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- Title
Ultrafast Polymerization of a Self-Adhesive and Strain Sensitive Hydrogel-Based Flexible Sensor for Human Motion Monitoring and Handwriting Recognition.
- Authors
Du, Bin; Yin, Mengwei; Yang, Kenan; Wang, Sainan; Pei, Yiting; Luo, Rubai; Zhou, Shisheng; Li, Huailin
- Abstract
Hydrogel-based flexible electronic devices have great potential in human motion monitoring, electronic skins, and human-computer interaction applications; hence, the efficient preparation of highly sensitive hydrogel-based flexible sensors is important. In the present work, the ultrafast polymerization of a hydrogel (1–3 min) was achieved by constructing a tannic acid (TA)-Fe3+ dynamic redox system, which endowed the hydrogel with good adhesion performance (the adhesion strength in wood was 17.646 kPa). In addition, the uniform dispersal ensured by incorporating polydopamine-decorated polypyrrole (PPy@PDA) into the hydrogel matrix significantly improved the hydrogel's stretching ability (575.082%). The as-prepared PAM/CS/PPy@PDA/TA hydrogel-based flexible sensor had a high-fidelity low detection limit (strain = 1%), high sensitivity at small strains (GF = 5.311 at strain = 0–8%), and fast response time (0.33 s) and recovery time (0.25 s), and it was reliably applied to accurate human motion monitoring and handwriting recognition. The PAM/CS/PPy@PDA/TA hydrogel opens new horizons for wearable electronic devices, electronic skins, and human-computer interaction applications.
- Subjects
TANNINS; MOTION detectors; ELECTRONIC equipment; OXIDATION-reduction reaction; HUMAN-computer interaction; HANDWRITING; POLYMERIZATION; WOOD chemistry
- Publication
Polymers (20734360), 2024, Vol 16, Issue 11, p1595
- ISSN
2073-4360
- Publication type
Article
- DOI
10.3390/polym16111595