Use of graft-modified membranes for water treatment

Membranes with designed surface and filtration properties were prepared by grafting and adsorption of polyelectrolyte multilayer systems on membrane surfaces using the layer-by-layer electrostatic self-assembly technique. Microfiltration membranes with a first polyelectrolyte layer grafted onto the...

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Bibliographic Details
Published in:Water science & technology. Water supply 2003, Vol.3 (5-6), p.385-392
Main Authors: Meier-Haack, J, Carroll, T
Format: Article
Language:English
Subjects:
Adsorption
Filtration
Grafting
Membranes
Microfiltration
Polyelectrolytes
Protein adsorption
Proteins
Self-assembly
Surface chemistry
Surface stability
Water purification
Water treatment
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Description
Summary:Membranes with designed surface and filtration properties were prepared by grafting and adsorption of polyelectrolyte multilayer systems on membrane surfaces using the layer-by-layer electrostatic self-assembly technique. Microfiltration membranes with a first polyelectrolyte layer grafted onto the surface showed excellent stability during the filtration process. Although a two-fold higher permeate flux was observed for a three-layer polyelectrolyte complex membrane compared to a just grafted one, the protein retention did not change remarkably. Additionally, a reduced protein adsorption was detected by in-situ ATRFTIR spectroscopy for the case of repulsive electrostatic forces between the substrate and the protein under applied test conditions.
ISSN:1606-9749
1607-0798
DOI:10.2166/ws.2003.0193