OPTIMIZATION OF CONDITIONS FOR THE FORMATION OF STABLE GEL FROM AGAR-AGAR

Abstract

Red seaweed is an important raw material for obtaining a natural gelling agent, thickener and stabilizer – agar-agar. In the work, agar was isolated from dried red seaweed of the genus Porphyra. The high rheological and gel-forming properties of agar were shown. The dependence of the concentration of the agar solution on the gel-forming ability was obtained. The range of concentrations at which the formation of the gel occurs (1.0–10.0%). The choice of optimal conditions (concentration, temperature) for the production of films has been substantiated. The effect of the plasticizer on the quality of films is shown. A direct dependence of the change in the swelling of the film in water on time and temperature – objective characteristics for their use for practical purposes – has been established. The critical concentration of agar micello formation is 0.05%. At this concentration, the surface activity of agar is 27.1 mJm/kg. An improvement in the properties of textile materials coated with agar solution has been established. Problems that need to be solved with further research are shown.