Microencapsulation spray coating

Microencapsulation by air suspension technique involves dispersing of solid, particulate core materials in a supporting air stream, and the spray-coating on the air suspended particles ... 

Champagne, C.P., Raymond, Y., Tompkins, T.A. (2010). The determination of viable counts in probiotic cultures microencapsulated by spray-coating. Food Microbiology, 24,1104-1111. 

Spray drying. Microencapsulation by spray drying is an ideal method for poorly water-soluble drugs. The drug is dispersed in polymer (coating) solution, and then this dispersion is atomized into an airstream. The air, usually heated, supplies the latent heat of vaporization required to remove the solvent and forms the microencapsulated product. This technique is employed most commonly when microcapsules are intended for oral use because the resulting microspheres are porous in nature, and large batch sizes are required.89... 

While many other microencapsulation techniques also use surface and in situ polymerization methods or, generally, interfacial reactions to produce soluble or insoluble and impermeable or permeable capsule walls, in addition to the coating and spray drying methods that were discussed previously, a growing number of processes de-... 

Anwar SH, Weissbrodt J, Kunz B (2010) Microencapsulation of fish oil by spray-granulation and fluid bed film coating. Journal of Food Science 75 E359-E371. 

Microencapsulation with complex coacervation has many advantages. It can produce capsules with a payload as high as 95%. The wall of the microcapsules is non-water soluble when it is either cross-linked with chemicals or treated with heat. This is a significant advantage over the microcapsules prepared with other technologies, such as spray drying or fluid bed coating by which the microcapsule wall produced is often water soluble. The microcapsules produced have excellent oxidation stability at low relative humidity, and core release can be initiated by different mechanisms. 

Keita K., Toshiyuki N., and Kazumi D. Preparation of sustained-release coated particles by novel microencapsulation method using three-fluid nozzle spray drying technique. Eur. J. Pharm. Sci. 51... 

Spray drying and fluid-bed drying lead to another popular food application of these technologies, i.e., microencapsulation. Microencapsulation is defined as a process by which one material or a mixture of materials is coated or entrapped within another material or system [69], This process is commonly used to protect a core material from degradation, to control the release of a core material, or to separate reactive components within a formulation. 

Protection via microencapsulation of food ingredients is not a new concept flavors were being encapsulated by acacia gum spray dried coatings in the 1930s. Nutrient protection issues have received much attention and yet still remain. However, the ever-increasing complexity of food products, the massive growth in functional foods, and the interest in efficient delivery of nutrients are opening up many new opportunities. 

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