Measurement of membrane pore interconnectivity

Chia Chi Ho, Andrew L. Zydney

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Several studies have suggested that the rate and extent of membrane fouling can be strongly affected by the interconnectivity of the membrane pore structure. For example, membranes with highly interconnected pores should allow fluid to flow around and under any pore blockage on the membrane surface, significantly reducing the effect of this blockage on the filtrate flux. It has not, however, been possible to quantify these effects due to the absence of any experimental technique for measuring the pore connectivity. We have developed a new technique for evaluating the pore connectivity from data for the hydraulic permeability and/or solute diffusion coefficient in the directions normal to and parallel to the membrane surface. Experiments were performed by blocking different regions of the upper and lower surfaces of the membrane to change the relative contributions of the normal and transverse flows. Data were analyzed using a theoretical model for two-dimensional flow or transport in the porous membrane. Studies performed with polyvinylidene fluoride (PVDF) and polytetrafluoroethylene (PTFE) membranes showed distinct differences in the extent of pore connectivity, consistent with the different formation methods and underlying pore morphologies for these membranes. Copyright (C) 2000 Elsevier Science B.V.

Original languageEnglish (US)
Pages (from-to)101-112
Number of pages12
JournalJournal of Membrane Science
Volume170
Issue number1
DOIs
StatePublished - May 15 2000

Fingerprint

membranes
Membranes
porosity
Membrane fouling
Polytetrafluoroethylene
two dimensional flow
fouling
Pore structure
polytetrafluoroethylene
Polytetrafluoroethylenes
vinylidene
hydraulics
fluorides
Permeability
permeability
solutes
Hydraulics
Theoretical Models
diffusion coefficient
Fluxes

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Cite this

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Measurement of membrane pore interconnectivity. / Ho, Chia Chi; Zydney, Andrew L.

In: Journal of Membrane Science, Vol. 170, No. 1, 15.05.2000, p. 101-112.

Research output: Contribution to journalArticle

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