Banca de DEFESA: FERNANDA MARIA DE PAULA MIRANDA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : FERNANDA MARIA DE PAULA MIRANDA
DATE: 28/09/2023
TIME: 15:00
LOCAL: campus gameleira
TITLE:

RELATIONSHIP BETWEEN PHYSICAL AND CHEMICAL PROPERTIES AND THE STABILITY OF BASE EMULSIONS FOR APPLICATION IN NATURAL HAIR COSMETICS.

KEY WORDS:

Natural cosmetics; emulsion stability; jojoba oil; PPI

PAGES: 129
BIG AREA: Outra
AREA: Multidisciplinar
SUMMARY:

The large amount of information available about environmental and health issues leads consumers to increasingly question the composition of the cosmetics they use and look for natural products with high performance. Hair cosmetics are among the most popular and the most widely used are shampoos and conditioners. A shampoo formulation is usually composed of a combination of surfactants that promote cleaning, foam and ingredients that bring softness and shine to the hair. Conditioners are generally composed of cationic surfactants, silicones, cationic polymers and/or lipids that makes the hair easier to comb. In this work the stability of emulsions using jojoba oil was evaluated focusing on the production of alternative hair care products. Jojoba oil is rich in antioxidants and has a composition close to the skin’s natural sebum, providing interesting properties to the formulation and reducing the irritating potential. The use of pea protein isolate (PPI) was also evaluated. This protein widely used in the food industry to stabilize emulsions. Base emulsions for shampoos and conditioners containing natural surfactants and semi-natural co-surfactant was formulated. The most stable formulations were selected by performing central composite design. Tensiometry analyses showed that PPI is capable of reducing the surface tension of water from 72.4mN/m to 45.9mN/m and 43.2mN/m in the proportion used for shampoo and conditioner respectively. The shampoo emulsion, which contained 5% oil and 1% PPI, showed creaming phenomenon in the stability teste at 5, 25, 45 and 65ºC (Turbsican®) and, watching the stability in the bench test at 25°C, there was a 4% separation in 4hs. The viscosity value obtained was 34.25cP, suggesting the need of a viscosity agent in the formula to obtain a commercial product. The presence of the co-surfactant cocoamidopropil betaine provided better foamability to the shampoo base. The emulsion for conditioners in the same concentration of oil and PPI proved to be quite stable in the stability tests using Turbsican® and, watching the stability in the bench test, there was no detectable separation for more than 24 hours. The viscosity value obtained was 13527cP, considered suitable for the product.

COMMITTEE MEMBERS:
Interna - PATRICIA SUELI DE REZENDE
Interna - RAQUEL VIEIRA MAMBRINI
Externo à Instituição - JOAO VICTOR NICOLINI