This article is a US Government work and, as such, is in the public domain in the United State of America.
Article first published online: 3 MAY 2012
Copyright © 2012 Wiley Periodicals, Inc.
Journal of Applied Polymer Science
Special Issue: Biopolymers and Renewably Sourced Polymers
Volume 125, Issue S2, pages E580–E585, 25 September 2012
How to Cite
Doll, K. M., Vermillion, K. E., Fanta, G. F. and Liu, Z. (2012), Diffusion coefficients of water in biobased hydrogel polymer matrices by nuclear magnetic resonance imaging . J. Appl. Polym. Sci., 125: E580–E585. doi: 10.1002/app.36798
Any mention of trade names or commercial products in this publication is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the U.S. Department of Agriculture. The U.S. Department of Agriculture is an equal opportunity provider and employer.
- Issue published online: 6 JUN 2012
- Article first published online: 3 MAY 2012
- Manuscript Accepted: 10 JAN 2012
- Manuscript Received: 7 OCT 2011
- drug delivery systems
The diffusion coefficients of water in biobased hydrogels were measured with a simple NMR method. This method tracked the migration of deuterium oxide through imaging data that was fit to a diffusion equation. The results show that a 5 wt % soybean-oil-based hydrogel gave an aqueous diffusion of 1.37 (±0.21) × 10−9 m2/s. The value for a 0.5 wt % saponified starch–polyacrylonitrile graft copolymer was 1.28 (±0.26) × 10−9 m2/s, which remained about the same at increased polymer content in the hydrogel. For comparison, a commercially available acrylic polymer was evaluated with the same methodology and was found to have a diffusion coefficient of 7.6 (±1.3) × 10−10 m2/s, about half that of the biobased products studied here. These parameters are of significant interest in the development of controlled release applications. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2012