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Permeation Properties of Surface Modified Nanofiltration Membrane  

Tak Tae-Moon (서울대학교 농업생명과학대학 생물자원공학부)
Park Hyung-Kiu (서울대학교 농업생명과학대학 생물자원공학부)
Jang Gyung-Gug (서울대학교 농업생명과학대학 생물자원공학부)
Publication Information
Membrane Journal / v.14, no.3, 2004 , pp. 207-217 More about this Journal
Abstract
In this study, we prepared nanofiltration membrane by applying the interfacial polymerization method as a way of manufacturing composite membranes. We have examined the effects of various preparation factors such as monomer concentration and composition, thermal curing condition, post treatment condition. In addition to preparation conditions, we also monitored the effects of operation conditions such as feed solution concentration and operation pressure on the permeation properties of the resulting nanofiltration membrane. We intended to increase the permeation rate of nanofiltration membrane by the enlargement of effective surface area using additives during interfacial polymerization step. With increasing the monomer concentration, membrane permeation rate are decreased with maintaining almost constant rejection. With respect to curing condition, with increasing the curing temperature both permeation rate and rejection are decreased. With increasing the ratio of MPD in amino monomer composition, permeation rate decreased drastically with high rejection. With increasing the feed solution concentration, both permeation rate and rejection decreased. Both permeation rates and rejection increased with increasing the operating pressure. Nanofiltration membrane have higher surface roughness with increasing additive concentration in the case of using MPD contained amine composition than using piperazine alone. Permeation rates are much lower than the nanofiltration membrane prepared by piperazine.
Keywords
thin film composite membrane; interfacial polymerization polysulfone; nanofiltration; additive; surface roughness;
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