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Article

Colloidal and Thermal Behaviors of Some Venezuelan Kaolin Pastes for Therapeutic Applications

1
Instituto Universitario de Xeoloxía, Universidade da Coruña, 15071 A Coruña, Spain
2
Laboratorio de Materiales, Centro de Ingeniería de Materiales y Nanotecnología, Instituto Venezolano de Investigaciones Científicas (IVIC), Apartado 20632, Caracas 1020, Venezuela
3
Department of Geology, Faculty of Science, Al Azhar University in Cairo, Cairo 11884, Egypt
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Andalusian Institute of Earth Sciences (Consejo Superior de Investigaciones Científicas-University of Granada), Armilla, 18100 Granada, Spain
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Department of Pharmacy and Pharmaceutical Technology, University of Granada, 18071 Granada, Spain
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Instituto de Ciencias de la Tierra, Facultad de Ciencias, Universidad Central de Venezuela, Caracas 1050, Venezuela
7
School of Physical Sciences and Nanotechnology, Yachay Tech University, Urcuqui EC170505, Ecuador
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(12), 756; https://doi.org/10.3390/min9120756
Received: 4 November 2019 / Revised: 26 November 2019 / Accepted: 29 November 2019 / Published: 4 December 2019
(This article belongs to the Special Issue Special Clays and Their Applications)
This work contributes to the knowledge of colloidal and thermal properties of some important primary-originated kaolin deposits from Bolivar State, Venezuela, and their possible use as semisolid formulations in medicinal muds for topical applications. Eight selected high purity kaolin samples were characterized. Rheological and thermal properties were correlated to physico-chemical characteristics of the clay suspensions (pH, Ca2+, and Mg2+ cation desorption and surface charge). Most of the studied kaolin pastes showed adequate viscosities, acceptable skin safe pH, and good thermal properties for pelotherapeutic uses. Three of the studied samples, in particular, showed very high kaolinite purities (>92% kaolinite), elevated viscosities (>1 Pa·s), and good thermal and pH performances for topical application. View Full-Text
Keywords: kaolin; mud therapy; thermal properties; zeta potential; rheology kaolin; mud therapy; thermal properties; zeta potential; rheology
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MDPI and ACS Style

Hernández, A.C.; Awad, M.E.; Meléndez, W.; González, G.; López-Galindo, A.; Sánchez-Espejo, R.; García-Villén, F.; Viseras, C. Colloidal and Thermal Behaviors of Some Venezuelan Kaolin Pastes for Therapeutic Applications. Minerals 2019, 9, 756. https://doi.org/10.3390/min9120756

AMA Style

Hernández AC, Awad ME, Meléndez W, González G, López-Galindo A, Sánchez-Espejo R, García-Villén F, Viseras C. Colloidal and Thermal Behaviors of Some Venezuelan Kaolin Pastes for Therapeutic Applications. Minerals. 2019; 9(12):756. https://doi.org/10.3390/min9120756

Chicago/Turabian Style

Hernández, Ana C., Mahmoud E. Awad, Williams Meléndez, Gema González, Alberto López-Galindo, Rita Sánchez-Espejo, Fátima García-Villén, and César Viseras. 2019. "Colloidal and Thermal Behaviors of Some Venezuelan Kaolin Pastes for Therapeutic Applications" Minerals 9, no. 12: 756. https://doi.org/10.3390/min9120756

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