Изучение свойств растворов и пленок на основе композиций полисахаридов : дипломная работа / Готина Е. А.; Белорусский государственный университет, химический факультет, кафедра физической химии; науч. рук. Савицкая Т. А.

Abstract

The paper deals with the use of the compositions of polysaccharides to obtain biodegradable, edible films. The relationship between rheological properties of corn starch, sodium alginate and agar-agar solutions and gels and the structure of given solutions is investigated. Based on viscosity rheograms, calculations of activation energy of viscous flow and calculations of Ostwald de Villa, Herschel- Buckley Casson and Bingman rheological model coefficients conclusions were made consuring the accordance of the systems flow to the power law. Anomalous behavior of cornstarch mixture with sodium alginate in amounts of small additives (2% mass.) was observed. The influence of solution compostion, casting and drying conditions on the mechanical properties of the films was investigated. Also studied was the stability of the mechanical properties of films during storage. An estimation of the solubility, moisture permeability and stability of mechanical properties during storage of the films was made. On the basis of this work were made edible packaging materials suitable for storage of dry products: cereals, porridge, pasta, tea, coffee, etc., as well as an article Rheological Properties of Casting Solutions for Starch Edible Films Production in the journal Open Journal of Fluid Dynamics 2015 V.5 P.58-67 was published.