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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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engineered particulates
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
engineered particulates1
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
applications
Applications
  • Nanoparticulates are widely used in industry
    • Cosmetics
    • Dyestuff
    • Toner
    • Pharmaceuticals
    • Food
    • Ceramics
    • Powder
    • Biochemical
    • Electromaterials
    • Fertilizer
applications1
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
wet particle coating
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
dry particle coating
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
dry particle coating2
Dry Particle Coating
  • Dry Particle Coating Equipment
    • Mechanofusion
    • Hybridizer
    • Magnetic Assisted Impactation Coating
examples
Examples

Cornstarch

CS coated with TiO2

examples1
Examples

Surface Morphology of Cellulose/TiO2 at different processing times

Processing Time – 5 Mins

Processing Time – 10 Mins

current research at njit
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