Abstract
Antimicrobial coated fabrics have a wide spectrum of use in grooming, biomedical and water purification applications. In this work, we report the antimicrobial property of a nano blend prepared from crab-shell based chitosan and nano ZnO and dip-coated on a silk fabric sample. All the synthesized materials were subjected to FT-IR, XRD and TGA studies to assess the functionality, crystallinity and thermal stability. Deacetylation of chitin to chitosan was revealed by the decrease in the intensity of the acetyl group peak at 1641 cm-1 in chitosan. The crystallite size of the synthesized nano ZnO was found be 15 nm from XRD analysis. Appearance of the characteristics peaks of chitosan (9.58°, 19.98°) and ZnO (31.86°, 34.71°, 36.44°, 56.65°, 62.99° and 68.02°) together in XRD pattern of the blended sample confirmed the blending of chitosan and nano ZnO. The deposition of the nanoblend on the coated silk fabrics was shown by SEM analysis. An inhibition zone of 3mm around the nanoblend coated silk fabric sample against E. coli bacteria clearly indicated that synthesized chitosan/ZnO nanoblend possessed good antibacterial activity.
Published Version
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