Synthesis of Engineered Synthesis of Engineered Particulates Using Dry Particulates Using Dry

Particle CoatingParticle Coating

By Nick van NispenBy Nick van Nispen

Engineered ParticulatesEngineered Particulates

Powder materials designed to have specific Powder materials designed to have specific properties are called properties are called Engineered Engineered or or Designed Designed ParticulatesParticulates Three TypesThree Types

Coated particles (discrete and film coatingsCoated particles (discrete and film coatings Designer particles having a specific size, shape or Designer particles having a specific size, shape or

morphologymorphology Composite particles (nano-composites, granulated particles)Composite particles (nano-composites, granulated particles)

Our research focuses on the formation/synthesis of Our research focuses on the formation/synthesis of coated particles using new and innovative coated particles using new and innovative techniquestechniques

Engineered ParticulatesEngineered Particulates

The coating of The coating of individual particles individual particles with other, smaller with other, smaller particles is particles is commonly carried commonly carried out to improve the out to improve the characteristics of characteristics of particlesparticles Wet Particle CoatingWet Particle Coating Dry Particle CoatingDry Particle Coating

ApplicationsApplications

Nanoparticulates are widely used in industryNanoparticulates are widely used in industry CosmeticsCosmetics DyestuffDyestuff TonerToner PharmaceuticalsPharmaceuticals FoodFood CeramicsCeramics PowderPowder BiochemicalBiochemical ElectromaterialsElectromaterials Fertilizer Fertilizer

ApplicationsApplications Particle Coating can change the properties of Particle Coating can change the properties of

target particlestarget particles FlowabilityFlowability DispersibilityDispersibility WettabilityWettability ColoringColoring FalvorFalvor Hydrophilic/Hydrophobic PropertiesHydrophilic/Hydrophobic Properties Electristatic/Electric/Magnetic/Optical CharacteristicsElectristatic/Electric/Magnetic/Optical Characteristics Particle Size DistributionParticle Size Distribution Shape/SphericityShape/Sphericity Solid Phase ReactivitySolid Phase Reactivity

Wet Particle CoatingWet Particle Coating

Currently Industrial Standard for Currently Industrial Standard for nanoparticle coatingnanoparticle coating DrawbacksDrawbacks

WPC solution may be volatile and toxicWPC solution may be volatile and toxic Requires post treatment and waste Requires post treatment and waste

processing processing increases cost increases cost

Dry Particle CoatingDry Particle Coating

Advantages to WPCAdvantages to WPC new particles may have completely new particles may have completely

different functionality or much improved different functionality or much improved properties properties

much reduced use of high-priced or rare much reduced use of high-priced or rare materials materials

Process is environmentally cleanProcess is environmentally clean Water soluble powders can now be coated Water soluble powders can now be coated

without compromising the samplewithout compromising the sample

Dry Particle CoatingDry Particle Coating

Dry Particle CoatingDry Particle Coating

Dry Particle Coating EquipmentDry Particle Coating Equipment MechanofusionMechanofusion HybridizerHybridizer Magnetic Assisted Impactation CoatingMagnetic Assisted Impactation Coating

MechanofusionMechanofusion

HybridizerHybridizer

MAICMAIC

ExamplesExamples

Cornstarch

CS coated with TiO2

ExamplesExamples

Processing Time – 5 Mins Processing Time – 10 Mins

Surface Morphology of Cellulose/TiO2 at different processing times

ExamplesExamples

Current Research at NJITCurrent Research at NJIT

Coating Particles using various coating Coating Particles using various coating techniques to create host/guest blendstechniques to create host/guest blends Cornstarch/TiOCornstarch/TiO22

Pure Al/R972Pure Al/R972 After Processing, nanoparticulates are After Processing, nanoparticulates are

processed again together to discover if processed again together to discover if guest particle exchange still occurs after guest particle exchange still occurs after coatingcoating To be analzyed using EDX and SEM imagingTo be analzyed using EDX and SEM imaging