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A kind of microcapsule and its preparation method and application

A technology of microcapsules and core materials, which is applied in the field of flavor and fragrance processing, and can solve problems such as uneven distribution, large size of microcapsules, and poor stability of microcapsules

Active Publication Date: 2021-06-08
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the preparation process of the existing essential oil microcapsules is complex, the prepared microcapsules are large in size and unevenly distributed, and the structure of the microcapsules is incomplete, resulting in poor stability of the microcapsules, the present invention provides an essential oil microcapsule and a preparation method thereof and application

Method used

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  • A kind of microcapsule and its preparation method and application
  • A kind of microcapsule and its preparation method and application
  • A kind of microcapsule and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0061] A preparation method of microcapsules:

[0062] Step 1. Weigh 1 g of polyvinyl alcohol solid and add it to a 100 ml beaker, add 70 ml of distilled water, place the beaker in a water bath at 30°C, and magnetically stir at a speed of 600 r / min for 5 min to obtain an aqueous emulsifier solution;

[0063] Step 2. Weigh 5g of hexamethylene diisocyanate trimer and 5g of Suyalan essential oil, add them into the emulsifier aqueous solution, add magnetons into the beaker, stir at a speed of 580r / min, and submerge the shearing head into the solution In the process, slowly increase the speed to 4800r / min at a speed of 500r / min per second, cut for 10 minutes, rise to 11000r / min and cut for 8min to obtain an emulsion;

[0064] Step 3. Place the emulsion in a collector-type constant temperature heating magnetic stirrer. When the temperature of the emulsion rises to 75°C, add 2ml of 1,3-butanediol dropwise under the condition of 680r / min. 18μL / s, continue to stir for 1h after the dro...

Embodiment 2

[0067] A preparation method of microcapsules:

[0068] Step 1. Weigh 1.5 g of solid polyvinyl alcohol and add it to a 100 ml beaker, add 70 ml of distilled water, place the beaker in a water bath at 30°C, and magnetically stir at a speed of 600 r / min for 5 min to obtain an emulsifier aqueous solution;

[0069] Step 2. Weigh 4.6g of hexamethylene diisocyanate trimer and 5.5g of rose essential oil, add them to the emulsifier aqueous solution, add magnetons into the beaker, stir at 550r / min, and submerge the shear head into the solution , slowly increase the speed to 5000r / min at a speed of 500r / min per second, cut for 8 minutes, rise to 12000r / min and cut for 7 minutes to obtain an emulsion;

[0070] Step 3. Put the emulsion in a heat-collecting constant temperature heating magnetic stirrer. When the temperature of the emulsion rises to 70°C, add 4.6ml of 1,3-butanediol dropwise under the condition of 650r / min. Acceleration is 20μL / s, continue to stir for 50min after the dropwi...

Embodiment 3

[0073] A preparation method of microcapsules:

[0074] Step 1. Weigh 1.3g of polyvinyl alcohol solid and add it to a 100ml beaker, add 70ml of distilled water, place the beaker in a water bath at 30°C, and magnetically stir at a speed of 600r / min for 5min to obtain an emulsifier aqueous solution;

[0075] Step 2. Weigh 6 g of hexamethylene diisocyanate trimer and 4.8 g of lavender essential oil, add them into the emulsifier aqueous solution, add magnetons in the beaker, and stir at a speed of 600 r / min, and submerge the shearing head in the solution. Slowly increase the speed to 4500r / min at a speed of 500r / min per second, shear for 12 minutes, increase to 10000r / min and shear for 10min to obtain an emulsion;

[0076] Step 3. Place the emulsion in a heat-collecting constant temperature heating magnetic stirrer. When the temperature of the emulsion rises to 80°C, add 2ml of 1,3-butanediol dropwise under the condition of 700r / min. 15μL / s, continue to stir for 70min after the dr...

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Abstract

The invention provides a microcapsule and its preparation method and application. The wall material of the microcapsule includes isocyanate and nano titanium dioxide. Isocyanate is selected as the wall material of the microcapsules. Under the action of emulsifier and mechanical shear, the core material forms sub-micron oil droplets. After adding a curing agent, the wall material polymerizes on the surface of the oil droplets for coating. Nano TiO 2 Disperse liquid so that it is loaded onto the surface of the cyst wall. The preparation method of microcapsules provided by the present invention can realize the microencapsulation of essential oils, and can promote the release of fragrance under sunlight irradiation. Compared with the prior art, the experimental process is obviously shortened. The synthesis process does not need to adjust the pH of the solution, and the microcapsules can be obtained by simple centrifugation. After heat drying, the particle size is concentrated at about 0.581 μm, the essential oil embedding rate is 78.8%, and the essential oil retention rate can reach 92.13% after three months of storage at room temperature.

Description

technical field [0001] The invention relates to the technical field of essence and fragrance processing, in particular to a microcapsule and its preparation method and application. Background technique [0002] Essential oil is an oily substance with characteristic aroma obtained from the flowers, leaves, roots, bark, stems, branches, fruits, seeds and other parts of aromatic plants by distillation, pressing, extraction, adsorption and other methods. They are mixtures of many compounds, mainly terpene hydrocarbons, aromatic hydrocarbons, alcohols, aldehydes, ketones, ethers, esters and phenols. When essential oil is used in the aroma finishing of textiles, it can endow clothes, pillow covers, ties and other fabrics with soothing, sedative, hypnotic, and even physical therapy and other health effects. Its special aroma can also make people feel happy, cover up bad smells, and improve their own image . However, due to its shortcomings such as volatile and unstable, the fragr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02C11B9/00D06M23/12
Inventor 张维皇甫志杰姚继明
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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