Rheological behavior of alginate-lignosulfonate blend solutions

摘要

The rheological properties of polymer solutions can be decisive for the development of new materials with improved properties, for various applications, by bringing essential information about the viscoelastic response and processability conditions. Alginate-lignosulfonate blend solutions prepared in different mixing ratios with the aim to obtain thin films were investigated in terms of rheological behavior. Alginate and lignin derivatives are biodegradable and non-toxic biopolymers based on renewable resources that can be used in food, cosmetics, medical and pharmaceutical applications. Steady shear and dynamic oscillatory measurements were performed at room temperature in order to assess the influence of blend solutions composition on their flow behavior and viscoelastic response. The rheology measurements revealed the viscosity decrease occurred as lignosulfonate was added in blends composition, which exhibited non-Newtonian shear thinning behavior.