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Synthesis of Engineered Particulates Using Dry Particle Coating

Synthesis of Engineered Particulates Using Dry Particle Coating. By Nick van Nispen. Engineered Particulates. Powder materials designed to have specific properties are called Engineered or Designed Particulates Three Types Coated particles (discrete and film coatings

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Synthesis of Engineered Particulates Using Dry Particle Coating

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  1. Synthesis of Engineered Particulates Using Dry Particle Coating By Nick van Nispen

  2. Engineered Particulates • Powder materials designed to have specific properties are called Engineered or Designed Particulates • Three Types • Coated particles (discrete and film coatings • Designer particles having a specific size, shape or morphology • Composite particles (nano-composites, granulated particles) • Our research focuses on the formation/synthesis of coated particles using new and innovative techniques

  3. Engineered Particulates • The coating of individual particles with other, smaller particles is commonly carried out to improve the characteristics of particles • Wet Particle Coating • Dry Particle Coating

  4. Applications • Nanoparticulates are widely used in industry • Cosmetics • Dyestuff • Toner • Pharmaceuticals • Food • Ceramics • Powder • Biochemical • Electromaterials • Fertilizer

  5. Applications • Particle Coating can change the properties of target particles • Flowability • Dispersibility • Wettability • Coloring • Falvor • Hydrophilic/Hydrophobic Properties • Electristatic/Electric/Magnetic/Optical Characteristics • Particle Size Distribution • Shape/Sphericity • Solid Phase Reactivity

  6. Wet Particle Coating • Currently Industrial Standard for nanoparticle coating • Drawbacks • WPC solution may be volatile and toxic • Requires post treatment and waste processing  increases cost

  7. Dry Particle Coating • Advantages to WPC • new particles may have completely different functionality or much improved properties • much reduced use of high-priced or rare materials • Process is environmentally clean • Water soluble powders can now be coated without compromising the sample

  8. Dry Particle Coating

  9. Dry Particle Coating • Dry Particle Coating Equipment • Mechanofusion • Hybridizer • Magnetic Assisted Impactation Coating

  10. Mechanofusion

  11. Hybridizer

  12. MAIC

  13. Examples Cornstarch CS coated with TiO2

  14. Examples Surface Morphology of Cellulose/TiO2 at different processing times Processing Time – 5 Mins Processing Time – 10 Mins

  15. Examples

  16. Current Research at NJIT • Coating Particles using various coating techniques to create host/guest blends • Cornstarch/TiO2 • Pure Al/R972 • After Processing, nanoparticulates are processed again together to discover if guest particle exchange still occurs after coating • To be analzyed using EDX and SEM imaging

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