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Functionalized assembly of solid membranes for chiral separation using polyelectrolytes and chiral ionic liquid
Author(s) -
Meng Hong,
Li Sumin,
Xiao Ling,
Li Chunxi
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.14227
Subject(s) - polyelectrolyte , membrane , enantiomer , chemical engineering , ionic liquid , polymer , chemistry , layer (electronics) , materials science , polymer chemistry , chromatography , organic chemistry , catalysis , engineering , biochemistry
The successful assembly of a new solid membrane for chiral separation, assembled via the formation of complexes of a polyelectrolyte and β‐cyclodextrins chiral ionic liquid (β‐CD‐IL) is presented. Before the assembly, the β‐CD‐IL, used as a chiral selector, was synthesized and characterized by 1 H NMR. To tune the chiral separation capability of the solid membrane, β‐CD‐IL was subsequently immobilized on to porous supporting membranes through layer‐by‐layer assembly of the β‐CD‐IL and polyelectrolytes. The resulting membrane was used in the chiral separation of D, L‐tryptophan racemate enantiomer. The membrane structure and surface morphologies were systematically analyzed by FT‐IR, UV–vis, SEM and AFM. The effects of layer number on the chiral separation were investigated. It was found that the more β‐CD‐IL was immobilized on the membranes; the higher average separation factor could be obtained. The stability of the multilayer membrane was improved by coating with crosslinked polymer layer. © 2013 American Institute of Chemical Engineers AIChE J , 59: 4772–4779, 2013