Chitosan-Aluminum Monostearate Composite Dispersion Characteristics

Abstract:

Fatty acids have been used as additive for modifying chitosan-based system particularly in hydrophobic manner. Generally, techniques for preparing chitosan-fatty acid conjugate system are take time, involved with high temperature and high shear force and need some surfactants. In this study, alternative technique for simply blending chitosan with fatty acid was performed by taking advantage of ionization of metal stearate and chitosan in acidic condition. Metal stearate used in this study, aluminum monostearate (Alst), was dispersed in chitosan dissolved in lactate buffer solution pH 4.5 with various concentrations of chitosan. Physicochemical properties such as pH value, viscosity and rheology, morphology and particle size of the dispersions were characterized. The pH value and viscosity of the chitosan solutions was higher as the chitosan concentration was increased. For the dispersions, their pH value was not changed by mixing time but their viscosity was decreased by mixing time. All dispersions exhibited Newtonian flow behavior. Larger mean particle size of the dispersions was observed when the mixing time was longer. At higher chitosan concentration, mean particle size of the aggregated chitosan-stearate particles was smaller than the lower chiotsan concentration systems

• Periodical: Advanced Materials Research (Volume 528)
• Pages: 233-236
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.528.233
• Online since: June 2012
• Authors: Kotchamon Yodkhum, Thawatchai Phaechamud
• Keywords: Aluminum Monostearate, Characteristic, Chitosan, Composite Dispersion

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