Study of antimicrobial properties of cotton medical textiles treated with citric acid and dried/cured by microwaves |
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Authors: | Ana Budimir Sandra Bischof Vukusic Sandra Grgac Flincec |
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Institution: | (1) Department of Clinical and Molecular Microbiology, University Hospital Center Zagreb, Zagreb, Croatia;(2) Department of Textile Technology & Ecology, University of Zagreb Faculty of Textile Technology, Prilaz Baruna Filipovica 28a, 10000 Zagreb, Croatia; |
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Abstract: | The purpose of this study was to examine antibacterial and antifungal activity of antibacterial finish based on Citric acid
on cotton medical textiles. The ability to effectively reduce the number of gram-negative, gram-positive bacteria and yeast
was evaluated, specifically comparing the antibacterial activity after two different drying/curing methods. Citric acid (CA)
and diethyl–tetradecyl–3–(trimethoxysilyl)-propyl] ammonium chloride (Quat) were used for hygiene and disinfection purposes
of medical textiles in this study. It was applied by pad-dry process and its fixation to cellulose hydroxyls was enhanced
either by high curing temperatures or microwaves (MW). Determination of antibacterial activity of finished products was performed
according to ISO 20743:2007 standard before the washing and after the 10 washing cycles. Antibacterial activity was tested
against gram-negative bacteria, Escherichia coli, gram-positive-Staphylococcus aureus and yeast, Candida albicans. Obtained results are confirming the possibility of eco-friendly CA application, for the purpose of antimicrobial finishing
of cotton medical textiles. Prevention of nosocomial infections with the Citric acid is possible using both curing methods
(convection and microwave) and furthermore, the treatment is durable up to 10 washing cycles. Citric acid, as one of the suitable
active substances is crosslinked to the cellulose hydroxyls by the formation of ester linkages. Its antimicrobial effectiveness
against the chosen microorganisms proved to be the best against S. aureus. Applied finish bath has additional crease proof effectiveness providing sufficient both antimicrobial and crease proof effectiveness,
so as the durability against 10 washing cycles. |
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