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Method of preparing microcapsule emulsion with high-concentration and high core/wall ratio by adopting complex coacervation method

A complex coacervation and microcapsule technology, applied in microcapsule preparation, microsphere preparation and other directions, can solve the problems of low concentration, unstable freezing of microcapsule emulsion, small core wall, etc., and achieve the effect of stable properties

Inactive Publication Date: 2011-09-14
GOLD HONG YE PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a method for preparing high-concentration and high-core-wall-ratio microcapsule emulsions by a composite coagulation method. The problem

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  • Method of preparing microcapsule emulsion with high-concentration and high core/wall ratio by adopting complex coacervation method
  • Method of preparing microcapsule emulsion with high-concentration and high core/wall ratio by adopting complex coacervation method

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Embodiment 1

[0034] Example 1: A method for preparing high-concentration and high-core-wall-ratio microcapsule emulsions by a complex coacervation method

[0035] A method for preparing high-concentration and high-core-wall-ratio microcapsule emulsions by complex coacervation (taking the preparation of eucalyptus oil emulsion essence microcapsules as an example).

[0036] 1. Mix and emulsify gelatin, gum arabic, eucalyptus oil, and deionized water at a mass ratio of 7:7:126:211, and keep the mixture at 40°C to 45°C.

[0037] 2. Use emulsification equipment to emulsify the mixed solution in step 1 of the experiment, and the target particle size is 2.8±0.2 microns.

[0038] 3. Add deionized water preheated to about 40°C to dilute to a concentration of 24%, and stir for 10 minutes.

[0039] 4. Adjust the pH to 4.4-4.5, and stir for 10 minutes.

[0040] 5. Freeze the solution to 4-10°C for 30 minutes.

[0041] 6. Add glutaraldehyde solution with 8% gelatin to solidify, and stir for 10 min. ...

Embodiment 2

[0051] Embodiment 2: A method for preparing high-concentration and high-core-wall-ratio microcapsule emulsion by complex coacervation method.

[0052] A method for preparing high-concentration and high-core-wall-ratio microcapsule emulsions by composite coacervation method consists of the following steps:

[0053] Make gelatin and gum arabic into a solution with a concentration of 10%, and set aside.

[0054] The first step: under the condition of 40 ℃ ~ 45 ℃, add essential oil to the aqueous solution dissolved in gelatin and gum arabic to obtain a mixed solution; wherein, the mass ratio between gelatin and gum arabic is 1:1; gelatin and gum arabic The ratio of the sum of the mass of gelatin to the mass of essential oil is 1:4; the ratio of the mass of gelatin, acacia and essential oil to the mass of water is 35:98.

[0055] The second step: emulsifying the mixed solution obtained in the first step, so that the average particle size of the essential oil is 2.6-3.0 microns to ...

Embodiment 3

[0064] Embodiment three, a method for preparing high-concentration high-core-wall ratio microcapsule emulsion by composite coacervation method mainly consists of the following steps:

[0065] The preparation method of described microcapsule preparation liquid is made up of the following steps:

[0066] The first step: under the condition of 40°C-45°C, add an oil-soluble core material to the aqueous solution in which gelatin and gum arabic are dissolved to obtain a mixed solution; wherein, the mass ratio between gelatin and gum arabic is 0.85:0.85-0.9; The ratio of the mass sum of gelatin and gum arabic to the mass of oil-soluble core material is 1: 8; the ratio of the mass sum of gelatin, gum arabic and oil-soluble core material to the mass of water is 2:5;

[0067] The second step: emulsifying the mixed solution obtained in the first step, so that the average particle size of the oil-soluble core material is 0.5-10 microns to obtain an emulsion;

[0068] The third step: addi...

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Abstract

The invention discloses a method of taking natural materials (such as gelatin and Arabic gum) to prepare microcapsule emulsion with high-concentration and high core / wall ratio by adopting a complex coacervation method, comprising the following steps of: firstly, adding water in emulsify core materials and wall materials for diluting; then adjusting pH value below an isoelectric point of gelatin; absorbing with Arabic gum which has negative charges; after forming rudiment of microcapsule, jellying, coupling and solidifying at low temperature; and then adding special ternary dispersions to finish the preparation process of the microcapsule emulsion with high-concentration and high core / wall ratio. In the invention, natural wall materials of gelatin with high freezing power (the freezing power is more than 200) are adopted; complex condensing is carried out when pH is 3.7-5; non-formaldehyde cross-linking agent is added for solidifying; finally, a ternary dispersion system (lubricating agent, humectant and stabilizing agent) is adopted to prepare microcapsule stable emulsion of natural wall materials, which has more than 20% of concentration and 4-9:1 core / wall ratio.

Description

technical field [0001] The invention relates to a method for preparing high-concentration and high-core-wall-ratio microcapsule emulsion by a composite coagulation method, which belongs to the technical field of microcapsule preparation. Background technique [0002] Microcapsule technology is a relatively novel, widely used and rapidly developing new technology. Since the 1930s, after decades of continuous research and development, it has been widely used in pharmaceuticals, fertilizers, food, feed, fine chemicals and other fields. Microcapsule technology is the technology of embedding and sealing solid, liquid or gaseous substances in a kind of microcapsules, which can protect the wrapped materials and isolate them from the external unsuitable environment, so as to maintain the original Color, fragrance, performance and biological activity, to prevent the loss and destruction of substances. The diameter of microcapsule particles is generally in the range of 5 to 200 micr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/10
Inventor 蒋静孟凡翠马玉芹陈善樑
Owner GOLD HONG YE PAPER