Herein, we report a comparative study of silver coated anionic cellulose nanocomposite before (CMC-Ag) and after (AgNPs/CMC) chemical reduction for antibacterial activity. Cellulose nanofibers were prepared by deacetylation of electrospun cellulose acetate nanofibers, which were then treated with sodium chloroacetate to prepare anionic cellulose nanofibers (CMC). Aqueous AgNO3 solution with different concentrations was employed to produce nanofiber composites. To obtain AgNPs/CMC, the resultant Ag/CMC nanofibers were chemically reduced with NaBH4. The nanocomposites were characterized by FE-SEM, FTIR, XPS and SEM-EDS. Antimicrobiality tests were conducted using S. aureus and Escherichia coli bacteria following standard test method JIS L1902, 2008. The EDS results confirmed higher silver content in CMC-Ag nanofibers than AgNPs/CMC nanofibers. The antimicrobial test and EDS results demonstrated higher silver release (larger halo width) by the former in comparison to later which confers better antimicrobiality by CMC-Ag nanofibers.
Keywords: Acetone (Pub Chem CID: 180); Antimicrobiality; Chloroacetic acid (Pub Chem CID: 300); DMF (Pub Chem CID: 6228); Electrospinning; Nanocomposites; Reduction; Silver; Silver nitrate (Pub Chem CID: 24470); Sodium carbonate (Pub Chem CID: 10340); Sodium hydroxide (Pub Chem CID: 14798); Sodium tetrahydroborate (Pub Chem CID: 22959485).
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