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Characteristics of the nanofiltration composite membranes based on PVA and sodium alginate
Author(s) -
Jegal Jonggeon,
Oh NamWun,
Park DuckSoon,
Lee KewHo
Publication year - 2001
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20010328)79:13<2471::aid-app1055>3.0.co;2-k
Subject(s) - polysulfone , membrane , nanofiltration , permeation , polyamide , vinyl alcohol , aqueous solution , chemical engineering , polymer chemistry , materials science , microporous material , interfacial polymerization , sodium dodecylbenzenesulfonate , nuclear chemistry , chemistry , monomer , polymer , organic chemistry , composite material , biochemistry , engineering
Chemically stable nanofiltration (NF) composite membranes based on poly(vinyl alcohol) (PVA) and sodium alginate (SA) (hereafter, these membranes are called PVA/SA composite membranes) were prepared by coating microporous polysulfone (PSF) supports with dilute PVA/SA blend solutions. The PSF supports were pretreated with small monomeric compounds to reduce their pore size and to improve their hydrophilicity before coating with the PVA/SA blend solutions. The concentration of the PVA/SA blend solutions ranged from 0.1 to 0.3 wt %. The membranes prepared in this study were characterized with various methods such as SEM, FTIR, permeation tests, and z ‐potential measurements. Especially, chemical stabilities of the membranes were tested, using three aqueous solutions with different pHs such as a HCl solution (pH 1), a K 2 CO 3 solution (pH 12.5), and a NaOH solution (pH 13). Their chemical stabilities were compared with that of a polyamide (PA) composite membrane prepared from piperazine (PIP) and trimesoyl chloride (TMC). In this study, it was found that the PVA/SA composite membranes prepared showed not only good chemical stabilities but also good permeation performances in the range from pH 1 to 13. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 79: 2471–2479, 2001