Use of Zeta Potential and XRD Analyses for the Evaluation of the Applicability of Organo/inorganoclays in Different Cosmetic Products

Akın İ., Özsır H., Özdemir G.

3rd International Cosmetic Congress organized by KUAD, Main Theme: Minimalist Cosmetics, 7-8 Nov. 2019, Proceedings Book, , Antalya, Turkey, 7 - 08 November 2019, pp.117-120

  • Publication Type: Conference Paper / Full Text
  • City: Antalya
  • Country: Turkey
  • Page Numbers: pp.117-120



Clay minerals are alumina silicate compounds derived from nature. Montmorillonite (MMT) type clay is a mineral with a high cation exchange capacity that has a layered structure. The surface of the layers is negatively charged and can be converted from hydrophilic to organophilic structure by an ion-exchange reaction using cationic surfactants such as alkyl ammonium or alkyl phosphonium type. Organo-montmorillonites have the properties as thickener, binder, dispersant, emulsion stabilizer, opacifier and they are effective against acne, and have a high oil absorption capacity. These properties enable organic clays to be used in a wide variety of cosmetics and personal care products such as make-up materials (colorful lipsticks, powdered pancake type foundations), sunscreens, skin care products, nail lacquers, bath products, lip-protecting sticks and the like. This study includes the preparation of organic and organic-inorganic montmorillonite type clays using cationic and anionic surfactants and heavy metal ions (copper-zinc). The purpose of the study was to evaluate the effect of the different types of ions on the surface charge of the MMT platelets and on their interfacial adsorption. Zeta potential and X-ray diffraction (XRD) measurements were used in order to find out in which applications these organo-inorgano-montmorillonites prepared with different modifications might be used. While zeta potential analysis gives information about the adsorption properties of the outer surface of MMT platelets, XRD analysis gives information about the structure of organic/inorganic ions adsorbed between the layers.