Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.memsci.2011.06.032
Title: Investigation of unique interactions between cellulose acetate and ionic liquid [EMIM]SCN, and their influences on hollow fiber ultrafiltration membranes
Authors: Xing, D.Y.
Peng, N. 
Chung, T.-S. 
Keywords: 1-Ethyl-3-methylimidazolium thiocyanate
Cellulose acetate
Hollow fiber
Ionic liquid
Rheology
Ultrafiltration
Issue Date: 15-Sep-2011
Citation: Xing, D.Y., Peng, N., Chung, T.-S. (2011-09-15). Investigation of unique interactions between cellulose acetate and ionic liquid [EMIM]SCN, and their influences on hollow fiber ultrafiltration membranes. Journal of Membrane Science 380 (1-2) : 87-97. ScholarBank@NUS Repository. https://doi.org/10.1016/j.memsci.2011.06.032
Abstract: This study investigates the molecular interactions between ionic liquid, 1-ethyl-3-methylimidazolium thiocyanate ([EMIM]SCN) and cellulose acetate (CA), employing not only experimental characterizations including FTIR and rheological tests, but also molecular dynamics simulations. Due to the electrostatic nature of ionic liquids, [EMIM]SCN interacts intensely with CA molecules through pronounced hydrogen bonding, Coulombic forces and van der Waals interactions, which play an important role in dissolving CA and also greatly contribute to the unique rheological characteristics of CA/[EMIM]SCN solutions. The competition between the charge-ordered structure and polymer chain entanglement in the CA/[EMIM]SCN solutions leads to a three-region flow curve under shear stress. The charge-ordered network in CA/[EMIM]SCN solutions as well as the affinity and unique solvent exchange characteristics between non-solvents and [EMIM]SCN are found to greatly influence the phase inversion paths of membranes. In addition, the effects of dope flow rate, dope temperature and air-gap distance on hollow fiber formation have been elucidated and correlated to the interactions between CA and [EMIM]SCN and the phase inversion mechanisms. By tuning the spinning conditions, CA hollow fiber membranes are successfully fabricated for ultrafiltration with a PWP value of 90.10 (L/m2barh) and a mean effective pore diameter of 16.68nm. © 2011 Elsevier B.V.
Source Title: Journal of Membrane Science
URI: http://scholarbank.nus.edu.sg/handle/10635/89289
ISSN: 03767388
DOI: 10.1016/j.memsci.2011.06.032
Appears in Collections:Staff Publications

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

SCOPUSTM   
Citations

49
checked on Sep 12, 2019

WEB OF SCIENCETM
Citations

46
checked on Sep 4, 2019

Page view(s)

99
checked on Sep 7, 2019

Google ScholarTM

Check

Altmetric


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