GEL FORMATION IN THE KAOLIN SYSTEM - SODIUM ALGINATE - CALCIUM SULFATE - SODIUM PYROPHOSPHATE

A.L. Vereshchagin, E.A. Kukarina, E.V. Greshnych
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Abstract: The results of studies of changes occurring during the formation of filled alginate gels during internal diffusion gelation are presented. The study was carried out for systems consisting of kaolin and sodium alginate with a curing system of calcium sulfate and sodium pyrophosphate. It has been established that the use of rheological research methods makes it possible to obtain data on the quality indicators of alginate gels and their composition, and the mechanism of gelation. It was found that for the system kaolinsodium alginate-calcium sulfate-sodium pyrophosphate when forming an alginate gel, it is advisable to use calcium sulfate with a mass fraction of 5 to 6.5, and sodium pyrophosphate with a mass fraction of 1.5 to 3% at a hydromodule 1 to 3 and a water temperature of 20 °C. This data can be used in the development of the formulation of alginate masks and the preparation of regulatory technical documentation.
Index terms: sodium alginate, kaolin, rheology, alginate gels, calcium sulfate, sodium pyrophosphate.

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