Microcapsule technology is a kind of micro- or nano-scale micro-particle products, which uses natural or synthetic polymer materials as micro-capsule wall materials to encapsulate solid and liquid pharmaceuticals, foods and chemical raw materials into capsule core materials. New technology, new technology. Has been applied in many fields such as medicine, food, fine chemicals. As an emerging technology, it has been widely used in food, chemical, agricultural and other fields. In recent years, researchers at home and abroad have made a lot of explorations on the application of microcapsule technology in the field of food packaging, and have made important progress. Preparation of functional microcapsules and polymer substrates to prepare functional packaging materials is the main way to combine microcapsule technology with packaging.
The wall material used in food packaging is cyclodextrin . Cyclodextrin has the characteristics of external hydrophilicity and internal hydrophobicity, and can form microcapsules with various guest molecules. The microcapsules carrying guest molecules are mixed with polymer substrates to make packaging materials, which can expand the application of polymers in food and pharmaceutical packaging. . The mechanism of action of microcapsules in food packaging is that the microcapsule core material diffuses through the micropores, cracks or semipermeable membranes on the wall material in the sustained release package, thereby releasing the core material, and when the microcapsules are combined with the packaging substrate The core material is slowly released from the microcapsules, then migrates from the packaging material, and finally reaches the functional surface of the packaged object. There are many methods for preparing microcapsules in the field of food packaging, including coprecipitation (saturated aqueous solution), ultrasonic, emulsification-curing, in-situ polymerization, and the like.
Figure 1 MP-180 high pressure microcapsule forming device
Figure 2 Microcapsule micrograph prepared by high voltage static electricity
The MP-180 high-pressure microcapsule molding device (see Figure 1) produced by Shanghai Baosheng Co., Ltd. has the advantages of compact structure and convenient operation. The prepared microcapsules have regular spherical shape, uniform size, smooth surface and high quality (see Figure 2), so that the addition of microcapsules can maximize food flavor, nutrients and extend shelf life.
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