Emerging Trends of Nanofibrous Piezoelectric and Triboelectric Applications: Mechanisms, Electroactive Materials, and Designed Architectures

Abstract

Over the past few decades, significant progress in piezo‐/tribo‐electric nanogenerators (PTEGs) has led to the development of cutting‐edge wearable technologies. Nanofibers with good designability, controllable morphologies, large specific areas, and unique physicochemical properties provide a promising platform for PTEGs for various advanced applications. However, the further development of nanofiber‐based PTEGs is limited by technical difficulties, ranging from materials design to device integration. Herein, we systematically review the current developments in PTEGs based on electrospun nanofibers. The review begins with the mechanisms of PTEGs and the advantages of nanofibers and nanodevices, including high breathability, waterproofness, scalability, and thermal–moisture comfort. In terms of materials and structural design, novel electroactive nanofibers and structure assemblies based on one‐dimensional micro/nanostructures, two‐dimensional bionic structures, and three‐dimensional multilayered structures are discussed. Subsequently, nanofibrous PTEGs in applications such as energy harvesters, personalized medicine, personal protective equipment, and human‐machine interactions are summarized. Nanofiber‐based PTEGs still face many challenges such as energy efficiency, material durability, device stability, and device integration. In the final section of this review, the research gap between research and practical applications of PTEGs is discussed, and emerging trends are proposed, providing some ideas for the development of intelligent wearables.This article is protected by copyright. All rights reserved

Extreme Orientation of Stereocomplexed Poly(lactic acid) Induced Ultrafine Electroactive Nanofibers for Respiratory Healthcare and Intelligent Diagnosis

“…The highly electroactive and oriented PLA nanofibers endowed with excellent TENG mechanism, which have significant potential for efficient PM removal through charge regeneration to enhance electrostatic adsorption (Figure 4d). 53,54 Under the humanoid respiratory vibration of 85 L/ min and a RH of 90% ± 5%, the PM 0.3 removal efficiencies of TENG air filters and the normal PLA membrane filters are described in Figures 4e and S10. The removal efficiency of the TENG air filters showed a great improvement compared to the normal PLA membrane filters, especially the removal efficiency of the OSC-30-based TENG air filter (95.02%) was increased by nearly 10% compared to that of the OSC-30 filter (86.42%).…”