Tough, Swelling-Resistant, Self-Healing, and Adhesive
Dual-Cross-Linked Hydrogels Based on Polymer–Tannic Acid Multiple
Hydrogen Bonds
Posted on 2018-02-20 - 19:52
We demonstrate a
facile and universal strategy in the fabrication of dual-cross-linked
(DC) single network hydrogels with high toughness, “nonswellability”,
rapid self-healing, and versatile adhesiveness based on polymer–tannic
acid (TA) multiple hydrogen bonds. Two widely used hydrogels, physically
cross-linked poly(vinyl alcohol) and chemically cross-linked polyacrylamide,
have been transformed to TA-based DC hydrogels by dipping the corresponding
aerogels into TA solution. The second cross-link via multiple polymer–TA
hydrogen bonds effectively suppresses the crack propagation, resulting
in both DC gels with high mechanical strength. But these two TA-based
DC hydrogels go through different deformation mechanisms during the
stretching based on analyzing their stress–strain curves using
the Mooney–Rivlin equation. Moreover, these DC hydrogels are
swelling-resistant, with strong toughness, good self-recoverability,
rapid self-healing, and versatile adhesiveness. This work provides
a simple route to fabricate multifunctional DC hydrogels, hopefully
promoting their applications as biomedical materials.
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Fan, Hailong; Wang, Jiahui; Jin, Zhaoxia (2018). Tough, Swelling-Resistant, Self-Healing, and Adhesive
Dual-Cross-Linked Hydrogels Based on Polymer–Tannic Acid Multiple
Hydrogen Bonds. ACS Publications. Collection. https://doi.org/10.1021/acs.macromol.7b02653
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