Thesis On Microencapsulation

Thesis On Microencapsulation-57
Spray cooling and spray chilling are two commercially available encapsulation processes that both involve dispersing the core material within a melted lipid through homogenization process.Here, the mixture of core and lipid wall is atomized in the low-temperature air causing the fat to solidify around the core, thereby forming a crude encapsulated product.Lipid coating for bypassing the nutrients of interest to the ruminant intestine has the advantage of using relatively low-cost food-grade materials compared to formulated polymeric coatings.

Spray cooling and spray chilling are two commercially available encapsulation processes that both involve dispersing the core material within a melted lipid through homogenization process.Here, the mixture of core and lipid wall is atomized in the low-temperature air causing the fat to solidify around the core, thereby forming a crude encapsulated product.Lipid coating for bypassing the nutrients of interest to the ruminant intestine has the advantage of using relatively low-cost food-grade materials compared to formulated polymeric coatings.

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This technique is also applicable to the ruminant feed industry, as it protects nutrients from degradation in the rumen, making it possible to increase the bioavailability of the core ingredient in the small intestine.

Microencapsulation is defined as a process in which particles of solids or droplets of liquids or gases at micron sizes are surrounded by a coating material or embedded in a homogeneous or heterogeneous matrix to create small capsules with many useful properties.

This review will briefly discuss some aspects of microencapsulation, such as the wall material, core ingredients, encapsulation techniques, and some of their uses in ruminants’ feed technology.

Originally, most methods related to encapsulation dealt with the protection of hydrophilic compounds such as choline, amino acids, proteins, vitamins, enzymes, carbohydrates, drugs, and hormones.

Contrastingly, the disadvantages of this protection method include low payloads of the active material and its limited post-ruminal release and absorption.

The latter is generally inversely related to the degree of rumen protection.

This type of coating leads to forming of capsules called a reservoir structure, where the particles are coated by a layer.

Using this technique, the lipid material is sprayed at temperatures above its melting points onto a template to constitute the shell.

As it is cooled, the fat mass solidifies around the template and forms a protective coat.

Fluidized bed is applied to various products for encapsulation; some of which include vitamins B and C and minerals such as potassium chloride.

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