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Stabilization and controlled release of micro-encapsulated hydrogen peroxide for wound treatment applications.

Abstract：

AIMS:Hydrogen peroxide (H2 O2 ) disinfection applications are limited by its rapid inactivation. The aims of this study were to (i) micro-encapsulate H2 O2 in silica hydrogels to obtain controlled release up to 72 h, (ii) test hydrogel antimicrobial activity against four common pathogens and (iii) assess H2 O2 release kinetics and antimicrobial activity in 35-65% relative humidity and 37°C to approximate bandaged wound conditions. METHODS AND RESULTS:Hydrogels were characterized using scanning electron microscopy, nitrogen sorption porosimetry, Brunauer Emmet Teller analysis and the Barret-Joyner-Halenda method. Hydrogels formed at lower pH demonstrated increased surface area and decreased pore size, resulting in H2 O2 release lasting 72 h. Using agar well diffusion for antimicrobial activity, statistically significant zones of inhibition (as compared to controls) were seen for Escherichia coli, Staphylococcus aureus, Pseudomona aeruginiosa and Vancomycin-resistant Enterococcus faecalis. Activity remained for hydrogels aged for 72 h in humid, 37°C conditions. CONCLUSIONS:Hydrogels can be synthesized to provide a continuous, controlled release of H2 O2 for up to 72 h. SIGNIFICANCE AND IMPACT OF THE STUDY:Stable, controlled-release H2 O2 hydrogels have potential applications for wound treatment and disinfection of medical equipment, through bonding to bandages or materials such as catheter lumens.

journal_name

J Appl Microbiol

journal_title

Journal of applied microbiology

authors

Dogan-Guner EM,Mohamed H,Orbey N,Goodyear N

doi

10.1111/jam.14177

subject

Has Abstract

pub_date

2019-03-01 00:00:00

pages

965-972

issue

3

eissn

1364-5072

issn

1365-2672

journal_volume

126

pub_type

杂志文章

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