Issue 4, 2022

Ionic liquids enable the preparation of a copper-loaded gel with transdermal delivery function for wound dressings

Abstract

Antibacterial hydrogel dressings play an important role in wound healing and infection treatment. The majority of hydrogels are obtained through chemical cross-linking and complex synthesis or processing. Copper ions (Cu2+) have been involved in sterilization; however, their direct use may lead to high local concentrations and heavy metal toxic side effects. Herein, dopamine (DA) was polymerized in situ along a polyvinyl alcohol (PVA) chain and chelated copper ions (Cu2+) to form a mixture. Ionic liquid (IL) choline–glycolate (CGLY) was added to the mixture to form an ionic gel. CGLY promotes gel formation through intermolecular hydrogen bonds with the polymer chains and avoids the use of toxic chemical crosslinking agents. Meanwhile, CGLY can also promote the release of Cu2+ and generate hydrogel free radicals (˙OH) in the wound through chemodynamic therapy to kill drug-resistant bacteria. In addition, the excellent transdermal property of CGLY enables the released Cu2+ to stimulate cell migration and accelerate wound healing. The gel exhibits favorable biocompatibility and its use has been demonstrated in skin infection therapy of mice.

Graphical abstract: Ionic liquids enable the preparation of a copper-loaded gel with transdermal delivery function for wound dressings

Supplementary files

Article information

Article type
Paper
Submitted
15 Nov 2021
Accepted
27 Dec 2021
First published
29 Dec 2021

Biomater. Sci., 2022,10, 1041-1052

Ionic liquids enable the preparation of a copper-loaded gel with transdermal delivery function for wound dressings

Y. Gao, W. Zhang, Y. Wei, Y. Li, T. Fei, Y. Shu and J. Wang, Biomater. Sci., 2022, 10, 1041 DOI: 10.1039/D1BM01745D

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