Graphical Encoding of Oil@Hydrogel Core-Shell Microcapsules
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초록
내용
Microcapsules are widely used for pharmaceutics, cosmetics, and food industry, because we can endow the diverse types of functionality inside the capsules. However, it is difficult to distinguish the capsules with different functionalities, when they are dispersed in the same solution. In this work, we propose the method for fabricating the microcapsules that have hydrogel shell labeled with SU-8 particles, which is called 'encoding technology' that enables easy distinction of different capsules in one solution. Here, we prepare oil-in-water-in-oil double emulsion drops by using a microfluidic device. The inner drop contains oil and desired oil-soluble materials. The middle phase consists of aqueous PEGDA solution to fabricate a hydrogel shell, and SU-8 particles are added to label the shell. We can apply this technology to selective reaction between two different types of microcapsules. For example, only reaction between A and B labeled capsules is valid, not A and A or B and B.