Chen Tingjie, Liu Zhiyong, Zhao Gang, Qin Zipeng, Zheng Peitao, Aladejana John Tosin, Tang Zhendong, Weng Mingcen, Peng Xiangfang, Chang Jian
College of Materials Science and Engineering, Key Laboratory of Polymer Materials and Products of Universities in Fujian, Fujian University of Technology, Fuzhou 350002, Fujian, China.
College of Material Science and Engineering, National Forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China.
ACS Appl Mater Interfaces. 2022 Nov 16;14(45):51361-51372. doi: 10.1021/acsami.2c15922. Epub 2022 Nov 6.
Sustainable biomass materials are promising for low-cost wearable piezoresistive pressure sensors, but these devices are still produced with time-consuming manufacturing processes and normally display low sensitivity and poor mechanical stability at low-pressure regimes. Here, an aqueous MXene ink obtained by simply ball-milling is developed as a conductive modifier to fabricate the multiresponsive bidirectional bending actuator and compressible MXene-plant fiber sponge (MX-PFS) for durable and wearable pressure sensors. The MX-PFS is fabricated by physically foaming MXene ink and plant fibers. It possesses a lamellar porous structure composed of one-dimensional (1D) MXene-coated plant fibers and two-dimensional (2D) MXene nanosheets, which significantly improves the compression capacity and elasticity. Consequently, the encapsulated piezoresistive sensor (PRS) exhibits large compressible strain (60%), excellent mechanical durability (10 000 cycles), low detection limit (20 Pa), high sensitivity (435.06 kPa), and rapid response time (40 ms) for practical wearable applications.
可持续生物质材料对于低成本可穿戴压阻式压力传感器很有前景，但这些器件仍采用耗时的制造工艺生产，并且在低压状态下通常表现出低灵敏度和较差的机械稳定性。在此，通过简单球磨获得的水性MXene墨水被开发为一种导电改性剂，用于制造用于耐用且可穿戴压力传感器的多响应双向弯曲致动器和可压缩的MXene-植物纤维海绵（MX-PFS）。MX-PFS是通过对MXene墨水和植物纤维进行物理发泡制成的。它具有由一维（1D）MXene包覆的植物纤维和二维（2D）MXene纳米片组成的层状多孔结构，这显著提高了压缩能力和弹性。因此，封装的压阻式传感器（PRS）展现出大的可压缩应变（60%）、出色的机械耐久性（10000次循环）、低检测限（20 Pa）、高灵敏度（435.06 kPa）以及适用于实际可穿戴应用的快速响应时间（40 ms）。
