Morphosynthesis of Organoclay Microspheres with Sponge-like or Hollow Interiors

Organoclay hollow microspheres (see Figure) and spheroids with foam-like interiors have been prepared by an in-situ reaction in water-in-oil emulsion droplets. The materials could be calcined at 673 K with retention of the morphology, thus proving the thermal stability. The technique should be applicable to a wide range of organo-functionalized clay materials, which may be used in, e.g., controlled release processes.