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International Journal of Carbohydrate Chemistry
Volume 2012 (2012), Article ID 693629, 8 pages
http://dx.doi.org/10.1155/2012/693629
Research Article

ZnO Nanoparticles-Chitosan Composite as Antibacterial Finish for Textiles

1Deutsches Textilforschungszentrum Nord-West gGmbH (DTNW), 47798 Krefeld, Germany
2National Research Centre, Textile Division, Textile Chemistry and Technology, Department of Preparation and Finishing of Cellulosic Fibers, Tahrir Street, Dokki, P.O. Box 12622, Giza, Egypt
3Genetic Engineering and Biotechnology Research Institute, Minoufiya University, P.O. Box 79/22857, El-Sadat City, Egypt
4Universität Duisburg-Essen, Technical Chemistry II, Universitätsstrasse 7, 45141 Essen, Germany
5Center for Nanointegration Duisburg-Essen CeNIDE, 47048 Duisburg, Germany

Received 24 September 2012; Revised 6 November 2012; Accepted 6 November 2012

Academic Editor: J. F. Vliegenthart

Copyright © 2012 Asmaa Farouk et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The antibacterial performance of sol-gel-derived inorganic-organic hybrid polymers filled with ZnO nanoparticles-chitosan against a gram-negative bacterium Escherichia coli and a gram-positive Micrococcus luteus has been investigated. Three different molecular weights (MW) of chitosan (CTS) 1.36 · 105, 2.2 · 105, and 3.0 · 105 Da with equal degree of deacetylation (DD, 85%) (coded as S 85-60, He 85-250, and He 85-500) with equal degree of deacetylation (DD, 85%) were examined. ZnO was prepared by the base hydrolysis of zinc acetate in isopropanol using lithium hydroxide (LiOH · H2O) to hydrolyze the precursor. Sol-gel-based inorganic-organic hybrid polymers were modified with these oxides and were applied to cellulosic cotton (100%) and cotton/polyester (65/35%) fabrics. Inorganic-organic hybrids polymers were based on 3-glycidyloxypropyltrimethoxysilane (GPTMS). Bacteriological tests were performed in nutrient agar media on solid agar plates and in liquid broth systems using ZnO nanoparticles with average particle size of (40 nm). Our study showed the enhanced antibacterial activity of ZnO nanoparticles chitosan (different MW) of against a gram-negative bacterium Escherichia coli DSMZ 498 and a gram-positive Micrococcus luteus ATCC 9341 in repeated experiments. The antibacterial activity of textile treated with ZnO nanoparticles chitosan increases with decreasing the molecular weight of chitosan.