Modelling of the composition of emulsion medicines and cosmetics stabilized by a biocomplex of surfactant substances based on rhamnolipids Pseudomonas sp. PS-17

The aim. To study the biocomplex of surfactants based on rhamnolipids Pseudomonas sp. PS-17 (biocomplex PS) as an emulsifier and co-emulsifier by using the method of modelling the composition of emulsions for use in dermatology. Materials and methods. The biocomplex PS is a biogenic surface-active complex synthesized by bacteria of the genus Pseudomonas, which is a viscous mass that includes rhamnolipids, which make up to 80 % of the biocomplex, as well as alginate and water. The methods of computer simulation of semi-automated selection of the composition of the oil phase and emulsifiers of medicinal or cosmetic emulsions developed in the MO Excel program were used. In modelling processes, the biocomplex PS was studied as an independent emulsifier in o/w type emulsions, as well as a co-emulsifier of this type of emulsions in combination with type II emulsifiers. Results. The substantiation of the concentration of emulsifiers in the composition of emulsion medicinal and cosmetic products is mainly carried out based on experimental studies; therefore, it requires a long time and is expensive. To reduce the number of technological experiments in the development of emulsion products stabilized by a biocomplex of surfactants based on biocomplex PS, a method of computer simulation of the composition of emulsions in the MO Excel program was developed and used. A method based on the application of the hydrophilic-lipophilic balance system. Two examples of solving specific problems of choosing a complex emulsifier and the composition of the oil phase components of the emulsion product are given. Conclusions: The use of a semi-automated modelling system provides a reasoned choice of the composition of the oil phase of the emulsion when using the PS biocomplex as an independent emulsifier or the choice of the ratio between the PS biocomplex and the type II emulsifier when using a complex emulsifier and allows rational experimental study