Precise tuning of salt retention of backwashable polyelectrolyte multilayer hollow fiber nanofiltration membranes

CATEGORY: NANOFILTRATION
Precise tuning of salt retention of backwashable polyelectrolyte multilayer hollow fiber nanofiltration membranes

Type	Journal Article
Author	Daniel Menne
Author	Johannes Kamp
URL	http://www.sciencedirect.com/science/article/pii/S0376738815302891
Volume	499
Pages	396-405
Publication	Journal of Membrane Science
Date	February 1, 2016
Abstract	Describes a novel dynamic Layer-by-Layer (LbL) fabrication method to molecularly engineer the layer build-up within the lumen of hollow fiber membrane involving constant flux permeation, rather than the conventional static adsorption method. During the constant flux coating, the polyelectrolyte concentration at the membrane surface rises continuously due to its rejection causing a convective adsorption process of the polyelectrolyte onto the membrane. The retained polyelectrolyte amount correlates with the flux and retention properties of the resulting polyelectrolyte multilayer membranes irrespective of time span or flux level used for the convection step. The method makes possible the synthesis of new desalination membranes with unprecedented precision on ion transport properties.