Novel high performance hollow fiber ultrafiltration membranes spun from LiBr doped solutions

Idris, A. and Ahmed, I. and Misran, M. (2009) Novel high performance hollow fiber ultrafiltration membranes spun from LiBr doped solutions. Desalination, 249 (2). pp. 541-548. ISSN 0011-9164 , DOI

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The objective of this research is to evaluate the performance of the polyethersulfone (PES) hollow fiber ultrafiltration membranes spun from LiBr doped solutions prepared using the newly developed microwave heating technique. In addition the resultant hollow fiber membranes were introduced to a new post-treatment method where the membranes were placed in water and irradiated using the microwave technique. Various concentrations of the additive, LiBr, (1-4 wt.) were added into the PES dope solutions. The dissolution of PES and LiBr in DMF was facilitated by the microwave heating technique. The performance of the membranes was evaluated in terms of pure water permeation and polyethylene glycol separation and its molecular weight cutoff (MWCO) was determined. The results revealed that the microwave post-treatment technique was proven to be effective in producing higher performance membranes. The best performance was obtained at 3 LiBr with MWCO at 90 rejection in the range of 2.83 kDa and high flux range of 222.18 (Lm- 2 h- 1 bar- 1). LiBr interacts in the membrane matrix resulting in the enhancement of the hydrophilic property of the membrane and this is confirmed by the contact angle measurement.

Item Type: Article
Uncontrolled Keywords: Lithium bromide Microwave heating Polyethersulfone membranes Post-treatment Dope solution High flux Hollow fiber Hollow fiber membranes Hydrophilic properties Membrane matrix Microwave technique Molecular weight cutoff Polyethersulfone membrane Polyethersulfones Post treatment Post-treatment method Pure water Angle measurement Contact angle Dissolution Heating Lithium Microwaves Polyethylene glycols Polyethylene oxides Potential energy Potential energy surfaces Spinning (fibers) Ultrafiltration Membranes aqueous solution bromide concentration (composition) membrane performance assessment polymer separation water treatment
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Department of Chemistry
Depositing User: miss munirah saadom
Date Deposited: 08 Jul 2013 07:44
Last Modified: 23 Sep 2013 01:24

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