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Covalent crosslinked assembly of tubular ceramic‐based multilayer nanofiltration membranes for dye desalination
Author(s) -
Wang Lu,
Wang Naixin,
Zhang Guojun,
Ji Shulan
Publication year - 2013
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14093
Subject(s) - nanofiltration , membrane , chemical engineering , glutaraldehyde , covalent bond , materials science , desalination , permeation , ceramic , microporous material , polymer chemistry , vinyl alcohol , composite number , composite material , chromatography , chemistry , organic chemistry , polymer , biochemistry , engineering
A tubular ceramic‐based multilayer composite nanofiltration membrane has been developed for dye desalination. Poly(acrylic acid)(PAA)/poly(vinyl alcohol)(PVA)/glutaraldehyde(GA) was dynamically assembled on to the inner surfaces of tubular ceramic microporous substrates which had been pretreated using dynasylan ameo silane coupling agents. Subsequently, the composite membranes were thermally crosslinked to form covalent ester bonds. Experimental results proved that the composite membrane had good nanofiltration performance for dye desalination. The (GA/PVA/PAA) 3 /ceramic multilayer membrane shows over 96% retention of Congo red and less than 3% NaCl retention using a permeate flux of about 25 L/(m 2 ·h). An investigation of membrane performance as a function of operating conditions suggested that the covalent crosslinking multilayer membrane possessed much higher stability compared to other, electrostatically assembled, multilayer membranes. © 2013 American Institute of Chemical Engineers AIChE J , 59: 3834–3842, 2013