Asymmetrically Patterned Cellulose Nanofibers/Graphene Oxide Composite Film for Humidity Sensing and Moist-Induced Electricity Generation

• DOI: 10.1021/acsami.0c17970
• Publication Date: 2020-12-01T05:08:42Z
• Authors: Zixiu Li; Jian Wang; Lei Dai; Xuhui Sun; Meng An; Chao Duan; Ji Li; Yonghao Ni
• Keywords: Electrospinning

The exploration of advanced functional materials from natural resources is significantly important to green and sustainable development. Herein, we design an ultrafast humidity-driven bending response system using asymmetrically patterned cellulose nanofiber (CNF)/graphene oxide (GO) composite films. CNF/GO films are fabricated by vacuum-assisted filtration, followed a surface imprinting technique. results reveal that the possess excellent linear humidity change cycle stability in relative (RH) range 25 85%. curvature film varies 0.012 0.260 cm-1 as RH changes 85%, time only 3-5 s. outstanding attributed addition GO actively interacts with water, enhancing flexibility sensitivity In addition, asymmetrical patterning improves water transfer rate confinement renders easy deformation under same stress. Molecular dynamics simulation finite element analysis used further elucidate mechanism therein. Furthermore, this also effective hygroelectric generator, output voltage high 286 mV. This smart responsive shows potential applications biomimetic leaf, proximity sensor, moisture-driven electricity generator. work inspires new approach material nanocellulose promotes their applications.