Green Flexible Triboelectric Nanogenerators Based on Edible Proteins for Electrophoretic Deposition

Abstract

The next generation of wearable electronics for internet of things (IoT) systems, and green energy harvesting require electrically conductive materials with high flexibility, conductivity, and being environmentally friendly. In this study, three biopolymers, cow's milk, soy milk, and egg white liquid, are investigated and compared as spin‐coated positive layers in triboelectric nanogenerators (TENGs). Superior results are obtained using egg white liquid as a novel liquid conductor with comparable conductivity and high transparency. After investigating various disposable polymers as substrates, sandpaper is used to improve the output performance of the proposed egg white liquid based TENG (EW‐TENG). The maximum output power density, voltage, and current of the EW‐TENG are 328.84 mW cm−2, 1720 V, and 16.05 mA, respectively. The fabricated EW‐TENG, with an area of 4 × 4 cm2, can directly illuminate 55 high‐power blue LEDs and can adequately perform an electrophoretic deposition of ZnO nanoparticles on copper layers without microcracks. The potential distribution of the EW‐TENG obtained by COMSOL Multiphysics software is consistent with the experimental results. Herein, an eco‐environmentally friendly, flexible, and lightweight electronic device for energy harvesting and electrophoretic deposition applications is proposed.

Deep‐Learning‐Assisted Neck Motion Monitoring System Self‐Powered Through Biodegradable Triboelectric Sensors

“…Corn bract leaves, with a smooth front surface and a rough rear surface (Figure S1, Supporting Information), have proven to be excellent positive friction materials for TENG applications in smart monitoring and energy harvesting. [56,57] In this work, a simple, effective, and low-cost method is used to assemble vertical contact separation mode TENG using a clean and flat corn bract leaf selected as a direct dielectric friction layer. The NB-TENGs harvest energy and monitor motion as sensors.…”

Advances in Ultrathin Soft Sensors, Integrated Materials, and Manufacturing Technologies for Enhanced Monitoring of Human Physiological Signals

“…[51] Triboelectric sensors have the advantages of low cost, simple structure, easy to access, diverse material option, and high conversion efficiency. [52] In addition, triboelectric sensors have potential in both sensing and wearable power supply, making it a promising candidate for the enhanced monitoring of human physiological signals. When driven by a low-pressure stimulus, electrostatic self-powered pressure sensors, including triboelectric sensors and electret/piezoelectric sensors, can generate higher voltages than piezoelectric self-powered pressure sensors.…”

Sustainable and photoresponse triboelectric nanogenerators based on 2D-gC3N4 and agricultural wastes

“…5a. Polyethylene tape was used as a substrate in the opposing layer in both fabricated TENGs as an intermediate layer to extend charge decay time [50,52]. According to Fig.…”