Table of Contents
Polymers, Volume 12, Issue 10 (October 2020) – 262 articles
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Cover Story (view full-size image) Engineering applications of hydrogels are generally limited by the common problem of their softness [...] Read more. Engineering applications of hydrogels are generally limited by the common problem of their softness and brittleness. In this study, a composite double network ionic hydrogel (CDN-gel) was synthesized via a facile visible-light-trigger polymerization combined with salt impregnation. The excellent mechanical properties were lent to CDN-gel by the introduction of multi-sacrificial bonds. The CDN-gel has high toughness (48 MJ/m3), stretchability (700%), Young's modulus (3.5 MPa), and notch-insensitivity. The residual strain is <25% after stretch-releasing for 1000 cycles at a strain of 200%. The above properties are expected to expand the application of hydrogel in anti-fatigue and damping fields. View this paper.