Anti-fatigue-fracture hydrogels
Name
eaau8528.full.pdf
Description
Published version
Size
969.98 KB
Format
Adobe PDF
Checksum (MD5)
8132e77b8486fab9bf52e46bd426f18b
Author(s)
Lin, Shaoting
Liu, Xinyue
Liu, Ji
Yuk, Hyunwoo
Loh, Hyun-Chae
Parada, German A.
Settens, Charles
Song, Jake
Masic, Admir
McKinley, Gareth H.
Date Issued
January 2019
Journal
Science advances
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Lin, Shaoting et al. "Anti-fatigue-fracture hydrogels." Science advances 5 (2019): eaau8528 © 2019 The Author(s)
Version
Final published version
Abstract
The emerging applications of hydrogels in devices and machines require hydrogels to maintain robustness under cyclic mechanical loads. Whereas hydrogels have been made tough to resist fracture under a single cycle of mechanical load, these toughened gels still suffer from fatigue fracture under multiple cycles of loads. The reported fatigue threshold for synthetic hydrogels is on the order of 1 to 100 J/m² . We propose that designing anti-fatigue-fracture hydrogels requires making the fatigue crack encounter and fracture objects with energies per unit area much higher than that for fracturing a single layer of polymer chains. We demonstrate that the controlled introduction of crystallinity in hydrogels can substantially enhance their anti-fatigue-fracture properties. The fatigue threshold of polyvinyl alcohol (PVA) with a crystallinity of 18.9 weight % in the swollen state can exceed 1000 J/m².
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Massachusetts Institute of Technology. Department of Chemical Engineering
MIT Materials Research Laboratory
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution NonCommercial License 4.0
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DOI of Published Version
https://doi.org/10.1126/sciadv.aau8528
