INVESTIGATION OF COLLOIDAL AND CHEMICAL PROPERTIES OF "GREEN" SURFACTANTS IN COSMETICS
Rubrics: 1. CHEMISTRY
Authors:
1.
KNITU
2.
Kazan National Research Technological University
Russian Federation
Russian Federation
3.
Kazan National Research Technological University
4.
Kazan National Research Technological University
(physical and colloid chemistry department, professor)
employee from 01.01.1971 until now
employee from 01.01.1971 until now
Type:
Article
Pages:
from 31
to 36
Status:
Published
Received:
04.08.2025
Accepted:
07.08.2025
Published:
07.08.2025
Language:
Russian
Keywords:
"GREEN" SURFACTANTS, COCO - GLUCOSIDE, SODIUM COCO-SULFATE, SODIUM LAUROYL OAT AMINO ACIDS, SODIUM COCOYL APPLE AMINO ACIDS, WETTING, SURFACE TENSION
Abstract (English):
"Green" surfactants are natural components obtained from natural sources, which are then subjected to certain chemical treatment for use in the cosmetic and food industries. The most common "green" surfactants are: cocoglucoside, sodium cocosulfate, oat and apple surfactants. In this article were studed their physicochemical properties. It is known that these substances have a mild cleansing effect, do not destroy the natural lipid barrier of the skin, form a soft foam, and are suitable for sensitive skin. In the course of the work, the following colloidal chemical indicators were studied for the selected substances: surface tension, wetting, foaming ability, foam stability, and hydrogen index pH. The dependence of these parameters on the concentrations of surfactant solutions is shown. It was found that with an increase in the concentration of surfactants, the surface tension of their aqueous solutions decreases and the wetting ability increases. The studies showed that all surfactants except coco-glucoside effectively reduce surface tension, and the best wetting is achieved with oat surfactant. The surfaces of polytetrafluoroethylene and gelatin were selected for the wetting study. Due to the fact that polytetrafluoroethylene is positioned as the lowest-energy surface due to the presence of fluorine-containing groups -CF2- in the surface layer, and gelatin is used to simulate the skin surface. It was determined that the gelatin surface is well wetted by all surfactants, and for polytetrafluoroethylene, a transition to positive values of the contact angle cosine is observed. When determining the pH of aqueous solutions of the studied surfactants, it was found that the pH value of the oat surfactant was the closest hydrogen index to that of skin. Thus, the studied surfactants can be effective wetting agents and foaming agents (except apple surfactant), which allows them to be used in foaming detergents and cosmetics.
"Green" surfactants are natural components obtained from natural sources, which are then subjected to certain chemical treatment for use in the cosmetic and food industries. The most common "green" surfactants are: cocoglucoside, sodium cocosulfate, oat and apple surfactants. In this article were studed their physicochemical properties. It is known that these substances have a mild cleansing effect, do not destroy the natural lipid barrier of the skin, form a soft foam, and are suitable for sensitive skin. In the course of the work, the following colloidal chemical indicators were studied for the selected substances: surface tension, wetting, foaming ability, foam stability, and hydrogen index pH. The dependence of these parameters on the concentrations of surfactant solutions is shown. It was found that with an increase in the concentration of surfactants, the surface tension of their aqueous solutions decreases and the wetting ability increases. The studies showed that all surfactants except coco-glucoside effectively reduce surface tension, and the best wetting is achieved with oat surfactant. The surfaces of polytetrafluoroethylene and gelatin were selected for the wetting study. Due to the fact that polytetrafluoroethylene is positioned as the lowest-energy surface due to the presence of fluorine-containing groups -CF2- in the surface layer, and gelatin is used to simulate the skin surface. It was determined that the gelatin surface is well wetted by all surfactants, and for polytetrafluoroethylene, a transition to positive values of the contact angle cosine is observed. When determining the pH of aqueous solutions of the studied surfactants, it was found that the pH value of the oat surfactant was the closest hydrogen index to that of skin. Thus, the studied surfactants can be effective wetting agents and foaming agents (except apple surfactant), which allows them to be used in foaming detergents and cosmetics.
Keywords:
"GREEN" SURFACTANTS, COCO - GLUCOSIDE, SODIUM COCO-SULFATE, SODIUM LAUROYL OAT AMINO ACIDS, SODIUM COCOYL APPLE AMINO ACIDS, WETTING, SURFACE TENSION
"GREEN" SURFACTANTS, COCO - GLUCOSIDE, SODIUM COCO-SULFATE, SODIUM LAUROYL OAT AMINO ACIDS, SODIUM COCOYL APPLE AMINO ACIDS, WETTING, SURFACE TENSION
