title: Synthesis, characterization and antimicrobial properties of grafted sugarcane bagasse/silver nanocomposites.
abstract: Sugarcane bagasse (SCB) was grafted with acrylamide (AAm) and glycidyl methacrylate (GMA) by chemical oxidation method. The effect of monomer/initiator molar ratio, reaction time, reaction temperature and material to liquor ratio on the degree of grafting was investigated. The optimum conditions for grafting were: monomer/initiator molar ratio 1 for AAm and 2 for GMA, reaction time 4h, reaction temperature 80°C and materials to liquor ratio 1:20. Silver nanoparticles (AgNPs) were prepared and characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Ungrafted SCB, SCB-g-AAm and SCB-g-GMA were impregnated into silver (Ag) nanoparticles colloidal solution. The ungrafted SCB, grafted SCB and their nanocomposites with Ag nanoparticles were characterized by FT-IR spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The grafted SCB/Ag nanoparticles exhibit better antimicrobial activity against Escherichia coli as the model Gram-negative bacteria, Staphylococcus aureus as the model Gram-positive bacteria and Aspergillus flavus and Candida albicans (yeasts) than ungrafted SCB/AgNPs.
authors.affiliation: Polymers and Pigments Department, National Research Center, Dokki, Cairo 12311, Egypt. Electronic address: nor_5020@yahoo.com.
authors.forename: N A
authors.initials: NA
authors.lastname: Abdelwahab
authors.affiliation: Cellulose and Paper Department, National Research Center, Dokki, Cairo 12311, Egypt.
authors.forename: N
authors.initials: N
authors.lastname: Shukry
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry* / Q000494:pharmacology*; D001231:Aspergillus flavus / Q000187:drug effects; D002176:Candida albicans / Q000187:drug effects; D002482:Cellulose / Q000737:chemistry*; D060326:Chemistry Techniques, Synthetic; D004553:Electric Conductivity; D004926:Escherichia coli / Q000187:drug effects; D007700:Kinetics; D053768:Metal Nanoparticles / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D053761:Nanocomposites / Q000737:chemistry*; D036103:Nanotechnology; D058105:Polymerization; D031786:Saccharum / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013211:Staphylococcus aureus / Q000187:drug effects; D013696:Temperature
chemical_list: D000890:Anti-Infective Agents; D012834:Silver; D002482:Cellulose; C027433:bagasse
keywords: Antimicrobial activity; Bagasse cellulose; Characterization; Electrical conductivity; Grafting; Silver nanocomposites