Highly Stretchable, Strain-Sensitive, and Ionic-Conductive Cellulose-Based Hydrogels for Wearable Sensors

To extend the applications of natural polymer-based hydrogels to wearable sensors, it is both important and a great challenge to improve their mechanical and electrical performance. In this work, highly stretchable, strain-sensitive, and ionic-conductive cellulose-based hydrogels (CHs) were prepared...

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Bibliographic Details
Published in:Polymers 2019-12, Vol.11 (12), p.2067
Main Authors: Tong, Ruiping, Chen, Guangxue, Tian, Junfei, He, Minghui
Format: Article
Language:English
Subjects:
Acids
Acrylic acid
Acrylics
Biopolymers
Cellulose
Copolymerization
Fourier transforms
Human motion
Hydrogels
Mechanical properties
Motion perception
Natural polymers
Ratios
Reagents
Scanning electron microscopy
Sensitivity
Sensors
Spectrum analysis
Stretchability
Tensile strain
Wearable computers
Wearable technology
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Summary:To extend the applications of natural polymer-based hydrogels to wearable sensors, it is both important and a great challenge to improve their mechanical and electrical performance. In this work, highly stretchable, strain-sensitive, and ionic-conductive cellulose-based hydrogels (CHs) were prepared by random copolymerization of allyl cellulose and acrylic acid. The acquired hydrogels exhibit high stretchability (~142% of tensile strain) and good transparency (~86% at 550 nm). In addition, the hydrogels not only demonstrate better sensitivity in a wide linear range (0%-100%) but also exhibit excellent repeatable and stable signals even after 1000 cycles. Notably, hydrogel-based wearable sensors were successfully constructed to detect human movements. Their reliability, sensitivity, and wide-range properties endow the CHs with great potential for application in various wearable sensors.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym11122067