Diffusion coefficients of water in biobased hydrogel polymer matrices by nuclear magnetic resonance imaging

摘要: The diffusion coefficients of water in biobased hydrogels were measured with a simple NMR method. This method tracked the migration deuterium oxide through imaging data that was fit to equation. results show 5 wt % soybean-oil-based hydrogel gave an aqueous 1.37 (±0.21) × 10−9 m2/s. value for 0.5 saponified starch–polyacrylonitrile graft copolymer 1.28 (±0.26) m2/s, which remained about same at increased polymer content hydrogel. For comparison, commercially available acrylic evaluated methodology and found have coefficient 7.6 (±1.3) 10−10 half products studied here. These parameters are significant interest development controlled release applications. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci.,