Journal
ULTRASONICS SONOCHEMISTRY
Volume 29, Issue -, Pages 244-250Publisher
ELSEVIER
DOI: 10.1016/j.ultsonch.2015.09.021
Keywords
Cellulase; Sonochemistry; Zinc oxide; Nanoparticles; Antibacterial coatings; Medical textiles
Categories
Funding
- EU [FP7-228730]
- Spanish Ministerio de Educacion, Cultura y Deporte (MECD) [FPU12/06258]
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The antimicrobial finishing is a must for production of medical textiles, aiming at reducing the bioburden in clinical wards and consequently decreasing the risk of hospital-acquired infections. This work reports for the first time on a simultaneous sonochemical/enzymatic process for durable antibacterial coating of cotton with zinc oxide nanoparticles (ZnO NPs). The novel technology goes beyond the stepwise concept we proposed recently for enzymatic pre-activation of the fabrics and subsequent sonochemical nano-coating, and is designed to produce ready-to-use antibacterial medical textiles in a single step. A multilayer coating of uniformly dispersed NPs was obtained in the process. The enzymatic treatment provides better adhesion of the ZnO NPs and, as a consequence, enhanced coating stability during exploitation. The NPs-coated cotton fabrics inhibited the growth of the medically relevant Staphylococcus aureus and Escherichia coli respectively by 67% and 100%. The antibacterial efficiency of these textile materials resisted the intensive laundry regimes used in hospitals, though only 33% of the initially deposited NPs remained firmly fixed onto the fabrics after multiple washings. (C) 2015 Elsevier B.V. All rights reserved.
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