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pH-Dependent Dye Adsorption and Release Behaviors of Poly(ethylene-alt-maleic anhydride)/poly(4-vinyl pyridine) Multiplayer Films  

Hong, Sook-Young (Department of Advanced Polymer and Fiber Materials, College of Environment and Applied Chemistry Kyung Hee University)
Lee, Joon-Youl (Department of Advanced Polymer and Fiber Materials, College of Environment and Applied Chemistry Kyung Hee University)
Publication Information
Polymer(Korea) / v.29, no.6, 2005 , pp. 593-598 More about this Journal
Abstract
This work studied the loading capabilities and release behaviors of poly(ethylene-alt-maleic anhydride) (PEMAh)/poly(4-vinyl pyridine) (P4VP) multilayer films formed by the layer-by-layer(LbL) sequential self-assembly method, using Rodamine 6G(R6G) as an indicator. Thickness of the multilayer, and loading and subsequent release behavior of R6G from the multilayer were studied using UV-visible spectroscopy. The amount of R6G loaded in multilayer film increased linearly with increasing film thickness. pH-Sensitive permeability was observed, where lower pH environments increased both release rate and release amount. By additional assembling of PEMAh/poly(ethyleneimine) (PEI) capping layers on top of (PEMAh/P4VP)n multilayers, the release of R6G was better controlled.
Keywords
layer-by-layer; self-assembly; polyelectrolyte multilayer; pH- sensitive permeabilit;
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