Interpreting rejection in SRNF across grafted ceramic membranes through the Spiegler-Kedem model
| Autor: | Cheryl Tanardi, Renaud B. Merlet, Arian Nijmeijer, Louis Winnubst, Ivo F.J. Vankelecom |
|---|---|
| Přispěvatelé: | Inorganic Membranes |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Pore size
Spiegler Kedem Katchalsky model Materials science Diffusion Alumina membranes Ceramic membranes Filtration and Separation 02 engineering and technology 010402 general chemistry 01 natural sciences Biochemistry PDMS Polymer chemistry medicine General Materials Science Ceramic Physical and Theoretical Chemistry Grafting Organic solvent technology industry and agriculture 021001 nanoscience & nanotechnology 22/4 OA procedure 0104 chemical sciences Membrane Chemical engineering visual_art visual_art.visual_art_medium Organic solvent nanofiltration Polymeric membrane Swelling medicine.symptom Gamma aluminum oxide 0210 nano-technology |
| Zdroj: | Journal of membrane science, 525, 359-367. Elsevier |
| ISSN: | 0376-7388 |
| DOI: | 10.1016/j.memsci.2016.12.013 |
| Popis: | PDMS-grafted alumina membranes have already demonstrated high organic solvent permeabilities; described and modeled in this paper are their retention capabilities. In contrast to pure PDMS polymeric membranes, higher retentions were found in nonpolar solvents than in polar solvents. This is attributed to a solvent-induced pore-constriction behavior: confined swelling of PDMS, grafted into the membrane pores, was found to increase retention. To test this hypothesis, pore sizes were obtained by integrating the Ferry, Verniory and steric hindrance pore (SHP) equations into the Spiegler Kedem Katchalsky (SKK) model in order to predict the retention of dyes. Ultimately, a diffusion pore size was introduced into the SKK model to reflect the ability of the solute to diffuse through the swollen PDMS graft. A better understanding of the transport mechanisms that impact performance was achieved by incorporating the unique pore structure of these ceramic-based hybrid membranes into the SKK model. |
| Databáze: | OpenAIRE |
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