Wu, Yanbin and Aluru, NR. (2009) Effect of Cross-Linking on the Diffusion of Water, Ions, and Small Molecules in Hydrogels. The Journal of Physical Chemistry B, 113 (11). p. 3512. ISSN 15206106
Full text not available from this repository. (Request a copy)Abstract
The present study reports on molecular dynamics investigations of chemically cross-linked poly(ethylene glycol) hydrogels with the aim of exploring the diffusion properties of water, ions, and rhodamine within the polymer at the molecular level. The water structure and diffusion properties were studied at various cross-linking densities with molecular weights of the chains ranging from 572 to 3400. As the cross-linking density is increased, the water diffusion decreases and the slowdown in diffusion is more severe at the polymer-water interface. The water diffusion at various cross-linking, densities is correlated with the water hydrogen bonding dynamics. The diffusion of ions and rhodamine also decreased as the cross-linking density is increased. The variation of diffusion coefficient with cross-linking density is related to the variation of water content at different cross-linking densities. Comparison of simulation results and obstruction scaling theory for hydrogels showed similar trends.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FLUORESCENCE CORRELATION SPECTROSCOPY; POLY(ETHYLENE GLYCOL) HYDROGELS; SMALL-ANGLE SCATTERING; AQUEOUS-SOLUTION; DYNAMICS SIMULATIONS; SOLUTE DIFFUSION; POLYMER-SOLUTIONS; FORCE-FIELD; STRUCTURAL-PROPERTIES; DIACRYLATE HYDROGELS |
| InterNano Taxonomy: | Nanomanufacturing Processes |
| Collections: | Nanomanufacturing Research Collection |
| Depositing User: | Danielle Federa |
| Date Deposited: | 17 Jun 2009 15:38 |
| Last Modified: | 17 Jun 2009 15:38 |
| URI: | http://eprints.internano.org/id/eprint/128 |
Actions (login required)
 |
View Item |
