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Preparation and characterization of chitosan‐based dispersions
Authors:Cypriano G da Trindade Neto  Ana LP Fernandes  Ana IB Santos  Waldenice A Morais  Marcos VM Navarro  Tereza NC Dantas  Mrcia R Pereira  Jos LC Fonseca
Affiliation:Cypriano G da Trindade Neto,Ana LP Fernandes,Ana IB Santos,Waldenice A Morais,Marcos VM Navarro,Tereza NC Dantas,Márcia R Pereira,José LC Fonseca
Abstract:Complexation of chitosan in aqueous solutions by low molecular weight electrolytes is one of the simplest methods for the preparation of aqueous chitosan dispersions. In this work, the influence of storage time, sulfate concentration, method of preparation and surfactant content on some properties of the resultant chitosan dispersions (turbidity, viscosity and zeta potential) was analyzed. Turbidimetry was adequate to monitor the formation of particles, while viscometry was suitable to monitor changes in the dispersing phase. An analysis of the properties of these systems, mainly in terms of particle–particle and macromolecule–macromolecule interactions was carried out. Copyright © 2004 Society of Chemical Industry
Keywords:chitosan  particles  zeta potential  controlled release
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