Electrokinetic and surface charge characteristics of microporous membranes used in aqueous filtration

Persistent Link:
http://hdl.handle.net/10150/278066
Title:
Electrokinetic and surface charge characteristics of microporous membranes used in aqueous filtration
Author:
Jan, Der-E, 1961-
Issue Date:
1991
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The electrical characteristics of nylon 66, charge-modified nylon 66 and PVDF filter membranes were investigated using the electrophoretic and streaming potential techniques. Characterization of surface charge density of nylon based membranes were performed by acid/base titration. The adsorption of an anionic dye was used to determine the charge density of positive sites on the N66 Posidyne membrane. The results show that the isoelectric point (IEP) of N66 Posidyne and Zetapor (E-grade) occurred at pH 7.6 and 6.2, respectively. The point of zero charge (PZC) of E-grade Zetapor occurred at a much higher pH value than the IEP, indicating inhomogeneity in the extent of charge modification in pore walls and on the external surface. Using the dye adsorption test, the charge density of positive sites on N66 Posidyne was calculated to be approximately 9.5 μcoulombs/cm² at a solution of pH of 5.1, which is in agreement with the surface charge density using the acid/base titration.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Engineering, Materials Science.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College
Degree Grantor:
University of Arizona
Advisor:
Raghavan, Srini

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleElectrokinetic and surface charge characteristics of microporous membranes used in aqueous filtrationen_US
dc.creatorJan, Der-E, 1961-en_US
dc.contributor.authorJan, Der-E, 1961-en_US
dc.date.issued1991en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe electrical characteristics of nylon 66, charge-modified nylon 66 and PVDF filter membranes were investigated using the electrophoretic and streaming potential techniques. Characterization of surface charge density of nylon based membranes were performed by acid/base titration. The adsorption of an anionic dye was used to determine the charge density of positive sites on the N66 Posidyne membrane. The results show that the isoelectric point (IEP) of N66 Posidyne and Zetapor (E-grade) occurred at pH 7.6 and 6.2, respectively. The point of zero charge (PZC) of E-grade Zetapor occurred at a much higher pH value than the IEP, indicating inhomogeneity in the extent of charge modification in pore walls and on the external surface. Using the dye adsorption test, the charge density of positive sites on N66 Posidyne was calculated to be approximately 9.5 μcoulombs/cm² at a solution of pH of 5.1, which is in agreement with the surface charge density using the acid/base titration.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectEngineering, Materials Science.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorRaghavan, Srinien_US
dc.identifier.proquest1346744en_US
dc.identifier.bibrecord.b2728041xen_US
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