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A muscle mimetic polyelectrolyte–nanoclay organic–inorganic hybrid hydrogel: its self-healing, shape-memory and actuation properties
Banerjee, S.L. Hoskins, Richard Rimmer, Stephen Singha, N.K.
Banerjee, S.L.
Hoskins, Richard
Rimmer, Stephen
Singha, N.K.
Publication Date
2019
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© 2019 Open Access published by RSC. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.
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17/01/2019
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Abstract
Here in, we describe a non-covalent (ionic interlocking and hydrogen bonding) strategy of self-healing in a covalently crosslinked organic-inorganic hybrid 15 nanocomposite hydrogel, with special emphasize on it's improved mechanical stability. The hydrogel was prepared via in-situ free radical polymerization of sodium acrylate (SA) and successive crosslinking in the presence of poly(2-(methacryloyloxy)ethyl trimethyl ammonium chloride) (PMTAC) grafted cationically armed starch and organically modified montmorillonite (OMMT). This hydrogel shows stimuli triggered self-healing following damage in both neutral and acidic solutions (pH=7.4 and pH=1.2). This was elucidated by tensile strength and rheological analyses of the hydrogel segments joined at their fractured points. Interestingly this hydrogel can show water based shape memory effects. It was observed that the ultimate tensile strength (UTS) of the self-healed hydrogel at pH = 7.4 was comparable to extensor digitorum longus (EDL) muscle of the New Zealand white rabbit. The as synthesized self-healable hydrogel was found to be non-cytotoxic against NIH 3T3 fibroblast cells.
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Banerjee SL, Swift T, Hoskins R, Rimmer S and Singha NK (2019) A muscle mimetic polyelectrolyte–nanoclay organic–inorganic hybrid hydrogel: its self-healing,
shape-memory and actuation properties. Journal of Materials Chemistry B. 7(9): 1475-1493
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