GEL FORMATION IN THE KAOLIN SYSTEM - SODIUM ALGINATE - CALCIUM SULFATE - SODIUM PYROPHOSPHATE
- A.L. Vereshchagin, E.A. Kukarina, E.V. Greshnych
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.