Constructing the\n3D Interconnected Conductive MXene-Cellulose\nScaffold to Boosting the Piezoresistive Sensing Capability

Flexible pressure sensors play a vital role in advancing\nwearable\nelectronics by enabling precise health monitoring, human-machine interfaces,\nand environmental sensing. MXene-based piezoresistive sensors have\ngarnered significant attention due to their exceptional electromechanical\nproperties. However, enhancing their performance and ensuring environmental\nsustainability simultaneously still remain critical challenge. In\nthis study, we prepared hydroxyl-rich deacetylated cellulose acetate\n(DCA) fibers and attached MXene to the surface to form a three-dimensionally\ninterconnected conductive network. Taking advantage of the typical\nmicromorphology and in turn the high electrical conductivity modulation,\nthe resulting MXene/DCA (MDCA) flexible sensors exhibited exceptionally\nhigh sensitivity (54.62 kPa<sup>–1</sup>), excellent linearity\nin the range of 0–40 kPa (<i>R</i><sup>2</sup> =\n0.998), fast response/recovery time (154/125 ms), and outstanding\nlong-term durability over 10 000 compression cycles at 12.37\nkPa without significant degradation. This study offers promising insights\ninto the development of high-performance, environmentally friendly\npiezoresistive sensors.