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Ruban AA*, Novikova (Zakharova) MV and Kostin AA
Russian Research Institute for Food Additives - Branch of V.M. Gorbatov Federal Research Center for Food Systems of RAS, Russia
*Corresponding Author: Ruban AA, Russian Research Institute for Food Additives - Branch of V.M. Gorbatov Federal Research Center for Food Systems of RAS, Russia.
March 09, 2022; Published: April 26, 2022
The Black Soldier Fly (Hermetia illucens) Larvae (BSFL) fat have similar composition and quality to coconut and palm oil, which makes it the one of promising alternative fat sources. In industry, fats and oils are usually used in the form of emulsions regardless of the application field. Emulsion is a dispersed system, which contains two immiscible liquids stabilized with an emulsifier. Effective viscosity is included in the main physical characteristic of liquids, which determines the behavior of the liquid during flow and affects the production, use and storage of emulsions. Lecithin is a natural emulsifier with high availability and safety, it can have a strong influence on rheological properties of emulsions. Therefore, the aim of the work was to determine the effective viscosity of lecithin solutions and BSFL fat emulsions, depending on the lecithin content (0.5 - 2.5 wt.%). It has been found that consistency indices of lecithin solutions increased with an increase of lecithin concentration from 0.5 to 2 wt.%. Moreover, 1-2 wt% lecithin solutions showed shear thinning behavior, but the increasing of the lecithin content to 2.5 wt% had changed the flow behavior to dilatant. The BSFL fat emulsions showed two times lower consistency compare to lecithin solutions with the same lecithin concentration.
Keywords: Effective Viscosity; Lecithin; Black Soldier Fly; BSFL; Insect Fat; Emulsion
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