Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.ces.2006.04.031
Title: Chemically modified polybenzimidazole nanofiltration membrane for the separation of electrolytes and cephalexin
Authors: Wang, K.Y. 
Xiao, Y. 
Chung, T.-S. 
Keywords: Cephalexin
Membrane separation
Modification
Nanofiltration
Polybenzimidazole
Issue Date: Sep-2006
Source: Wang, K.Y., Xiao, Y., Chung, T.-S. (2006-09). Chemically modified polybenzimidazole nanofiltration membrane for the separation of electrolytes and cephalexin. Chemical Engineering Science 61 (17) : 5807-5817. ScholarBank@NUS Repository. https://doi.org/10.1016/j.ces.2006.04.031
Abstract: A novel chemical modification process has been proposed to prepare polybenzimidazole (PBI) nanofiltration membrane with desirable pore sizes and pore-size distribution. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analysis have verified the proposed chemical modification reaction between the PBI membrane and p-xylylene dichloride. Depending on the post-treatment process in the p-xylylene dichloride/heptane solution, one can finely control the pure water permeability of the modified membrane. The modified PBI membranes have a decreased effective mean pore size, a narrowed pore size distribution, and demonstrate superior ion rejection performance for liquid separation, especially for the fractionation of multivalent cations and anions from monovalent ions. It is also found that the charge characteristics of PBI membrane may vary with the solution pH, which is reflected by the rejection of NaCl under different pH. Particularly, this modified PBI NF membrane can be employed for the separation and concentration of cephalexin with impressive high rejection rates under a wide range of pH. © 2006 Elsevier Ltd. All rights reserved.
Source Title: Chemical Engineering Science
URI: http://scholarbank.nus.edu.sg/handle/10635/63587
ISSN: 00092509
DOI: 10.1016/j.ces.2006.04.031
Appears in Collections:Staff Publications

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

SCOPUSTM   
Citations

74
checked on Dec 5, 2017

WEB OF SCIENCETM
Citations

64
checked on Nov 16, 2017

Page view(s)

47
checked on Dec 10, 2017

Google ScholarTM

Check

Altmetric


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