The hydroxyl groups on the cellulose macromolecular chain cause the cellulose surface to have strong reactivity. In this study, 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane (PDOTES) was used to modify cellulose to improve its triboelectric properties, and a triboelectric nanogenerator (TENG) was assembled. The introduction of fluorine groups reduced the surface potential of cellulose and turned it into a negative phase, which enhanced the ability to capture electrons. The electrical properties increased by 30% compared with unmodified cellulose. According to the principles of TENGs, a self-powered human-wearable device was designed using PDOTES-paper, which could detect movements of the human body, such as walking and running, and facilitated a practical method for the preparation of efficient wearable sensors.

Triboelectric nanogenerators (TENGs) have garnered considerable attention as an emerging energy harvesting technology. To improve the electrical properties of the frictional materials in TENGs, various micro- and nanomaterials with strong...

Cellulose-based triboelectric nanogenerators (TENGs) can provide power for various monitoring devices and are environmentally friendly and sustainable. Chemical functional modi cation is a common method to improve the electrical output performance of cellulose-based TENGs. In this work, an environmentally friendly high-performance triboelectric nanogenerator based on polydopamine/cellulose nano brils (PDA/CNF) composite membrane and uorinated ethylene propylene (FEP) was developed. Dopamine generates polydopamine nanoparticles through oxidative self-polymerization and adheres to the surface of nano bers. The synergistic effect of amino group introduction and membrane surface microstructure has effectively enhanced the output performance of TENG to a certain extent.The effects of contentration of PDA, thickness of CNF composite lm and different working conditions on the electrical output were systematically investigated.The optimized PDA/CNF-TENG exhibited an enhanced electrical output performance with the voltage, current, and power density values of ≈ 205 V, ≈ 20 µA, and ≈ 56.25 µW•cm − 2 , respectively. The PDA/CNF-TENG exhibited stable and identi able signals when used as a selfpowered sensor for human motion monitoring, showing the potential prospects of cellulose materials for TENG and other electronic applications.

As a green material, cellulose is widely used in friction triboelectric nanogenerators (TENGs). However, the weak polarity of the cellulose surface leads to its weak contact electrification performance, which is not conducive to its utilization in TENGs. In this study, epoxy chloropropane and ethylenediamine were grafted onto cellulose to form paper and were assembled with an FEP film. The output voltage, current, and surface charge density were 34.9%, 26.7%, and 16.7% higher than those of ordinary paper, respectively. When 20% nano TiO2 filler was added to the paper made from amino-modified cellulose, the output voltage, current, and surface charge density of the TENG increased by 70.9%, 226.7%, and 122.2%, respectively, compared with ordinary paper. As the air humidity of the TENG increased from 60% to 90%, the output voltage, current, and surface charge density were maintained at 53.7%, 38.9%, and 61.0%, respectively. When a 5 × 107 Ω resistor was connected to the working circuit, its output power reached 13.78 μ W·cm2. This showed that cellulose as a green material has wide application prospects in the field of TENG.

No abstract

Cellulose-based triboelectric nanogenerators (TENGs) can provide power for various monitoring devices and are environmentally friendly and sustainable. Chemical functional modification is a common method to improve the electrical output performance of cellulose-based TENGs. In this work, an environmentally friendly high-performance triboelectric nanogenerator based on polydopamine/cellulose nanofibrils (PDA/CNF) composite membrane and fluorinated ethylene propylene (FEP) was developed. Dopamine generates polydopamine nanoparticles through oxidative self-polymerization and adheres to the surface of nanofibers. The synergistic effect of amino group introduction and membrane surface microstructure has effectively enhanced the output performance of TENG to a certain extent.The effects of contentration of PDA, thickness of CNF composite film and different working conditions on the electrical output were systematically investigated.The optimized PDA/CNF-TENG exhibited an enhanced electrical output performance with the voltage, current, and power density values of ≈ 205 V, ≈ 20 µA, and ≈ 56.25 µW·cm− 2, respectively. The PDA/CNF-TENG exhibited stable and identifiable signals when used as a self-powered sensor for human motion monitoring, showing the potential prospects of cellulose materials for TENG and other electronic applications.