Determination of the porosity to thickness ratio Ak/Δx for UF and MF membranes by diffusion experiments

Masselin, Isabelle

doi:10.1016/s0376-7388(00)00322-7

Cited by 12 publications

(1 citation statement)

References 15 publications

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“…The structural features and effective charged density of a membrane can be determined by means of diffusion experiments using aqueous solution of neutral solutes and strong electrolytes based on the theoretical models. These parameters play a main role in developing models and flux precision of different kinds of membranes 19…”

Section: Introductionmentioning

confidence: 99%

Theoretical studies on structural and electrical properties of PES/SPEEK blend nanofiltration membrane

Ismail

Lau

2009

AIChE Journal

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in Wiley InterScience (www.interscience.wiley.com).Polyethersulfone (PES) nanofiltration membranes were prepared using a simple dryjet wet spinning technique with different contents of sulfonated poly(ether ether ketone) (SPEEK) ranging from 0 to 4 wt %. The structural parameters (r p and A k /Dx) and electrostatic properties (n and X) of the blend membranes were deduced by employing the combination of irreversible thermodynamic model, steric hindrance pore (SHP) model, and Teorell-Meyer-Sievers (TMS) model. The modeling results obtained have been analyzed and discussed. The mean pore radius and pore size distribution of the blends were also determined based on the theoretical models. The results showed that pore radius increased with increasing the concentration of SPEEK from 0 to 2 wt % but decreased with a further increase in SPEEK content. The water flux, however, showed a systematically increase with increasing SPEEK content. The SPEEK also showed significant effect on membrane electrical properties. Both effective charge density and ratio of effective charge density to electrolyte solution increased with increasing concentration of SPEEK in the dope solution, reaching a value of À21.02 and À2.29, respectively. The pore radius which was determined by using different transport models has also been analyzed and discussed. It is found that the addition of SPEEK into dope solution is one of the paramount parameters in developing the negatively charged nanofiltration membrane with enhanced water flux while retaining the pore radius in the nanometer range. V

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Section: Introductionmentioning

confidence: 99%