Quasi‐Homogeneous and Hierarchical Electronic Textiles with Porosity‐Hydrophilicity Dual‐Gradient for Unidirectional Sweat Transport, Electrophysiological Monitoring, and Body‐Temperature Visualization

Author:

Dong Jiancheng1,Peng Yidong1,Wang Dan1,Li Le1,Zhang Chao2,Lai Feili34,He Guanjie5,Zhao Xu6,Yan Xiu‐Ping6,Ma Piming1,Hofkens Johan34,Huang Yunpeng1ORCID,Liu Tianxi1

Affiliation:

1. Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University Wuxi 214122 China

2. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China

3. Department of Chemistry KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium

4. Department of Molecular Spectroscopy Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany

5. Christopher Ingold Laboratory Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ UK

6. School of Food Science and Technology Jiangnan University Wuxi 214122 China

Abstract

AbstractOn‐skin electronics based on impermeable elastomers and stacking structures often suffer from inferior sweat‐repelling capabilities and severe mechanical mismatch between sub‐layers employed, which significantly impedes their lengthy wearing comfort and functionality. Herein, inspired by the transpiration system of vascular plants and the water diode phenomenon, a hierarchical nonwoven electronic textile (E‐textile) with multi‐branching microfibers and robust interlayer adhesion is rationally developed. The layer‐by‐layer electro‐airflow spinning method and selective oxygen plasma treatment are utilized to yield a porosity‐hydrophilicity dual‐gradient. The resulting E‐textile shows unidirectional, nonreversible, and anti‐gravity water transporting performance even upon large‐scale stretching (250%), excellent mechanical matching between sub‐layers, as well as a reversible color‐switching ability to visualize body temperature. More importantly, the conducting and skin‐conformal E‐textile demonstrates accurate and stable detecting capability for biomechanical and bioelectrical signals when applied as an on‐skin bioelectrode, including different human activities, electrocardiography, electromyogram, and electrodermal activity signals. Further, the E‐textile can be efficiently implemented in human‐machine interfaces to build a gesture‐controlled dustbin and a smart acousto‐optic alarm. Hence, this hierarchically‐designed E‐textile with integrated functionalities offers a practical and innovative method for designing comfortable and daily applicable on‐skin electronics.

Funder

National Natural Science Foundation of China

Fonds Wetenschappelijk Onderzoek

China Postdoctoral Science Foundation

Natural Science Foundation of Jiangsu Province

Program of Shanghai Academic Research Leader

Postdoctoral Research Foundation of China

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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