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

Engineered Particulates The coating of individual particles with other, smaller particles is commonly carried out to improve the characteristics of particles 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 Nanoparticulates are widely used in industry Nanoparticulates are widely used in industry Cosmetics Cosmetics Dyestuff Dyestuff Toner Toner Pharmaceuticals Pharmaceuticals Food Food Ceramics Ceramics Powder Powder Biochemical Biochemical Electromaterials Electromaterials Fertilizer Fertilizer

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

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

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

Dry Particle Coating

Dry Particle Coating Equipment Dry Particle Coating Equipment Mechanofusion Mechanofusion Hybridizer Hybridizer Magnetic Assisted Impactation Coating Magnetic Assisted Impactation Coating

Mechanofusion

Hybridizer

MAIC

Examples Cornstarch CS coated with TiO 2

Examples Processing Time – 5 MinsProcessing Time – 10 Mins Surface Morphology of Cellulose/TiO 2 at different processing times

Examples

Current Research at NJIT Coating Particles using various coating techniques to create host/guest blends Coating Particles using various coating techniques to create host/guest blends Cornstarch/TiO 2 Cornstarch/TiO 2 Pure Al/R972 Pure Al/R972 After Processing, nanoparticulates are processed again together to discover if guest particle exchange still occurs after coating 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 To be analzyed using EDX and SEM imaging