中文版 | English
Title

Harnessing osmotic swelling stress for robust hydrogel actuators

Author
Corresponding AuthorYang, Canhui
Publication Years
2022-06-01
DOI
Source Title
ISSN
1744-683X
EISSN
1744-6848
Volume18Pages:5177-5184
Abstract

The volumetric expansion of hydrogels driven by osmotic swelling stress has enabled hydrogel actuators for myriad applications. However, most existing studies disregard optimizing the osmotic swelling stress for powerful actuation and simply utilize the osmotic swelling stress to trigger certain modes of actuation. In this work, we probe the osmotic swelling stress of hydrogels using polyacrylamide as a model system. We design and perform constrained swelling experiments to measure the osmotic swelling stresses at different levels of constraint and compare the results to the theoretical predictions based on the Flory-Huggins model. We optimize the osmotic swelling properties by tuning the constituents and structures of the hydrogel and achieve an enhancement of the magnitude of actuation stress from similar to 180 kPa to similar to 400 kPa. As a proof of concept, we demonstrate a robust hydrogel jack that can lift a weight 2000 times its own weight by harnessing the high osmotic swelling stress. The feasibility and limits of harnessing the osmotic swelling stress of hydrogels for actuation are discussed.

URL[Source Record]
Indexed By
SCI ; EI
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
Natural Science Foundation of Guangdong Province[2214050008118] ; Stable Support Plan Program of Shenzhen Natural Science Fund[K21326303] ; Science, Technology and Innovation Commission of Shenzhen Municipality[ZDSYS20210623092005017]
WOS Research Area
Chemistry ; Materials Science ; Physics ; Polymer Science
WOS Subject
Chemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Multidisciplinary ; Polymer Science
WOS Accession No
WOS:000822866800001
Publisher
EI Accession Number
20223012412027
EI Keywords
Actuators ; Osmosis ; Swelling
ESI Classification Code
Control Equipment:732.1 ; Colloid Chemistry:801.3 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Materials Science:951
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:2
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/355843
DepartmentDepartment of Mechanics and Aerospace Engineering
Affiliation
1.Southern Univ Sci & Technol, Shenzhen Key Lab Soft Mech & Smart Mfg, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Soft Mech Lab, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China
First Author AffilicationDepartment of Mechanics and Aerospace Engineering
Corresponding Author AffilicationDepartment of Mechanics and Aerospace Engineering
First Author's First AffilicationDepartment of Mechanics and Aerospace Engineering
Recommended Citation
GB/T 7714
He, Xitao,Zhu, Jie,Yang, Canhui. Harnessing osmotic swelling stress for robust hydrogel actuators[J]. Soft Matter,2022,18:5177-5184.
APA
He, Xitao,Zhu, Jie,&Yang, Canhui.(2022).Harnessing osmotic swelling stress for robust hydrogel actuators.Soft Matter,18,5177-5184.
MLA
He, Xitao,et al."Harnessing osmotic swelling stress for robust hydrogel actuators".Soft Matter 18(2022):5177-5184.
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