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  Characterization of poly(ether/amide) and poly(ether/urea) thin film composite membranes by transport coefficients

Pusch, W., & Riley, R. (1977). Characterization of poly(ether/amide) and poly(ether/urea) thin film composite membranes by transport coefficients. Desalination, 22(1-3), 191-203. doi:10.1016/S0011-9164(00)88375-7.

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 Creators:
Pusch, Wolfgang1, Author           
Riley, Robert1, Author           
Affiliations:
1Department of Physical Chemistry, Max Planck Institute of Biophysics, Max Planck Society, ou_3264819              

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 Abstract: Several thin-film composite membrane systems, Poly(ether/amide) and Poly-ether/urea) have been characterized in hyperfiltration and dialysis-osmosis experiments. Using the phenomenological relationships of the thermodynamics of irreversible processes, the hydrodynamic permeability, lp, the osmotic permeability, lπ, the asymptotic salt rejection, r , and the reflection coefficient, σ, have been determined as functions of NaCl concentration at 25δC. All membranes yielded large values of r even at brine concentrations of 0.5 M NaCl and a small variation of salt rejection r, with pressure corresponding to a ratio of lπ/lπ not much larger than r2. The reflection coefficients received from dialysis-osmosis experiments differ substantially from the corresponding values of the asymptotic salt rejection, r. A comparison between the transport coefficients of these thin-film composite membranes and the transport coefficients of some asymmetric cellulose acetate membranes show that the thin-film composite membranes behave much more like a semipermeable membrane.

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Language(s): eng - English
 Dates: 2001-08-021977-12-01
 Publication Status: Issued
 Pages: 13
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/S0011-9164(00)88375-7
 Degree: -

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Title: Desalination
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 22 (1-3) Sequence Number: - Start / End Page: 191 - 203 Identifier: ISSN: 0011-9164
CoNE: https://pure.mpg.de/cone/journals/resource/954925394374