Case Study

Advanced Oil Microencapsulation

Improve active preservation, controlled release, structuration and taste masking

Microencapsulation uses an emulsion comprised of three components: a solvent (like water), a carrier (starch) and a core/active (oil or vitamin). Traditional oil drying via spray drying or freeze drying, while widely accepted, each have significant drawbacks. High-temperature spray drying can damage active ingredients during processing and result in the surface active being exposed to oxidization. Freeze drying is time consuming and inefficient for manufacturing at scale.

How to improve this?

In microencapsulation, each emulsion component has different polarities. And when an electrostatic charge is applied, the solvent and carrier, the most polar of the trio, share the largest dipole moment. The active, being less polar, has a smaller dipole. And this forces the solvent and carrier to migrate to the outer surface of the microencapsulated droplet, while the active remains in the center of the droplet.

Today, electrostatic spray drying is only possible with Fluid Air’s patented PolarDry technology.

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