Lidija Slemenik, Miha Žumer

University of Ljubljana, Faculty of Chemistry and Chemical Technology,
Aškerčeva 5, SI-1000 Ljubljana, Slovenia
 
 

ABSTRACT

Measurements of mixing times for water-based polysaccharide systems were carried out in two flat-bottomed cylindrical plexiglass vessels. Vessels had different dimensions and were equipped with various impellers. Helical ribbon impeller was used for mixing polysaccharide systems with higher viscosity. Mixing times were determined with thermal response technique and compared with flow visualisation method. Rheological examinations were performed by using controlled stress and controlled rate rheometer. Rheological behaviour of polysaccharide systems was investigated under steady and oscillatory shear conditions at different temperatures.