Gu Xiaochun, Cheng Haoge, Lu Xinyi, Li Rui, Ouyang Xiao, Ma Ning, Zhang Xinyue
Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, 266000, China.
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China.
Chem Asian J. 2023 Sep 15;18(18):e202300483. doi: 10.1002/asia.202300483. Epub 2023 Aug 8.
Flexible sensors show great application potential in wearable electronics, human-computer interaction, medical health, bionic electronic skin and other fields. Compared with rigid sensors, hydrogel-based devices are more flexible and biocompatible and can easily fit the skin or be implanted into the body, making them more advantageous in the field of flexible electronics. In all designs, polyvinyl alcohol (PVA) series hydrogels exhibit high mechanical strength, excellent sensitivity and fatigue resistance, which make them promising candidates for flexible electronic sensing devices. This paper has reviewed the latest progress of PVA/plant-based biomass hydrogels in the construction of flexible sensor applications. We first briefly introduced representative plant biomass materials, including sodium alginate, phytic acid, starch, cellulose and lignin, and summarized their unique physical and chemical properties. After that, the design principles and performance indicators of hydrogel sensors are highlighted, and representative examples of PVA/plant-based biomass hydrogel applications in wearable electronics are illustrated. Finally, the future research is briefly prospected. We hope it can promote the research of novel green flexible sensors based on PVA/biomass hydrogel.
柔性传感器在可穿戴电子设备、人机交互、医疗健康、仿生电子皮肤等领域展现出巨大的应用潜力。与刚性传感器相比，基于水凝胶的器件更加灵活且具有生物相容性，能够轻松贴合皮肤或植入体内，这使得它们在柔性电子领域更具优势。在所有设计中，聚乙烯醇（PVA）系列水凝胶表现出高机械强度、优异的灵敏度和抗疲劳性，这使其成为柔性电子传感设备的有前景的候选材料。本文综述了PVA/植物基生物质水凝胶在柔性传感器应用构建方面的最新进展。我们首先简要介绍了代表性的植物生物质材料，包括海藻酸钠、植酸、淀粉、纤维素和木质素，并总结了它们独特的物理和化学性质。之后，突出了水凝胶传感器的设计原理和性能指标，并举例说明了PVA/植物基生物质水凝胶在可穿戴电子设备中的应用。最后，对未来研究进行了简要展望。我们希望它能推动基于PVA/生物质水凝胶的新型绿色柔性传感器的研究。
