Please use this identifier to cite or link to this item:
Title: The ionic liquid [EMIM]OAc as a solvent to fabricate stable polybenzimidazole membranes for organic solvent nanofiltration
Authors: Xing, D.Y.
Chan, S.Y. 
Chung, T.-S. 
Issue Date: Mar-2014
Citation: Xing, D.Y., Chan, S.Y., Chung, T.-S. (2014-03). The ionic liquid [EMIM]OAc as a solvent to fabricate stable polybenzimidazole membranes for organic solvent nanofiltration. Green Chemistry 16 (3) : 1383-1392. ScholarBank@NUS Repository.
Abstract: We have provided two feasible methods to prepare stable organic solvent nanofiltration (OSN) membranes by chemically cross-linking the polybenzimidazole (PBI) membranes fabricated from environmentally benign ionic liquids for the first time. A glutaraldehyde (GA)-water solution and a 1,2,7,8-diepoxyoctane (DEO)-n-heptane solution were employed to cross-link PBI membranes. The effects of these cross-linking agents on membrane stability and separation performance toward various solvents, including polar aprotic solvents, have been carefully examined. The GA cross-linking method, with little consumption of traditional organic solvents and energy, yielded a PBI membrane with a high and steady ethanol flux [3.69 L (m2 bar h)-1] and ethyl acetate flux [5.21 L (m2 bar h)-1]. Although PBI membranes cross-linked by DEO showed lower ethanol and ethyl acetate fluxes, they displayed impressive stability in aggressive solvents such as dimethyl sulfoxide (DMSO), N-methyl-2-pyrrolidinone (NMP) and N,N-dimethylacetamide (DMAc). Overall, PBI membranes cross-linked by both agents exhibited reasonable rejections which varied slightly from solvent to solvent due to different solute-solvent-membrane interactions. This study not only offers a new range of membrane materials and fabrication approaches for OSN, but will also enhance membrane-based green technology for the recovery of organic solvents. © 2014 The Royal Society of Chemistry.
Source Title: Green Chemistry
ISSN: 14639262
DOI: 10.1039/c3gc41634h
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Feb 18, 2019


checked on Feb 18, 2019

Page view(s)

checked on Jan 25, 2019

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.