STUDY OF THE RHEOLOGICAL PROPERTIES OF SOME ESSENTIAL OILS USED IN COSMETICS AND PHARMACEUTICALS

Abstract

The processing of various liquids used in industrial production is accompanied by complex physico­chemical, biological and mechanical processes, the detailed study of which allows the organization of objective control and management of the technological cycle of production. The rheological characteri­stics of cosmetics and pharmaceuticals fluids are important for production, packaging, filling, and storage. The course of these processes, the design parameters of the working bodies of the relevant machines and devices, as well as the quality of the products obtained to a significant extent depend on the rheological properties of the processed materials. The main processes in which the rheological properties of the processed materials should be most fully taken into account are forming, mixing and transportation. When studying the indicated processes, a relationship is established between the rheological characteristics of the material and the technological parameters of its processing. One of the most significant properties of conti­nuous media is viscosity. The article considers the main methods of measuring the viscosity of liquids with a rotational viscometer. This article presents results of a study of the rheological properties of essential oils /rose oil, lavender oil and peppermint oil/. Thermo Scientific HAAKE MARS iQ Rheometer Air-bearing was used to determine the dependences of viscosity change on temperature. Currently, in some reference materials, approximate values of the dynamic viscosity of essential oils can be found, but the exact numeri­cal values at different temperatures are missing. The results obtained have practical value in technological processes and the design of machines and mechanisms that use essential oils.