Dodecyl Pyridinium/Alkali Metals Ion Exchange on Muscovite Mica

Determination of the Cation-Exchange Capacity of Muscovite Mica

“…The MB + /K + exchange was actually fast at the beginning and half of the surface ions were exchanged within 1 h, then the exchange slowed down and took several days to reach the saturation value. This is a phenomenon which was also observed and discussed in case of the dodecylpyridinium ion (NDP + )/K + exchange (31). It is also noteworthy that the amounts of adsorbed MB + and released K + are in good agreement within the experimental error.…”

“…To overcome this problem the surface of naturally weathered mica is usually saturated with an index cation, which is laborious and should be carefully monitored, before the measurement of its CEC (12). The exchange rate of these cations depends on their relative affinities to mica (6,31). In order to make a reasonable comparison between the different methods of CEC measurement, the surface of the mica used has to be saturated with a cation which has high affinity to it.…”

“…Recently, it was found that the reaction time necessary to fully exchange the accessible cations of muscovite can be quite long depending on the relative affinities of the cations (30,31). Therefore, it is of great importance for an accurate measurement of the CEC of mica to study the kinetics of the exchange reactions involved.…”

Muscovite Reverses Gastric Gland Atrophy and Intestinal Metaplasia by Promoting Cell Proliferation in Rats with Atrophic Gastritis

“…The crystal structure of muscovite consists of negatively charged 2:1 layers whose charges are compensated by interlayer cations. Hence, muscovite has a high cation-exchange capacity [18]. Hydration of the interlayer region can cause an increase of the layer spacing, hence the expandable nature of the minerals and easier adsorption by the mucous surface [19].…”

Organic–inorganic hybrid coating (poly(methyl methacrylate)/monodisperse silica)

“…The most commonly employed preparation procedures for these materials are the use of the sol-gel process for the formation of the inorganic network, the incorporation of preformed dense inorganic structures, such as clusters and particles, and the formation of hybrids using porous or layered inorganic materials either by interpenetration of the organic polymers into the voids, or by exfoliation of the inorganic material [12][13][14]. The unique properties of these materials, such as their high optical transparency, as well as the lack of data on structure-property relationships at a nanoscale, has led to emerging research in this area.…”