Layer-by-Layer Assembly of Polyelectrolyte Films: Membrane and Catalyst Applications
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Polyelectrolyte multilayers prepared upon alternate electrostatic adsorption of positively and negatively charged polymers have recently shown promise as membranes and catalysts. Recent progress in the preparation of membranes for gas separation, separation of liquid mixtures under pervaporation conditions, ion separation under dialysis conditions, salt transport under nanofiltration (NF) and reverse osmosis conditions, separation of enantiomers, and others have been reported. The purpose of this article is to summarize recent activities in the field of membrane and catalyst applications of polyelectrolyte multilayer assemblies. It describes the use of polyelectrolyte multilayers as carriers for catalysts and biocatalysts, and then covers examples of catalyzed reactions such as enzyme reactions, photocatalytic reactions, and metal-catalyzed processes.