Journal
RADIATION PHYSICS AND CHEMISTRY
Volume 80, Issue 12, Pages 1358-1362Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.radphyschem.2011.07.009
Keywords
Cellulose; Gamma-irradiation grafting; Glycidyl methacrylate; Cyclodextrin; Adsorption
Funding
- Hungarian Science Foundation (OTKA) [K 60096, CK 80154]
- International Atomic Energy Agency [16485, HUN8008]
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Cotton-cellulose was functionalized using gamma-irradiation-induced grafting of glycidyl methacrylate (GMA) to obtain a hydrophobic cellulose derivative with epoxy groups suitable for further chemical modification. Two grafting techniques were applied. In pre-irradiation grafting (PIG) cellulose was irradiated in air and then immersed in a GMA monomer solution, whereas in simultaneous grafting (SG) cellulose was irradiated in an inert atmosphere in the presence of the monomer. PIG led to a more homogeneous fiber surface, while SG resulted in higher grafting yield but showed clear indications of some GMA-homopolymerization. Effects of the reaction parameters (grafting method, absorbed dose, monomer concentration, solvent composition) were evaluated by SEM, gravimetry (grafting yield) and FTIR spectroscopy. Water uptake of the cellulose decreased while adsorption of a pesticide molecule increased upon grafting. The adsorption was further enhanced by beta-cyclodextrin immobilization during SG. This method can be applied to produce adsorbents from cellulose based agricultural wastes. (C) 2011 Elsevier Ltd. All rights reserved.
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