Changes in suspension properties of structural modified montmorillonites

Abstract

Rheological changes were found in smectite (Wyoming-and Cheto-type montmorillonites) suspensions after structural modifications. The effect of the particle size and Na

Structural, Mineralogical, and Rheological Properties of Methane Hydrates in Smectite Clays

“…To make a comparison of the chemical compositions, Wyoming- and Cheto-type montmorillonites were analyzed and are listed in Table . Volzone and Garrido reported that the Na + content of montmorillonites is the principal factor in determining the clay’s rheological properties. , As shown in Figure , the viscosities of the two clay suspensions differ substantially, even at the same clay concentration. The Wyoming-type clay suspension is highly viscous with a thixotropic property, while the rheological behavior of the Cheto-type montmorillonite follows a Newtonian fluid.…”

“…15 Diverse compositions of exchangeable cations in clay minerals result in diverse colloidal, plastic, and other properties of clays upon interaction with the sur- rounding media. 16,17 From Figure 2, it is seen that the Cheto clay with interlayer Ca 2+ exhibits a weaker promotion function for hydrate stability than the Otay clay. It indicates that the size and charge of the interlayer cation significantly might influence the entire IMH formation process, including crystal nucleation and growth.…”

Preparation of nanocrystalline cellulose-montmorillonite composite via thermal radiation for liquid-phase adsorption

“…The basal spacing d(001) in MMT could not be observed which is probably due to collapse of the crystallite structure. The collapse was induced by the pretreatment of raw MMT, specifically grinding and the NaCl submersion process which promotes crystal size reduction [28]. NcMMT, as well as NCC, possessed major peaks at 16.1°and 22.5°which indicates 101 and 002 lattice planes [33].…”

“…Montmorillonite (MMT) is one of the clay minerals piled up as the result of the volcanic rocks alteration. MMT is classified as smectite which possess an octahedral layer containing aluminum ions between two tetrahedral silica layers [27,28]. Numerous studies have demonstrated that the adsorption capability of clays can be improved by modifying the surface of clay with synthetic or natural organic substances [22,23,25].…”