Polyvinyl alcohol modified plant fiber hydrogel pressure and strain dual-model sensors for biomedical signal detection

IF 21.8 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Advanced Composites and Hybrid Materials Pub Date : 2025-03-21 DOI:10.1007/s42114-024-01165-1

Zhiheng Gu, Ruikang Ma, Xia Chen, Zhaoxing Lin, Yu Yang, Bin Tan, Jiaji Sun, Tingjie Chen

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Abstract

Flexible and stretchable hydrogels have become promising materials for wearable biomedical devices used in continuous health monitoring. A simple and effective ball-milling method is proposed to create conductive, biocompatible polyvinyl alcohol (PVA) hydrogels modified with plant fibers and carbon nanotubes (CNTs) for dual-model wearable devices. The plant fibers and CNTs disperse within the PVA network, providing excellent stretchability (up to 4200% tensile strain), self-healing, and conductivity. These hydrogels can be used for assembling and repairing electrical circuits and serve as sensing elastomers for capacitive strain sensors with high sensitivity, durability, and wide strain range. After high temperature treatment, a conductive and compressible porous PVA/PF@CNT sponge can be obtained from PVA/PF@CNT hydrogel, which can be assembled as piezoresistive pressure sensors with a sensitivity of 0.89 kPa⁻¹. These sensors enable real-time monitoring of human biological signals, including joint movements, facial expressions, and throat activity.

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用于生物医学信号检测的聚乙烯醇改性植物纤维水凝胶压力和应变双模传感器

柔性和可拉伸的水凝胶已成为用于连续健康监测的可穿戴生物医学设备的有前途的材料。提出了一种简单有效的球磨方法来制备导电的、生物相容性的聚乙烯醇（PVA）水凝胶，该凝胶由植物纤维和碳纳米管（CNTs）修饰，用于双模型可穿戴设备。植物纤维和碳纳米管分散在PVA网络中，提供优异的拉伸性（高达4200%的拉伸应变）、自愈性和导电性。这些水凝胶可用于组装和修复电路，并作为具有高灵敏度，耐用性和宽应变范围的电容应变传感器的传感弹性体。PVA/PF@CNT水凝胶经高温处理后，可得到导电可压缩的多孔PVA/PF@CNT海绵，可组装成压阻式压力传感器，灵敏度为0.89 kPa−1。这些传感器能够实时监测人体生物信号，包括关节运动、面部表情和喉咙活动。

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来源期刊

Advanced Composites and Hybrid Materials Multiple-

CiteScore

26.00

自引率

21.40%

发文量

185

期刊介绍： Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.