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Heatproof microencapsulated essence and its preparation method

A technology of microencapsulation and flavoring, which is applied in the direction of microcapsule preparation, microsphere preparation, essential oil/fragrance, etc. It can solve the problem that the wall material strength, heat resistance and particle size distribution of microcapsule flavoring cannot meet the requirements, and the product is difficult to filter Separation, high moisture content and other problems, to achieve the effect of small droplets, good fluidity, and small essence droplets

Inactive Publication Date: 2012-11-21
HEFEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent 200910254529.5 provides a method for preparing high-temperature-resistant essence microcapsules. A high-temperature-resistant essence microcapsule is prepared with gelatin arabic gum as the wall material. This method belongs to the physical compound gel method and requires precise control of the pH of the reaction system. Value, the product is difficult to filter and separate, high moisture content, slow drying
The thermal processing temperature of thermoplastic polymer materials is usually above 180°C, but the wall material strength, heat resistance and particle size distribution of existing microcapsule flavors cannot meet the requirements

Method used

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  • Heatproof microencapsulated essence and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0036] 1. Prepolymer synthesis: Add 1.5g gelatin, 7.5g melamine, 9.7g formaldehyde solution with a mass concentration of 37% and 70.0g water to a 250ml three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, and use a mass concentration of 10 % sodium hydroxide solution to adjust the pH value to 8.5, raise the temperature to 80°C, keep the reaction solution transparent for 0.5 hours to prepare a gelatin-modified melamine resin prepolymer solution, and cool it down to room temperature for later use.

[0037] 2. Emulsification and dispersion: Add 200.0g of water and gelatin-modified melamine resin prepolymer solution to a 500ml beaker in turn, turn on the homogeneous emulsifier (model ESR, Shanghai Specimen Model Factory), add 12.0g of jasmine concentrated essence (Shanghai Linpa Perfume Co., Ltd.), emulsified and dispersed at room temperature for 40 minutes to prepare a water-dispersed flavor emulsion for future use.

[0038] 3. Microcapsule coating: A...

Embodiment 2

[0040] 1. Prepolymer synthesis: Add 1.3g gelatin, 6.0g melamine, 2.0g phenylmelamine, 10.4g formaldehyde with a mass concentration of 37% to a 250ml three-neck flask equipped with a thermometer, agitator and reflux condenser Aqueous solution and 70.0g water, adjust the pH value to 7.5 with sodium bicarbonate, heat up to 85°C, the reaction solution becomes transparent and then keep it warm for 0.5 hours to prepare gelatin modified melamine-phenylmelamine resin prepolymer solution , down to room temperature for later use.

[0041] 2. Emulsification and dispersion: Add 200.0g of water and gelatin modified melamine-phenylmelamine resin prepolymer solution in sequence to a 500ml beaker, turn on the homogeneous emulsifier (model ESR, Shanghai specimen model factory), add 12.0 g of jasmine with concentrated essence (Shanghai Linpa Perfume Co., Ltd.), emulsified and dispersed at room temperature for 40 minutes to obtain a water-dispersed essence emulsion, which is set aside.

[0042]...

Embodiment 3

[0044] 1. Prepolymer synthesis: Add 1.5g gelatin, 5.5g melamine, 2.5g urea, 12.5g formaldehyde solution with a mass concentration of 37% and 75.0g water to a 250ml three-necked flask equipped with a thermometer, a stirrer and a reflux condenser. Use sodium carbonate to adjust the pH value to 8.0, raise the temperature to 75°C, and keep the reaction solution for 0.5 hours after the reaction solution becomes transparent to prepare a gelatin-modified urea-formaldehyde resin prepolymer solution, which is lowered to room temperature for later use.

[0045] 2. Emulsification and dispersion: Add 220.0g of water and gelatin-modified urea-formaldehyde resin prepolymer solution in sequence to a 500ml beaker, turn on the homogeneous emulsifier (model ESR, Shanghai Specimen Model Factory), add 12.0g of jasmine concentrated essence (Shanghai Lin Pa Perfume Co., Ltd.), emulsified and dispersed at room temperature for 40 minutes to prepare a water-dispersed flavor emulsion for later use.

[...

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Abstract

The invention discloses a heatproof microencapsulated essence used for thermoplastic high polymer materials, and its preparation method. The heatproof microencapsulated essence treats an oil-soluble liquid essence as a capsule core, a gelatin modified amino resin prepolymer as an emulsification dispersant and a gelatin modified amino resin composite material as a wall material. The preparation method of the heatproof microencapsulated essence comprises the processes of prepolymerization, emulsifying dispersion and microcapsule coating. The heat decomposition temperature and the softening temperature of the microencapsulated essence can reach above 200DEG C, mechanical performances comprising the heat resistance, the toughness and the like of the microencapsulated essence are excellent, and the microencapsulated essence has a long-lasting fragrance; and the particle size of the microencapsulated essence is 1-10mum, so the microencapsulated essence can be easily and uniformly dispersed in the high polymer materials.

Description

1. Technical field [0001] The invention relates to a heat-resistant microencapsulated essence and a preparation method thereof. 2. Background technology [0002] Microcapsule technology has been used in industry, agriculture, medical treatment and other fields, such as pressure-sensitive copy paper, microencapsulated red phosphorus flame retardant, slow release and controlled release of drugs or flavors, etc. Depending on the application, the microcapsule wall material can protect the capsule core substance from the external environment, or control the release rate of volatile substances. [0003] Essence has a pleasant smell, which can eliminate peculiar smell and improve people's quality of life. The preservation of the product and the stability of adding it to the product have become an important topic of general concern. Therefore people eagerly hope to find a kind of method that can protect essence, improve its stability or thermal processing performance. [0004] Ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/00B01J13/02
Inventor 吕建平徐传芳蔡秀丽熊孝勇李玉新彭敏
Owner HEFEI UNIV OF TECH
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