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Beta-carotene-starch-chitosan microcapsule and preparation method thereof

A technology of chitosan microcapsules and carotene, which is applied in the direction of microcapsule preparation, microsphere preparation, food forming, etc., and can solve the problems of photo-oxygen unstable core material, high core material loss rate, and limited core material content, etc. , to achieve the effect of complete crystal structure, low loss rate and low recombination temperature

Inactive Publication Date: 2021-09-03
SHENYANG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cyclodextrin is a particle obtained by fully mixing the emulsified and homogeneous core material and wall material. It has strong protective effect but poor water solubility.
Starch-based microcapsules are powdery granules formed by adding starch milk and core material in a certain proportion at a certain temperature, which has a protective effect on the light-oxygen unstable core material, but the wall material is mostly amylose, which limits the content of the core material. And the process of compounding with the core material often involves high temperature treatment, and the loss rate of the core material is high

Method used

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  • Beta-carotene-starch-chitosan microcapsule and preparation method thereof
  • Beta-carotene-starch-chitosan microcapsule and preparation method thereof
  • Beta-carotene-starch-chitosan microcapsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Accurately weigh 0.06g of cornstarch (amylose 20-25%) and dissolve it in 2mL of sodium hydroxide solution, keep it in a water-bath shaker at 65°C and 250r / min for 1h, then add 2mL of 0.3mg / mL β-carotene absolute ethanol solution, keep warm for 1h, adjust the pH to neutral with hydrochloric acid, cool to room temperature and centrifuge to remove the supernatant, wash with absolute ethanol, dry at low temperature to obtain β-carotene microcapsule powder, add 5mL to it. .3% chitosan solution, fully mixed, vacuum freeze-dried to obtain β-carotene-starch-chitosan microcapsules. The β-carotene in the microcapsules was extracted with acetone-petroleum ether (1:1), the absorbance was measured, and its content was calculated.

Embodiment 2

[0039] Accurately weigh 0.06g of cornstarch (1-5% amylose content) and dissolve it in 2mL of sodium hydroxide solution, keep it in a water-bath shaker at 65°C and rotate at 250r / min for 1h, then add 2mL of 0.3mg / mL dropwise β-carotene absolute ethanol solution, keep warm for 1h, adjust the pH to neutral with hydrochloric acid, cool to room temperature and centrifuge to remove the supernatant, wash with absolute ethanol, dry at low temperature to obtain β-carotene microcapsule powder, add 5mL of 0.3% chitosan solution, fully mixed, and vacuum freeze-dried to obtain β-carotene-starch-chitosan microcapsules. The β-carotene in the microcapsules was extracted with acetone-petroleum ether (1:1), the absorbance was measured, and its content was calculated.

Embodiment 3

[0041] Accurately weigh 0.06g of cornstarch (amylose 55-75%) and dissolve it in 2mL of sodium hydroxide solution, keep it in a water-bath shaker with a temperature of 65°C and a speed of 250r / min for 1h, then add 2mL of 0.3mg / mL β-carotene absolute ethanol solution, keep warm for 1h, adjust the pH to neutral with hydrochloric acid, cool to room temperature and centrifuge to remove the supernatant, wash with absolute ethanol, dry at low temperature to obtain β-carotene microcapsule powder, add 5mL to it. .3% chitosan solution, fully mixed, vacuum freeze-dried to obtain β-carotene-starch-chitosan microcapsules. The β-carotene in the microcapsules was extracted with acetone-petroleum ether (1:1), the absorbance was measured, and its content was calculated.

[0042] refer to figure 1 , is the stability result chart of β-carotene in acidic environment, neutral environment and alkaline environment. By standing for 2 hours, measuring the absorbance and calculating the retention rate...

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Abstract

The invention belongs to the technical field of microcapsule preparation, and particularly relates to a beta-carotene-starch-chitosan microcapsule and a preparation method thereof. The preparation method comprises the following steps: compounding prepared alkaline starch milk with beta-carotene dispersed in alcohol at low temperature, conducting heat preservation for a period of time, centrifuging, washing, removing supernatant and carrying out low-temperature drying to obtain a primary inclusion; and adding a chitosan solution into a certain mass of the primary inclusion, fully and uniformly mixing, and carrying out vacuum freeze drying to obtain the beta-carotene-starch-chitosan microcapsule. According to the method provided by the invention, embedding is carried out in an alkaline environment, the beta-carotene is stable and relatively high in loading capacity, the used wall material is starch with different straight chain contents, and the preparation is simple.

Description

technical field [0001] The invention belongs to the technical field of microcapsule preparation, and in particular relates to a beta-carotene-starch-chitosan microcapsule and a preparation method. Background technique [0002] β-carotene is one of the oil-soluble pigments that widely exist in nature. It is a natural antioxidant and an important nutrient V for the human body. A It is rich in many natural foods such as carrots, spinach, papaya, mango, etc. However, it contains a large amount of unsaturated double bonds, and light, heat, oxygen, etc. will promote its oxidative degradation, which greatly limits the scope of application. Choosing an appropriate delivery system is one of the key research directions. [0003] At present, the main β-carotene delivery systems include liposomes, emulsions, cyclodextrins and starch-based microcapsules. Liposome is an ultra-miniature sphere made by encapsulating the core material in the middle of a film formed by lipid bilayers such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L29/30A23L33/105A23L5/44A23P10/30B01J13/02
CPCA23L29/30A23L33/105A23L5/44A23P10/30B01J13/02A23V2002/00A23V2250/211A23V2250/511A23V2250/5118
Inventor 李苏红娄朋举胡晓沛李拖平杨喜
Owner SHENYANG AGRI UNIV
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