Characterization of a Brazilian Kaolin and Its Sorption Ability to Mineral Oils

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Pinheiro, Gilmar ; Carvalho, Thamires ; Michel, Bianca ; Arjona, Jessica ; Bobadilha, Margarita ; Silva-Valenzuela, Maria ; Costa, Tatiana ; Valenzuela-Diaz, Francisco ; Li, J ; Zhang, M ; Li, B ; Monteiro, SN ; Ikhmayies, S ; Kalay, YE ; Hwang, JY ; EscobedoDiaz, JP ; Carpenter, JS ; Brown, AD

• Document type: Journal article
• Source: CHARACTERIZATION OF MINERALS, METALS, AND MATERIALS 2020; v. N/A, p. 7-pg., 2020-01-01.

Abstract

Kaolins are clays with a wide range of uses, being one of them as a component in several types of cosmetics and pharmaceuticals products as excipient agents for chemical actives, considering its potential to meet international requirements described in pharmacopeias, so the use of kaolin in the cosmetic industry has been expanded based on the final properties achieved with its formulated products, like hydration capabilities, higher nutrition degree of the skin, and smoothness. There are not many published researches available concerning the sorption capacity of cosmetics oils in kaolin, like chestnut oil, pine oil, soybean oil, among others, mainly related to creams and emulsified products. This paper is focused on a commercial kaolin from the state of Sao Paulo, Brazil, aiming its use in the cosmetic industry as unguents and skin creams. Characterization was made using XRD, FTIR, SEM, particle size distribution, and cosmetic oil sorption capacity of the kaolin. Results obtained in some of the tested oil systems were superior to 150% oil absorption on a weight basis. (AU)

• FAPESP's process: 19/01231-2 - Development of Brazilian clay/isoniazid compounds for use in isoniazid delivery system
• Grantee: Francisco Rolando Valenzuela Diaz
• Support Opportunities: Regular Research Grants