An All‐Stretchable, Ultraviolet Protective, and Electromagnetic‐Interference‐Free E‐Textile

Abstract

Flexible and skin‐mountable electronics have drawn tremendous research attention with the booming of smart medical systems and wearing technologies, however, their environmental adaptability to electromagnetic and solar radiation has long been neglected. Herein, a novel health monitoring e‐textile with robust ultraviolet (UV) protecting and strong electromagnetic interference (EMI) shielding performance is rationally developed on an ultraelastic and bilayered nonwoven textile. Via the respective incorporation of silver flake‐modified liquid metal (AgLM) and silver nanoparticles (AgNPs) on each side of a permeable substrate, a Janus sensing layer with electrophysiological monitoring function, Joule heating ability, and excellent EMI shielding capability (up to 38.5 dB in X band) is first fabricated. Elastic microfibers embedded with sensitive photochromic microcapsules are then in situ assembled on the bioelectric‐sensing layer, achieving a bilayered e‐textile with a reversible UV‐chromic property and an extraordinary UV protection factor (UPF) of 335.56. The developed all‐stretchable and UV‐EMI proof e‐textile is utilized as a safe and comfortable on‐skin electronic to provide point‐of‐care health regulation under complex UV/EMI radiative environments. Specifically, stable Joule heating performance and accurate monitoring of electrocardiogram (ECG) and surface electromyography (sEMG) are simultaneously obtained, demonstrating promising applications in multifunctional and robust wearing electronics.

Recent advances in multifunctional electromagnetic interference shielding materials

“…With the advantages of high applicability and facile fabrication methods, multifunctional EMI shielding with heating ability based on conductive fabric or e-textile was still one of the priority selections [ [142] , [143] , [144] ]. Jia et al prepared MXene-decorated wood-pulp fabric as a multifunctional EMI shielding with a Joule heating function [ 142 ].…”

Scalable, Green, Flexible Photochromic Bacterial Cellulose for Multicolor Switching, Photo‐patterning, and Daily Sunlight UV Monitoring

“…For example, UV‐protective photochromic textiles exhibit UV‐triggered color switching and UV absorption, allowing them to resist UV radiation and protect the skin when worn. [ 12 ] Photochromic elastomer composites are also fascinating because they respond sensitively to UV radiation and self‐heal after mechanical damage. [ 13 ] However, the poor biodegradability of the substrates and experimental reagents used in manufacturing render photochromic textiles a potential threat to human skin and the environment.…”

Flexible Conformally Bioadhesive MXene Hydrogel Electronics for Machine Learning‐Facilitated Human‐Interactive Sensing

“…Moreover, the UV radiation from sunlight, mainly UV-A band (320-400 nm) and UV-B band (280-320 nm), can lead to severe health hazards to human skin, such as skin photodamage and skin photoaging. [37][38][39] However, the mostly reported hydrogel-based epidermic sensors typically displayed inferior UV-protection performance, which limits their potential health monitoring applications in UV radiation environments. Therefore, it is highly desirable to develop the high-performance conductive hydrogel-based epidermic sensors with robust self-adhesiveness for seamless conformal contact, reliable self-healing ability for extended lifetime, and excellent UVprotection function for high-quality diagnostic healthcare sensing and next-generation intelligent electronic skins.…”