Please use this identifier to cite or link to this item:
Title: Development of an ultra-stretchable double-network hydrogel for flexible strain sensors
Authors: Li, Huijun
Zheng, Han
Tan, Yu Jun
Tor, Shu Beng
Zhou, Kun
Keywords: Engineering
Issue Date: 2021
Source: Li, H., Zheng, H., Tan, Y. J., Tor, S. B. & Zhou, K. (2021). Development of an ultra-stretchable double-network hydrogel for flexible strain sensors. ACS Applied Materials and Interfaces, 13(11), 12814-12823.
Journal: ACS Applied Materials and Interfaces 
Abstract: The applications of hydrogels are restricted by their weak mechanical properties due to the inefficient dissipation of energy in their intrinsic structures. A double-network (DN) hydrogel has been developed by combining an ionically crosslinked agar network, a covalently crosslinked acrylic acid (AAC) network, and a dynamic and reversible ionically crosslinked coordination between AAC chains and Fe3+ ions. A model has been proposed to reveal the mechanism of the improved mechanical properties in the DN agar/AAC–Fe3+ hydrogel. The hydrogen-bond crosslinked double helices of agar and ionic-coordination interactions of AAC–Fe3+ serve as sacrificial bonds during large deformation to dissipate the energy while the reversible AAC–Fe3+ interactions can be regenerated after stress relief, which greatly increases the toughness of the DN hydrogel. The prepared DN hydrogel demonstrates a remarkable stretchability with a break strain up to 3174.3%, a high strain sensitivity with a gauge factor of 0.83 under the strain of 1000%, and a good 3D printability which guarantee its various potential applications in flexible strain sensors for human motion detection, electronic skin, and soft robots.
ISSN: 1944-8244
DOI: 10.1021/acsami.0c19104
Schools: School of Mechanical and Aerospace Engineering 
Research Centres: Singapore Centre for 3D Printing 
Environmental Process Modelling Centre 
Nanyang Environment and Water Research Institute 
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials and Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles
NEWRI Journal Articles
SC3DP Journal Articles

Files in This Item:
File Description SizeFormat 
Development of an ultra-stretchable double-network hydrogel for flexible strain sensors.pdf1.09 MBAdobe PDFThumbnail

Citations 5

Updated on May 22, 2023

Web of ScienceTM
Citations 5

Updated on May 25, 2023

Page view(s)

Updated on May 29, 2023

Download(s) 20

Updated on May 29, 2023

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.