Diverse nanostructured organic-inorganic materials are present in living entities, with amazing examples such as enamel in teeth or nacre in sea shells [1]. These materials usually have remarkable mechanic properties, which are attributed to the organic-inorganic alternating structure. Currently, polymer-layered silicates nanocomposites have attracted considerable attention because of their potential to produce materials with exceptional physical, thermal and mechanical properties than those of conventional composites. A key to several of the improvements is exfoliation/intercalation of the nano-clay to expose the large available surface area to the polymer and increase the effective aspect ratio of the nano-clay particles [2]. For this type of nanocomposites, several layered silicates have been studied. Recently, stevensites are attracting particular interest because their nanosized and quite transparent particles can be very useful for developing new materials, especially for applications related to specific adsorption, optical devices and improved nanocomposites.
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