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USF Available Technologies Supercritical Fluid Aided Coating of Particulate Material R ADVANTAGES: esearchers at the University of South Florida have developed a method for preparing coatings of thin films onto solid particle. Forming thin film on particles Simultaneous nucleation and deposition Over the last two decades or so, there has been an influx of new supercritical-fluid-aided material processing options for a variety of materials. Some of these processes include impregnation of porous matrices, formation of controlled porosity materials, nucleation of particles with narrow and controlled particle size and drying. However, none of these processes permits coating of particles with high quality thin films. It is therefore imperative to provide a method to eliminate these challenges. Schematic Description of the Process The technology developed by the University of South Florida inventors provides a method for forming thin films on particles; the method includes the steps of suspending particles to be coated in a supercritical fluid containing dissolved coating material. It simultaneously nucleates and deposits the dissolved coating material onto the surface of the particles forming the desired thin films. The technology is suitable for controlled release particulate applications including air bags, gas generators, solid propellants, ordnance, and time release drugs. Until this invention of supercritical-fluid-aided material processing, the effort to identify successful techniques for achieving the required microns-thin, high-quality particle coatings was unsuccessful. This invention also relates to green technology. Method for forming thin film on particles Tech ID #97A010 Patent #: 6,426,116 University of South Florida | Technology Transfer Office 813.974.0994 (office) | 813.974.8490 (fax) [email protected] http://www.usf.edu/research-innovation/pl/