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Synthesis technique of slow-release essence microcapsules

A flavor microcapsule and slow-release technology, which is applied in the preparation of microcapsule preparations, essential oils/fragrances, and microspheres, and can solve problems such as easy volatilization, fast emission, and poor thermal stability

Inactive Publication Date: 2017-08-25
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary flavors are easy to volatilize, and there are disadvantages such as fast emission, poor thermal stability, and short fragrance retention time during use. The method of flavor microcapsules controls the release speed of flavors, and is an effective way to make flavors slow-release and long-lasting.

Method used

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  • Synthesis technique of slow-release essence microcapsules
  • Synthesis technique of slow-release essence microcapsules
  • Synthesis technique of slow-release essence microcapsules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1. The crosslinking synthetic method in polyvinyl alcohol molecule

[0015] Weigh 2.0 g of polyvinyl alcohol solid, put it into a beaker, add appropriate amount of water, heat and dissolve under magnetic stirring, and prepare a transparent solution with a mass fraction of 4%.

Embodiment 2

[0016] Embodiment 2. Cross-linking synthesis method between polyvinyl alcohol molecules

[0017] Weigh 3.0g of rose essence and add it to a three-necked flask filled with a certain amount of n-heptane, then add an appropriate amount of emulsifier Tween-80 and Span-80 and the molar ratio of the amount is 3-5:2, in a water bath with mechanical stirring Emulsify under conditions for 2-3 hours.

[0018] Pour the dissolved polyvinyl alcohol into the previous three-necked flask. After stirring for a period of time, slowly add 1-2ml of hydrochloric acid and 2-3ml of glutaraldehyde to make the solution acidic, and continue to slowly add glutaraldehyde; Reaction 3- After 4 hours, stop heating, adjust the pH value to neutral with sodium hydroxide, filter with suction, wash, and continue to filter with suction until the product becomes dry; air-dry for 24 hours naturally to obtain the product.

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Abstract

The invention is aimed at the synthesis of essence microcapsules. In this method, polyvinyl alcohol is used as the leather material, and rose essence is used as the core material, and the essence microcapsules are synthesized by interfacial polymerization, and the reaction is carried out at a certain temperature and pH, after emulsification-polyvinyl alcohol dissolution-polymerization-drying , the product does not need to be purified to obtain the final product essence micro-sachet. The synthesis method of the essence micro-sachet involved in the invention is simple, the obtained essence micro-sachet does not need further purification treatment, and the synthesis process is simple and easy, and the production cost is low.

Description

technical field [0001] The invention relates to the synthesis technology of slow-release essence microcapsules. Mainly suitable for biological carrier materials. Background technique [0002] The essence microcapsules will burst under a certain pressure or slowly release the essence molecules through the fine pores of the wall material, so as to achieve the purpose of controlled release and long-term effect. Rose essence has the effects of anti-sensitivity, moisturizing, calming, decompression, and sleeping. Ordinary flavors are volatile, and have disadvantages such as fast emission, poor thermal stability, and short fragrance retention time during use. The method of flavor microcapsules controls the release speed of flavors, and is an effective way to make slow-release and long-lasting flavors. Polyvinyl alcohol (Polyvinylalcohol, PVA) is a water-soluble polymer with a regular molecular structure and a flexible molecular chain. It is a white powdery resin with a semi-crys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/00B01J13/16
CPCC11B9/0003B01J13/16
Inventor 杨俊玲史富娟周春于于振东
Owner TIANJIN POLYTECHNIC UNIV
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