Adsorption of Nonionic Surfactants on Kaolins

✍ Scribed by A. Tahani; H.Van Damme; C. Noik; P. Levitz

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 169 KB
• Volume: 184
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0642

✦ Synopsis

tants on a hydrophilic silica surface using neutron reflection Adsorption of nonionic surfactant on kaolins of different origins confirmed the previous experimental results (12). All of was studied. The shape of the isotherm differs only slightly acthese works show that the adsorption mechanism of nonionic cording to the origin of the kaolin, but the amount adsorbed is surfactants is reversible and that the plateau of the isotherm quite different. The relation between the morphology of the kaolin is reached just after the critical micellar concentration. This particles and the shape of the isotherm is not clear. Fluorescence corresponds to the stabilisation of the monomer chemical studies show two different solubilization sites for adsorbed pyrene potential in equilibrium with the adsorbed phase. Surfactant molecules. However, these two environments could not be corremonomers adsorb by hydrogen bonding between the polyoxlated to the basal and lateral surfaces of the mineral particles.

yethylene chain and the hydroxyl groups on the surface (10).