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Separations
Dynamic pressure-driven covalent assembly of inner skin hollow fiber multilayer membrane
Article first published online: 29 DEC 2010
DOI: 10.1002/aic.12481
Copyright © 2010 American Institute of Chemical Engineers (AIChE)
Additional Information
How to Cite
Zhang, G., Dai, L. and Ji, S. (2011), Dynamic pressure-driven covalent assembly of inner skin hollow fiber multilayer membrane. AIChE J., 57: 2746–2754. doi: 10.1002/aic.12481
Publication History
- Issue published online: 9 SEP 2011
- Article first published online: 29 DEC 2010
- Accepted manuscript online: 2 NOV 2010 02:47PM EST
- Manuscript Revised: 23 OCT 2010
- Manuscript Received: 5 OCT 2010
Funded by
- Scientific Research Common Program of Beijing Municipal Commission of Education. Grant Number: KM201010005016
- Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality. Grant Number: PHR201008018
- Program for Beijing Excellent Talents. Grant Number: 2009D005015000013
- National Natural Science Foundation of China. Grant Number: 20806001
- National Basic Research Program of China. Grant Number: 2009CB623404
- Abstract
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Keywords:
- covalent assembly;
- dynamic pressure-driven layer-by-layer technique;
- hollow fiber;
- glutaraldehyde;
- pervaporation
Abstract
A covalent assembly was accomplished onto hollow fibers via a dynamic pressure-driven layer-by-layer (LbL) technique. The covalent crosslinking multilayers were successfully formed onto the inner surfaces of hollow fiber porous substrates during the alternatively filtration of polyethyleneimine (PEI) and glutaraldehyde (GA) solutions. The formation of covalent bond between PEI and GA was confirmed using fourier transform infrared (FTIR) spectra. The thickness increment on a quartz slide clearly suggested the stepwise growth of multilayer at nanometer scale. The regular alternation of zeta potentials demonstrated that the successful formation of GA-crosslinked PEI multilayers on the hollow fibers. The multilayer membranes showed excellent pervaporation performances for the dehydration of different solvent–water mixtures. The selectivity and permeability can be controlled by varying the PEI layer number. More importantly, the covalent assembled multilayer membrane rendered much higher stabilities compared with those from electrostatically LbL assembly, which offers much opportunity for practical applications. © 2010 American Institute of Chemical Engineers AIChE J, 2011