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- Title
A multistimuli‐responsive recyclable poly(vinyl alcohol)/perylene imide hydrogel of high‐performance piezoresistive sensors for human wearable devices.
- Authors
Ji, Ao; Luo, Xingqi; Yang, Xinguo
- Abstract
Multiple factors stimulate human beings in their daily lives, but uniformly collecting these signals is challenging. This study proposes a physically cross‐linked method that employs hydrogen bonding interactions to prepare poly(vinyl alcohol)/perylene imide (PVA/PI) hydrogels. The prepared PVA/PI hydrogels demonstrate favorable compressive strength (45–75 kPa) and adhesion properties. At room temperature, elongation reaches approximately 400%. Additionally, the PVA/PI hydrogels exhibit strong mechanical properties, with a maximum elongation of 200%, and high ionic‐electronic conductivity of 29.6 S m−1, even after being soaked in a 2 M HCl solution for 24 h. The water‐soluble PI in the PVA/PI hydrogels is environmentally responsive, resulting in a current response time of 100 ms under 365 nm irradiation, as well as reversible fluorescence changes across different pH levels. Both the PVA5/PI1 and PVA5/PI1/HCl2 (the concentrations were 5 wt%, 1 mg mL−1 and 2 mol L−1, respectively) hydrogels demonstrate high sensitivity (0.49 and 7.88 kPa−1) and a wide pressure monitoring range (0.088–30.67 kPa and 0.088–18.67 kPa, respectively) as pressure sensors. The first developed recyclable PVA/PI hydrogel shows promise for use in wearable sensing devices and is expected to be applied in complex environments.
- Subjects
PERYLENE; HYDROGELS; HYDROGEN bonding interactions; WEARABLE technology; PRESSURE sensors; COMPRESSIVE strength
- Publication
Journal of Applied Polymer Science, 2024, Vol 141, Issue 27, p1
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.55595