Photoprotective Cosmetic Emulsions Based on Brazilian Smectite Clays

Rafaella Resende de Almeida Duarte, Taynah Pereira Galdino, Alisson Mendes Rodrigues (), Marcus Vinicius Lia Fook, Gelmires de Araújo Neves and Suédina Maria de Lima Silva ()
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Rafaella Resende de Almeida Duarte: Programa de Pós-Graduação em Ciência e Engenharia de Materiais (PPG-CEMat), Universidade Federal de Campina Grande, Av. Aprígio Veloso-882, Campina Grande 58429-900, PB, Brazil
Taynah Pereira Galdino: Programa de Pós-Graduação em Ciência e Engenharia de Materiais (PPG-CEMat), Universidade Federal de Campina Grande, Av. Aprígio Veloso-882, Campina Grande 58429-900, PB, Brazil
Alisson Mendes Rodrigues: Programa de Pós-Graduação em Ciência de Materiais, Faculdade UnB Planaltina, Universidade de Brasília, Brasília 70904-910, DF, Brazil
Marcus Vinicius Lia Fook: Programa de Pós-Graduação em Ciência e Engenharia de Materiais (PPG-CEMat), Universidade Federal de Campina Grande, Av. Aprígio Veloso-882, Campina Grande 58429-900, PB, Brazil
Gelmires de Araújo Neves: Programa de Pós-Graduação em Ciência e Engenharia de Materiais (PPG-CEMat), Universidade Federal de Campina Grande, Av. Aprígio Veloso-882, Campina Grande 58429-900, PB, Brazil
Suédina Maria de Lima Silva: Programa de Pós-Graduação em Ciência e Engenharia de Materiais (PPG-CEMat), Universidade Federal de Campina Grande, Av. Aprígio Veloso-882, Campina Grande 58429-900, PB, Brazil

Sustainability, 2023, vol. 15, issue 19, 1-15

Abstract: Photoprotective cosmetic emulsions have gained significant attention in the cosmetic industry due to their ability to protect against harmful ultraviolet radiation (UV). In this work, photoprotective cosmetic emulsions were prepared by adding 5% natural (Branca and Verde Inferior) and commercial (Brasgel and Cloisite) Brazilian clays to different photoprotective emulsions with and without UVA and UVB chemical filters (EB, EB1 and EB2). All clays were benefited (crushed, milled and sieved) and characterized (X ray fluorescence and X ray diffraction). Additionally, a thermal treatment (120 °C by 24 h) was accomplished in the natural clays, aimed at decontamination. The emulsions were characterized for their organoleptic properties, centrifugation test, viscous behavior, pH values and in vitro sun protection factor (SPF). The cosmetic emulsions prepared without any addition of UV chemical filters presented the lowest in vitro and UVB absorption values because the clays used (Cloisite and Branca) did not have the potential to absorb UV radiation. Although some of the cosmetic emulsions prepared from EB1 and EB2 photoprotective emulsions presented phase separation, all of them presented in vitro SPF values according to the Brazilian standard (above 6), indicating that they have the potential to be used in the cosmetic industry.

Keywords: Brazilian smectite clays; photoprotective cosmetic emulsions; sun protection factor; UVA and UVB chemical filters; cosmetic industry (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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