Получаване на полиелектролитни комплекси от хитозан и казеин
Polyelectrolyte Complex Formation of Chtosan and Casein

Summary/Abstract: In the recent decades, intensive studies have been performed on the interactions between polyelectrolytes and the possibilities for polyelectrolyte complex (PEC) formation. The main purpose of these studies is to investigate the properties of PECs and to extend their application in solving different technological and environmental problems. The interest in natural polyelectrolytes - polysaccharides, proteins, amino acids, DNA, etc., has been increased due to their role in living organisms, their bioavailability, biodegradability and uses in pharmacy and medicine. In the present study attractive, electrostatic interactions between oppositely charged polyelectrolytes have been used to prepare a novel complex between a polyampholyte casein and a natural polycation — chitosan. The complex casein/chitosan is formed during the mixing of acid chitosan solutions and basic casein solutions. The complex yield was investigated by viscometric, spectroscopic and gravimetric methods. The optimum stoichiometry of the complexes at different pH has been determined.

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