Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/76198
Title: Preparation and property evaluation of conductive hydrogel using poly (Vinyl alcohol)/Polyethylene glycol/Graphene oxide for human electrocardiogram acquisition
Authors: Xiao, XL
Wu, GZ
Zhou, HT
Qian, K
Hu, JL 
Keywords: Cyclic freezing-thawing method
Conductive polymeric hydrogel
Mechanical performance
Electrocardiogram signal
Issue Date: 2017
Publisher: Molecular Diversity Preservation International (MDPI)
Source: Polymers, 2017, v. 9, no. 7, 259 How to cite?
Journal: Polymers 
Abstract: Conductive hydrogel combined with Ag/AgCl electrode is widely used in the acquisition of bio-signals. However, the high adhesiveness of current commercial hydrogel causes human skin allergies and pruritus easily after wearing hydrogel for electrodes for a long time. In this paper, a novel conductive hydrogel with good mechanical and conductive performance was prepared using polyvinyl alcohol (PVA), polyethylene glycol (PEG), and graphene oxide (GO) nanoparticles. A cyclic freezing-thawing method was employed under processing conditions of -40 degrees C (8 h) and 20 degrees C (4 h) separately for three cycles in sequence until a strong conductive hydrogel, namely, PVA/PEG/GO gel, was obtained. Characterization (Fourier transform infrared spectroscopy, nuclear magnetic resonance, scanning electron microscopy) results indicated that the assembled hydrogel was successfully prepared with a three-dimensional network structure and, thereafter, the high strength and elasticity due to the complete polymeric net formed by dense hydrogen bonds in the freezing process. The as-made PVA/PEG/GO hydrogel was then composited with nonwoven fabric for electrocardiogram (ECG) electrodes. The ECG acquisition data indicated that the prepared hydrogel has good electro-conductivity and can obtain stable ECG signals for humans in a static state and in motion (with a small amount of drift). A comparison of results indicated that the prepared PVA/PEG/GO gel obtained the same quality of ECG signals with commercial conductive gel with fewer cases of allergies and pruritus in volunteer after six hours of wear.
URI: http://hdl.handle.net/10397/76198
ISSN: 2073-4360
DOI: 10.3390/polym9070259
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