title: Synthesis of methylcellulose-silver nanocomposite and investigation of mechanical and antimicrobial properties.
abstract: In this paper we reported preparation of methylcellulose-silver nanocomposite films by mixing of aqueous solution of methylcellulose with silver nitrate followed by casting. The silver nanoparticles were generated in methylcellulose matrix through reduction and stabilization by methylcellulose. The surface plasmon band at 412 nm indicated the formation of Ag nanoparticles. The MC-Ag nanocomposite films were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared (FTIR). The X-ray diffraction analysis of synthesized MC-Ag nanocomposite films revealed that metallic silver was present in face centered cubic crystal structure. Average crystallite size of silver nanocrystal was 22.7 nm. The FTIR peaks of as-synthesized MC-Ag nanocomposite fully designated the strong interaction between Ag nanoparticles and MC matrix. Nano-sized silver modified methylcellulose showed enhanced mechanical properties i.e. the introduction of Ag leading to both strengthening and toughening of MC matrix. The methylcellulose-silver nanocomposite films offered excellent antimicrobial activity against various microorganisms.
authors.affiliation: Department of Polymer Science and Technology, University College of Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India.
authors.forename: Dipanwita
authors.initials: D
authors.lastname: Maity
authors.forename: Md Masud Rahaman
authors.initials: MM
authors.lastname: Mollick
authors.forename: Dibyendu
authors.initials: D
authors.lastname: Mondal
authors.forename: Biplab
authors.initials: B
authors.lastname: Bhowmick
authors.forename: Mrinal Kanti
authors.initials: MK
authors.lastname: Bain
authors.forename: Kalipada
authors.initials: K
authors.lastname: Bankura
authors.forename: Joy
authors.initials: J
authors.lastname: Sarkar
authors.forename: Krishnendu
authors.initials: K
authors.lastname: Acharya
authors.forename: Dipankar
authors.initials: D
authors.lastname: Chattopadhyay
mesh_terms: D000890:Anti-Infective Agents / Q000138:chemical synthesis / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects*; D053768:Metal Nanoparticles / Q000737:chemistry*; D008747:Methylcellulose / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D012835:Silver Nitrate / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D000890:Anti-Infective Agents; D008747:Methylcellulose; D012835:Silver Nitrate