dc.creator | Verros, G. D. | en |
dc.creator | Malamataris, N. A. | en |
dc.date.accessioned | 2015-11-23T10:53:38Z | |
dc.date.available | 2015-11-23T10:53:38Z | |
dc.date.issued | 2001 | |
dc.identifier | 10.1002/1521-3919(20011001)10:8<737 | |
dc.identifier.issn | 1022-1344 | |
dc.identifier.uri | http://hdl.handle.net/11615/34465 | |
dc.description.abstract | Full Paper: A novel method for estimating the mutual and self-diffusion coefficients of a non-solvent/polymer system is proposed in this work. The idea is to stud the evaporation process from non-solvent/solvent/polymer systems as a one-dimensional numerical experiment and to use polymer solution weight versus time data to fit the unknown parameters of the diffusion-coefficient correlations based on free-volume theory. For this purpose, the evaporation process is modeled as a coupled heat- and mass-transfer problem with a moving boundary, and the Galerkin finite-element method is used to solve simultaneously the non-linear governing equations. This method is successfully applied to the estimation of water-cellulose acetate diffusion coefficients and is valid over the whole range of temperatures and concentrations for practical applications in membrane technology. Additionally there is a detailed discussion on if water affects the morphology of the final cellulosic membrane by studying the concentration profiles of the constituents of the casting solution. | en |
dc.source.uri | <Go to ISI>://WOS:000171981600001 | |
dc.subject | FREE-VOLUME THEORY | en |
dc.subject | ASYMMETRIC POLYSULFONE MEMBRANES | en |
dc.subject | REVERSE-OSMOSIS | en |
dc.subject | MEMBRANES | en |
dc.subject | POLYMER-SOLVENT SYSTEMS | en |
dc.subject | DRY-CAST PROCESS | en |
dc.subject | CELLULOSE-ACETATE | en |
dc.subject | IMMERSION-PRECIPITATION | en |
dc.subject | SELF-DIFFUSION | en |
dc.subject | MASS-TRANSFER | en |
dc.subject | SORPTION | en |
dc.subject | KINETICS | en |
dc.subject | Polymer Science | en |
dc.title | Computer-aided estimation of diffusion coefficients in non-solvent/polymer systems | en |
dc.type | journalArticle | en |