Version 2 2024-02-16, 17:07Version 2 2024-02-16, 17:07
Version 1 2024-02-15, 19:34Version 1 2024-02-15, 19:34
journal contribution
posted on 2024-02-16, 17:07authored byJun Hu, Jiangping Guo, Junyan Zhao, Zixun Chen, Mulenga Kalulu, Gaojian Chen, Guodong Fu
The present zwitterionic hydrogel-based wearable sensor
exhibits
various limitations, such as limited degradation capacity, unavoidable
toxicity resulting from initiators, and poor mechanical properties
that cannot satisfy practical demands. Herein, we present an initiator
and crosslinker-free approach to prepare polyethylene glycol (PEG)@poly[2-(methacryloyloxy)ethyl]
dimethyl-(3-sulfopropyl) (PSBMA) interpenetrating polymer network
(IPN) hydrogels that are self-polymerized via sunlight-induced and
non-covalent crosslinking through electrostatic interaction and hydrogen
bonding among polymer chains. The PEG@PSBMA IPN hydrogel possesses
tissue-like softness, superior stretchability (∼2344.6% elongation),
enhanced fracture strength (∼39.5 kPa), excellent biocompatibility,
antibacterial property, reliable adhesion, and ionic conductivity.
Furthermore, the sensor based on the IPN hydrogel demonstrates good
sensitivity and cyclic stability, enabling effective real-time monitoring
of human body activities. Moreover, it is worth noting that the excellent
degradability in the saline solution within 8 h makes the prepared
hydrogel-based wearable sensor free from the electronic device contamination.
We believe that the proposed strategy for preparing physical zwitterionic
hydrogels will pave the way for fabricating eco-friendly wearable
devices.