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Titolo:
Measurement of membrane pore interconnectivity
Autore:
Ho, CC; Zydney, AL;
Indirizzi:
Univ Delaware, Dept Chem Engn, Newark, DE 19716 USA Univ Delaware Newark DE USA 19716 e, Dept Chem Engn, Newark, DE 19716 USA
Titolo Testata:
JOURNAL OF MEMBRANE SCIENCE
fascicolo: 1, volume: 170, anno: 2000,
pagine: 101 - 112
SICI:
0376-7388(20000515)170:1<101:MOMPI>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
MICROFILTRATION; MORPHOLOGY;
Keywords:
liquid permeability and separations; membrane preparation and structure; microporous and porous membranes; membrane morphology; pore connectivity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
7
Recensione:
Indirizzi per estratti:
Indirizzo: Zydney, AL Univ Delaware, Dept Chem Engn, Newark, DE 19716 USA Univ Delaware Newark DE USA 19716 m Engn, Newark, DE 19716 USA
Citazione:
C.C. Ho e A.L. Zydney, "Measurement of membrane pore interconnectivity", J MEMBR SCI, 170(1), 2000, pp. 101-112

Abstract

Several studies have suggested that the rate and extent of membrane fouling can be strongly affected by the interconnectivity of the membrane port: 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. Wehave 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 surfacesof 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 withthe different formation methods and underlying pore morphologies for thesemembranes. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 12/07/20 alle ore 06:28:06