Nano encapsulation is a method used in material coating that is now quite popular in most industries. This process has become significant in food ingredient production where food flavors are the most common as well. Nano encapsulation is used in volatile bioactives for carbonless copy paper, food, adhesives, textiles, phase change materials, and many more.
A lot of other derived techniques has been developed in micro encapsulation wherein pan coating, spray drying and centrifugal extrusion are the most famous. Pan coating is used widely in drug preparation and production. It is the oldest means of creating small, coated tablets. Particles in this method will be brought down onto a pan while at the same time the coating material is being applied.
Centrifugal extrusion is often performed in liquid properties. In this technique, the liquid substance is going to be surrounded by a wall solution. This method is ideal in making particles that no greater than 2,000 micrometers. Through the Rayleigh instability, liquid jet moves through the air. As it breaks down into tiny pieces, droplets will soon be formed. This process is crucial not only for liquid substances but for slurry cement slurry too.
In spray drying, the process is carried out by means of dissolving active materials to polymer solutions. This is ideal for materials that continually go through changes for this technique has very short contact time with the dryer. This is economical as well. No wonder industrial laboratories prefer implementing this in most of their projects.
Encapsulation is done not only by using physical properties. The chemical techniques in encapsulation can yield much more particle dispersions which can be great for core shell capsule and oil in water emulsion. These can be done through interfacial polycondensation, interfacial cross linking, in situ polymerization and matrix polymerization.
In interfacial polycondensation, two reactants in condensation polymers will meet in the interface to react rapidly. This technique is extracted from the method of synthesizing amides from amines, the Schotten-Baumann reaction. A base property through the neutralized acid will be formed during the reaction.
In interfacial cross linking, toxic diamines are eliminated in cosmetic and pharmaceutical applications. In the process, tiny bifunctional monomers with active hydrogen composed atoms will be dismissed through biosourced polymers like protein. During reaction, acid chloride reacts with different functional groups that will lead to membrane creation. This is said versatile just like the properties found in most micro capsules.
As for in situ polymerization, certain cellulose fibers are encapsulated through using polyethylene. Coating thickness in this process is anticipated to be about 0.2 micrometer or so. This creates uniform coating even in sharp projection. The protein that is present in chemical reaction will serve as membrane of coated materials. And accordingly, this membrane is far more resistant when compared to those obtained through the interfacial polycondensation.
Lastly, matrix polymerization for nano encapsulation is patterned from the technique used in spray drying. Particles in this method will be created through letting solvents that are derived from matrix materials evaporate. In some cases, however, solidification of matrix could be caused by its distinctive changes.
A lot of other derived techniques has been developed in micro encapsulation wherein pan coating, spray drying and centrifugal extrusion are the most famous. Pan coating is used widely in drug preparation and production. It is the oldest means of creating small, coated tablets. Particles in this method will be brought down onto a pan while at the same time the coating material is being applied.
Centrifugal extrusion is often performed in liquid properties. In this technique, the liquid substance is going to be surrounded by a wall solution. This method is ideal in making particles that no greater than 2,000 micrometers. Through the Rayleigh instability, liquid jet moves through the air. As it breaks down into tiny pieces, droplets will soon be formed. This process is crucial not only for liquid substances but for slurry cement slurry too.
In spray drying, the process is carried out by means of dissolving active materials to polymer solutions. This is ideal for materials that continually go through changes for this technique has very short contact time with the dryer. This is economical as well. No wonder industrial laboratories prefer implementing this in most of their projects.
Encapsulation is done not only by using physical properties. The chemical techniques in encapsulation can yield much more particle dispersions which can be great for core shell capsule and oil in water emulsion. These can be done through interfacial polycondensation, interfacial cross linking, in situ polymerization and matrix polymerization.
In interfacial polycondensation, two reactants in condensation polymers will meet in the interface to react rapidly. This technique is extracted from the method of synthesizing amides from amines, the Schotten-Baumann reaction. A base property through the neutralized acid will be formed during the reaction.
In interfacial cross linking, toxic diamines are eliminated in cosmetic and pharmaceutical applications. In the process, tiny bifunctional monomers with active hydrogen composed atoms will be dismissed through biosourced polymers like protein. During reaction, acid chloride reacts with different functional groups that will lead to membrane creation. This is said versatile just like the properties found in most micro capsules.
As for in situ polymerization, certain cellulose fibers are encapsulated through using polyethylene. Coating thickness in this process is anticipated to be about 0.2 micrometer or so. This creates uniform coating even in sharp projection. The protein that is present in chemical reaction will serve as membrane of coated materials. And accordingly, this membrane is far more resistant when compared to those obtained through the interfacial polycondensation.
Lastly, matrix polymerization for nano encapsulation is patterned from the technique used in spray drying. Particles in this method will be created through letting solvents that are derived from matrix materials evaporate. In some cases, however, solidification of matrix could be caused by its distinctive changes.
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