期刊
JOURNAL OF MATERIALS CHEMISTRY B
卷 11, 期 31, 页码 7478-7489出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3tb00495c
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The development prospects of ionohydrogels with excellent mechanical properties and high sensitivity are necessary due to the rapid development of multi-functional flexible wearable sensors. A novel waterborne polyurethane (WPU) micelle with reactive groups on the surface has been prepared as a crosslinker, and then reacted with polyacrylamide (PAM) to obtain a polyacrylamide-polyurethane/ionic liquid (PAM-WPU/IL) ionohydrogel. The ionohydrogel exhibited ultrastretchability, good mechanical resilience, and excellent self-adhesion strength, and could be used as a strain sensor for monitoring human movement with high strain sensitivity.
Due to the rapid development of multi-functional flexible wearable sensors, the development prospects of ionohydrogels with excellent mechanical properties and high sensitivity are necessary. In this work, a novel waterborne polyurethane (WPU) micelle with reactive groups on the surface has been prepared as a crosslinker and then reacted with polyacrylamide (PAM) to obtain a polyacrylamide-polyurethane/ionic liquid (PAM-WPU/IL) ionohydrogel. With the aid of ion-dipole interaction and crosslinks in the composite, the ionohydrogel exhibited ultrastretchability (up to 2927%), good mechanical resilience, and excellent self-adhesion strength (46.01 kPa). Furthermore, the ionohydrogel was used as a strain sensor for monitoring human movement with high strain sensitivity (gauge factor = 35). It is believed that this study provides a new idea for designing a multifunctional ionohydrogel for use in wearable electronics.
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