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Types of Microencapsulation

Ethyl Cellulose
Ethyl Cellulose

This could explain the increased yield microencapsulation of Rosemary oil (density 0.91 g/ml) compared to limonene (density 0.84 g/ml). Determination of limonene content in ethyl cellulose microcapsules. The limonene content was estimated by FT-Raman spectroscopy. FT-Raman spectra of limonene and cyclohexane are presented in Fig. 2.

Gelatin
Gelatin

Microencapsulation is a process in which tiny particles or droplets are surrounded by a coating to give small capsules, of many useful properties. In general, it is used to incorporate food ingredients, enzymes, cells or other materials on a micro metric scale. Microencapsulation can also be used to enclose solids, liquids, or gases inside a micrometric wall made of hard or soft soluble film, in order to reduce dosing frequency and prevent the degradation of pharmaceuticals.

Polyvinyl Alcohol
Polyvinyl Alcohol

Polyvinyl butyral (PVB) and polyvinyl formal (PVF) are examples of this family of polymers. They are prepared from polyvinyl alcohol by reaction with butyraldehyde and formaldehyde, respectively. Preparation of polyvinyl butyral is the largest use for polyvinyl alcohol in the U.S. and Western Europe.

Sodium Alginate
Sodium Alginate

The polymers used for islet microencapsulation are alginate, chitosan, polyethylene glycol (PEG), agarose, sodium cellulose sulfate and water-insoluble polyacrylates with alginate and PEG being commonly used polymers.

image: mcmaster.ca