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Physically and Chemically Dual-crosslinked Hydrogels with Superior Mechanical Properties and Self-Healing Behavior

Abstract

An ideal hydrogel for biomedical engineering or flexible devices should have excellent properties, especially high stretchability, strength, resilience and self-healing ability to withstand cyclic loading and damage. The formation of hydrogels by physically and chemically dual-crosslinked structures is a powerful method to improve the strength and resilience. Here, we designed a dual-crosslinked hydrogel (PCDC) with sodium dodecyl sulfate-stearyl methacrylate (SDS-C18) micelles as physical crosslinkers, amphiphilic polyether modified polysiloxane terminated by isocyanoethyl methacrylate (SiPU) nanoparticles as chemical crosslinkers, and acrylamide (AM) as monomer. The prepared PCDC hydrogels have a tensile strength of above 130 KPa and tensile elongation at break of over 710%, and can quickly recover its original state in cyclic tensile and cyclic compression tests, exhibiting excellent stretchability, strength and resilience. Based on the hydrophobic interactions mechanism, remarkable self-healing behaviors of the hydrogels were also achieved, allowing re-adhesion between cut surfaces without external stimulus.

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Supplementary files

Article information


Submitted
19 Jan 2020
Accepted
11 May 2020
First published
12 May 2020

New J. Chem., 2020, Accepted Manuscript
Article type
Paper

Physically and Chemically Dual-crosslinked Hydrogels with Superior Mechanical Properties and Self-Healing Behavior

X. Zhang, R. Zhang, S. Wu, Y. Sun, H. Yang and B. Lin, New J. Chem., 2020, Accepted Manuscript , DOI: 10.1039/D0NJ00348D

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