04-19
中文翻译：
坚固且多功能的木质素/液态金属水凝胶复合材料作为柔性应变传感器
导电水凝胶具有良好的导电性、附着力和高灵敏度，是一种很有前景的柔性传感器材料。然而，集成液态金属等导电填料的挑战在于它们的界面相容性差，这对其机械强度和寿命产生不利影响。为了解决同时实现机械强度和导电性的挑战，本研究利用 2,2,6,6-四甲基哌啶-1-氧基 (TEMPO) 氧化木质素在液态金属 (LM) 和水凝胶系统之间形成稳定的界面。此外，这项创新（木质素-LM）促进了丙烯酸（PAA）在室温下的自由基聚合，从而产生导电水凝胶。这些水凝胶在柔性传感器应用中表现出优异的自愈、粘合、拉伸和抗菌性能，以及高应变传感精度和稳定的电输出。总之，PAA -木质素- LM 水凝胶对于可穿戴、柔性电子产品具有良好的前景，为木质素的高价值利用引入了一种新方法。
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