Synthesis and Characterization of Organophilic Clay from Cuban Chiqui Gomez Bentonite
Smectites are clay mineral with a layered structure and nanometric thickness, high specific area and a huge variety of uses. Consisting on stacked layers of about 1nm thickness, including two silica tetrahedral and one octahedral sheet. Properties of natural Smectites can be enhanced by organic modification, due to the substitution of the exchangeable cations in the interlayer area. In fact, the properties of the modified smectite (organophilic clay) are related to its modified chemical composition and structural parameters. The interaction of smectite clays with surfactants has an important interest in the fields of drilling fluids, paints, cosmetic, ceramic industries and others. Recent applications are: remediation of contaminated areas and polymer/clay nanocomposites. The aim of this paper is to obtain organophilic clays using a bentonite from the Chiqui Gómez deposit in Central Cuba. The raw and organophilic clays were analyzed by DRX, SEM, swelling capacity in organic solvents and others.
Lucio Salgado and Francisco Ambrozio Filho
G. R. M. Cortés et al., "Synthesis and Characterization of Organophilic Clay from Cuban Chiqui Gomez Bentonite", Materials Science Forum, Vols. 660-661, pp. 1093-1098, 2010