Affiliation:
1. School of Advanced Materials Peking University Shenzhen Graduate School Peking University Shenzhen 518055 China
2. State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan 430072 China
3. Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 China
4. Department of Chemistry and Centre for Processable Electronics Imperial College London London W12 0BZ UK
Abstract
AbstractHydrogels have entered the spotlight for applications in soft electronics. It is essential and challenging to obtain hydrogels that can function properly under varying environmental circumstances, that is, 30–90% relative humidity (RH) and −20 to 40 °C due to their intrinsic nature to lose and absorb water upon variations in humidity and temperature. In this work, a green solvent, solketal, is introduced into poly 3‐dimethyl‐2‐(2‐methylprop‐2‐enoyloxy)ethyl azaniumyl propane‐1‐sulfonate (poly(DMAPS)) zwitterionic hydrogels. Compared to glycerol, solketal endows hydrogels with greater possibility for further modification as well as improved water content and mechanical performance consistency over 30–90% RH. Encouragingly, the optimized hydrogel demonstrates its unique merits as a dielectric layer in iontronic sensors, featuring non‐leaky ions, high sensitivity (1100 kPa−1), wide humidity, and temperature range applicability. A wide‐humidity range healable and stretchable electrode is attained by combining the hydrogel substrate with Ag paste. A full‐device healable and highly‐sensitive sensor is developed. This study is a pioneering work that tackles the broad humidity range applicability issue of hydrogels, and demonstrates the ion‐leakage‐free ionic skins with zwitterionic dielectrics. The outcomes of the study will considerably promote advancements in the fields of hydrogel electronics and iontronic sensors.
Funder
National Natural Science Foundation of China
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
15 articles.
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