BEH.462/3. 962J Molecular Principles of Biomaterials Spring 2003 o Microstructure of coacervate hydrogels o Example structures: xanthan/chitosan coacervates(Dumitriu et al. 1998) Xanthan Chitosan omani poly o-H NH2 CH2OH SEM o Pore sizes formed 0. 1-1 um; fiber diameters -100 nm Polyelectrolyte multilayers(PEMs Structure of pems Assembly ayer-by-layer deposition o How is it done o Surface properties change in digital fashion with adsorption of sequential layers Lecture 9-polyelectrolyte hydrogels 5of17BEH.462/3.962J Molecular Principles of Biomaterials Spring 2003 o Microstructure of coacervate hydrogels o Example structures: xanthan/chitosan coacervates (Dumitriu et al. 1998) o Pore sizes formed 0.1-1 µm; fiber diameters ~100 nm Polyelectrolyte multilayers (PEMs) Structure of PEMs Assembly • Layer-by-layer deposition o How is it done o Surface properties change in digital fashion with adsorption of sequential layers5 Lecture 9 – polyelectrolyte hydrogels 5 of 17