Interesting behavior for filtration of macromolecules through EVAL membranes

doi:10.1016/S0032-3861(99)00149-4

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Title:	Interesting behavior for filtration of macromolecules through EVAL membranes
Authors:	Young, Tai-horng;鄭廖平;Cheng, Liao-ping;Lin, H. Y.
Contributors:	淡江大學化學工程與材料工程學系
Keywords:	EVAL;Asymmetric membranes;Particulate membranes
Date:	2000-01
Issue Date:	2010-03-09 10:04:16 (UTC+8)
Publisher:	Elsevier
Abstract:	The objective of this article is to investigate the permeation characteristics of several polydispersed macromolecules through the asymmetric and the particulate poly (ethylene-co-vinyl alcohol) (EVAL) membranes. The solutes in examination include two nonionic solutes, dextran and polyethylene glycol (PEG), and one anionic solute, sodium polyacrylate (SPA). The ultrafiltration results indicate that the rejection coefficients increase monotonically with the molecular weights of test solutes permeating through the asymmetric EVAL membranes. This is consistent with the behavior of normal commercial ultrafiltration membranes. For the particulate membranes, the rejection curves show different trends. In most cases, there exist two local minima in the rejection curves, having the shape of “W”. This unusual behavior is found to be associated with the dual-pore character of the particulate membrane. To this context, a parallel composite membrane model is proposed to explain this specific rejection in terms of rejection coefficients for the small and the large pores.
Relation:	Polymer 41(1), pp.377-383
DOI:	10.1016/S0032-3861(99)00149-4
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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