Fabrication and Application of Highly Stretchable Conductive Fiber‐Based Electrode of Epoxy/NBR Electrospun Fibers Spray‐Coated with AgNW/PU Composites

Abstract

Stretchable fiber‐based electrodes are highly desired for the applications of wearable electronics owing to their good durability, excellent deformability, and easy attachment onto a curved surface in comparison with thin film electrodes. However, it is a critical challenge to fabricate a fiber‐based electrodes with low surface roughness and high conductivity under a large mechanical strain. In this study, the fabrication of stretchable and conductive epoxy/NBR‐20 fiber, spray‐coated with silver nanowire/waterborne polyurethane composite, is demonstrated via the combination of electrospinning and spray‐coating techniques. Such a fiber‐based electrode can maintain low resistance (less than 150 Ω) by stretching up to 40% strain and sustain at 30% strain for 200 stretch/release cycles. The deformable conductive fibers can serve as a promising fiber‐based bottom electrode for resistive memory devices and show volatile DRAM characteristics with an ON/OFF memory ratio of 102.

Core–Sheath Stretchable Conductive Fibers for Safe Underwater Wearable Electronics

“…Thus, 300% prestrain was an optimized parameter and without further specification, our CSCF is formed at this prestrain. As shown in Figure c, CSCF exhibited a superior stable core conductivity upon stretching (ΔR/ R 0 ≈ 0.1 at 100% strain) which is among the best overall performance of stretchable conductive fiber reported so far (Figure f) . The fatigue resistance is also key to the cyclic use for wearable electronics.…”

An electrically stable and mechanically robust stretchable fiber conductor prepared by dip-coating silver nanowires on porous elastomer yarn

“…This level of electrical stability has surpassed most of the yet reported stretchable fiber conductors with AgNWs as the conductive reagent (Table 1). 51–53,55,56,58–60 The AgNWs@pSBS-20-8 fiber could bear 8000 cycles of stretching with only 1% resistance increase at a strain of 10% or with a 2.5 fold resistance increase at a strain of 30%, while the nonporous fiber could only bear 500 cycles of stretching at a strain of 30% with ∼18 500 fold resistance increase. When the stretching strain was increased to 60%, the AgNWs@pSBS-20-8 fiber could still bear 8000 cycles of stretching with less than 50 fold resistance increase (Fig.…”

Recent Progress in Conducting Polymer Composite/Nanofiber-Based Strain and Pressure Sensors

“…Pressure sensors have been developed into a multidisciplinary field of research, as they interconnect material synthesis, processing, fabrication, system engineering, and signal acquisition, including new technological upgrades such as artificial intelligence and the internet of thing [58][59][60]. Recent trends and a good deal of research interests have evolved with the active involvement of metallic nanostructures, metallic hybrids, carbonaceous material-based sensing, etc., [61][62][63]. Conducting polymer and its composite-based pressure sensors, including healthcare, electronic skin, artificial prosthesis, and human-machine interface, are presented, along with successful achievements in terms of improving the sensitivity, sensing range, and hysteresis reduction.…”