Inorganic nanomaterials synthesized by various different means are interesting materials to be applied in polymeric matrices like coating resins, thermoplastics. At the same time these materials are normally made as powders that because of the small particle size, high surface area and high surface energy are agglomerated to micron sized aggregates. To achieve the benefit of nanoscale materials in polymers the first step is to de-agglomerate the nanoparticles to the best extend feasible and second to surface treat these particles with organic materials to compatibilize and functionalise the surface. This ensures good stability in liquid medium as well as in the solid polymer matrix after curing or cooling. The nature of the surface treatment leading to core-shell nanomaterial is therefore essential to optimise the use of nanomaterials in paint and plastics. Example of surface treated Silica, Alumina and ZnO are shown along with some hypothesis on the mode of action of the surface treatment.
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