Food-grade evening primrose oil microemulsion freeze-dried powder and preparation method thereof

A technology of oil microemulsion and freeze-dried powder, which is applied in the production/processing of edible oil/fat, can solve problems such as unfavorable storage and transportation, unstable structure, and impact on encapsulation rate, and achieves convenience for storage and transportation, The effect of fast reconstitution and easy operation

Inactive Publication Date: 2016-04-20
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the influence of external conditions, other substances in the environment and the properties of encapsulated functional factors, liquid microemulsions are not conducive to storage and transportation in liquid state; the structure of microemulsions is also greatly affected by temperature. In a high temperature environment, the structure will become unstable and easy to oxidize, which will affect the encapsulation efficiency after oxidation

Method used

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  • Food-grade evening primrose oil microemulsion freeze-dried powder and preparation method thereof
  • Food-grade evening primrose oil microemulsion freeze-dried powder and preparation method thereof
  • Food-grade evening primrose oil microemulsion freeze-dried powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 804.55g of Tween and 0.455g of lauric acid to prepare a mixed emulsifier, then add 0.825g of evening primrose oil in constant

[0029] Stir on a warm magnetic stirrer, set the temperature to room temperature (25°C), after the emulsifier and oil have been fully mixed, add water drop by drop, and continue stirring until a microemulsion is formed. Dilute the microemulsion so that the concentration reaches about 0.028g / mL, then stop stirring, and let it stand for use. Add 6.6g of mannitol to the evening primrose oil microemulsion, mix well, put it into a deep freezer at -40°C and freeze for 12 hours. Then put it into a vacuum freeze dryer whose temperature has dropped to -60° C., take it out after freeze-drying for 48 hours, and put the microemulsion freeze-dried powder into a desiccator to store at room temperature.

Embodiment 2

[0031] Weigh 804.69g of Tween and 0.31g of lauric acid to prepare a mixed emulsifier, then add 1.25g of evening primrose oil in constant

[0032] Stir on a warm magnetic stirrer with the temperature set at 45°C. After the emulsifier and oil are fully mixed, add water drop by drop and continue stirring until a microemulsion is formed. Dilute the microemulsion and add 50mL of water, then stop stirring. Add 8 g of mannitol and 2 g of trehalose to the evening primrose oil microemulsion, mix well, and put it into a deep freezer at -40° C. for 12 hours. Then put it into a vacuum freeze dryer whose temperature has dropped to -60° C., take it out after freeze-drying for 48 hours, and put the microemulsion freeze-dried powder into a desiccator to store at room temperature.

Embodiment 3

[0034] Weigh 804.5g of Tween and 0.5g of lauric acid to prepare a mixed emulsifier. Dissolving excess zeaxanthin in evening primrose

[0035] In the oil, take 1.2g of the supernatant after centrifugation and stir on a constant temperature magnetic stirrer with the temperature set at 35°C. After the emulsifier and the oil are fully mixed, add water drop by drop and continue stirring until a microemulsion is formed. After diluting the microemulsion and adding 50mL of water, stop stirring, add 8g of mannitol and 2g of bovine serum albumin to the evening primrose oil microemulsion, mix well and put it into a deep freezer at -40°C for 12h. Then put it into a vacuum freeze dryer whose temperature has dropped to -60° C., take it out after freeze-drying for 48 hours, and put the microemulsion freeze-dried powder into a desiccator to store at room temperature.

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Abstract

The invention relates to food-grade evening primrose oil micro-emulsion freeze-dried powder and a preparation method thereof. The freeze-dried powder comprises the following raw materials in percentage by weight: 5-8 percent of evening primrose oil, 30-50 percent of an emulsifier and 40-60 percent of a freeze-drying protective additive. The preparation method comprises the following steps: preparing the components into micro-emulsion, and drying at low temperature by utilizing a vacuum freezing technology to prepare the evening primrose oil micro-emulsion freeze-dried powder which is high in stability and small in toxic and side effects and is applicable to foods and health-care foods. The powder can be preserved for a long time at room temperature, the original properties of the micro-emulsion are kept to the greatest degree after freeze-drying, the powder can be rapidly restored after being added to water, readily oxidizable substances are well protected, and storage, transport and sales are promoted. The evening primrose oil micro-emulsion freeze-dried powder can serve as a carrier of other instable or difficultly soluble nutrient elements or medicines, and the absorption and utilization rate is increased. The preparation process of the product is simple and easy to operate.

Description

technical field [0001] The invention belongs to the field of food processing, in particular to food-grade microemulsion freeze-dried powder containing evening primrose oil and a preparation method thereof. Background technique [0002] In recent years, people pay more and more attention to the effect of polyunsaturated fatty acids (polyunsatu-ratedfattyacids, PUFA) on human health. Evening primrose oil contains a lot of unsaturated fatty acids, such as oleic acid, linoleic acid, linolenic acid, etc., the main components of which are 70% linolenic acid and 7%~10% γ-linolenic acid (γ-linolenic acid, cis , 6,9,12-octadecatrienoic acid). Although γ-linolenic acid is not an essential fatty acid, it has a variety of biological activities and is known as "the protagonist of functional food in the 21st century". Evening primrose oil can treat many kinds of diseases, such as regulating lipids in the blood, it has significant curative effect on coronary artery infarction, atheroscle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23D7/04
Inventor 吴红艳孙长豹
Owner QIQIHAR UNIVERSITY
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