Desenvolvimento e avaliação de emulsões contendo cristais líquidos à base de óleo de rosa mosqueta
The interest in the knowledge of skin alterations caused by aging requires continuous studies and multidisciplinary research related to cosmetology and related areas, in order to improve techniques and products with rejuvenating, moisturizing, photo-protective and antioxidant activities. With the ad...
| Autor principal: | Sá, Bianca Muniz Silva de |
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| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2022
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/28811 |
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| Resumo: |
The interest in the knowledge of skin alterations caused by aging requires continuous studies and multidisciplinary research related to cosmetology and related areas, in order to improve techniques and products with rejuvenating, moisturizing, photo-protective and antioxidant activities. With the advance of technology and the increase in the population, new needs have been associated with the function of these products, aiming to ensure the well-being and beauty of the skin. In this scenario, moisturizing cosmetic emulsions are extremely important for the maintenance of skin health. Among the existing emulsions, the emulsions containing liquid crystals stand out. In this context, this work aimed to develop O/W emulsions containing liquid-crystalline phases, to evaluate these structures by microscopy, and to study the stability of emulsions that have them. The experiments were performed for two samples studied, the emulsion containing Rose Hip Oil, Crodafos CES® and distilled water (RMC) and the emulsion containing the same components plus the silicone additive PEG-12 Dimethicone (RMCS). The formulations showed lamellar liquid-crystalline phases, this presence being more evident in the additive emulsion. Both samples remained stable throughout the centrifugation process and the emulsion without the additive showed higher temperature resistance. Furthermore, both emulsions exhibited an acidic character during the pH tests. The kinematic viscosity values of the emulsions with the additivation (112.54; 89.60; 55.14; 190.06 mm2 s-¹) at day 1st, 7th, 15th, and 30th, respectively, were always higher than the values of the emulsion without the additivation (55.67; 30.99; 49.71; 46.04 mm2 s-¹). With this, it was determined that the emulsions have non-Newtonian flow with high viscosity values due to the formation of liquid crystals and according to the literature presented the lamellar phase demonstrates pseudoplastic rheology. |
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