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Stable phytosterol nanometer emulsion compounded by soy protein-stevioside, and preparation method and application thereof

A technology of steviol glycosides and phytosterols is used in the preparation of phytosterol nanoemulsions and in the field of phytosterol-rich nanoemulsions, which can solve the limitations of wide application of water-based emulsions, demulsification, flocculation, stratification, and oxidative deterioration of powder products, etc. problems, to achieve good storage stability, uniform particles, and improve water solubility.

Active Publication Date: 2018-10-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the proportion of the oil phase in the water-based emulsion is 50-90wt%, and the emulsion is prone to large droplets and phase separation, resulting in instability of the emulsion, making the emulsion prone to demulsification, flocculation, and stratification during storage, sales, and transportation. and other phenomena, which are restricted in food applications and reduce the shelf life of emulsion products
In addition, the high oil phase of the emulsion should not be made into powder by spray drying, because the oil phase is too high, the spray-dried product is easy to oil out, and the powder product is easy to oxidize and deteriorate quickly, which limits the wide application of water-based emulsion in the food industry.

Method used

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  • Stable phytosterol nanometer emulsion compounded by soy protein-stevioside, and preparation method and application thereof
  • Stable phytosterol nanometer emulsion compounded by soy protein-stevioside, and preparation method and application thereof
  • Stable phytosterol nanometer emulsion compounded by soy protein-stevioside, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] (1) Soybean protein isolate was dissolved in 10mM phosphate buffer (pH7.0), stirred at room temperature for 2h, left overnight, heated in a water bath at 95°C for 30min, and cooled immediately to obtain a 1wt% soybean protein isolate solution; steviol glycoside was dissolved In 10 mM phosphate buffer (pH7.0), stir at room temperature for 1 h, adjust the pH to 7.0-7.1, and obtain a 2 wt % steviol glycoside solution.

[0055] (2) Mix the above-mentioned soybean protein isolate solution and steviol glycoside solution to obtain the aqueous phase of the composite stable system, wherein the soybean protein solution accounts for 0.5 wt% of the composite solution, and the steviol glycoside solution accounts for 1 wt% of the composite solution.

[0056] (3) adding phytosterols into sunflower oil, dispersing and dissolving at 90-99° C. to obtain an oil phase containing 10 wt % phytosterols.

[0057] (4) According to the mass ratio of oil phase: water phase = 1:9, the oil phase di...

Embodiment 2

[0064]Soybean protein isolate was dissolved in 10mM phosphate buffer (pH7.0), stirred at room temperature for 1.5h, left overnight, heated in a water bath at 95°C for 30min, and immediately cooled to obtain a 4wt% soybean protein isolate solution;

[0065] Steviol glycosides were dissolved in 10 mM phosphate buffer (pH 7.0), stirred at room temperature for 1 h, and the pH was adjusted to 7.0-7.1 to obtain a 4 wt% steviol glycoside solution.

[0066] The water phase (mass percentage) was prepared according to the ratio in Table 1.

[0067] Table 1

[0068]

[0069] The phytosterol is added into the sunflower oil, dispersed and dissolved at 90-99° C. to obtain an oil phase containing 10 wt % phytosterol.

[0070] Add the oil phase dissolved in phytosterol into the water phase according to the mass ratio of oil phase: water phase = 1:9. After pretreatment with a homogenizer at 20,000 rpm for 1 min, use high-pressure micro-jet treatment with a pressure of 100 MPa. Three times...

Embodiment 3

[0077] Soybean protein isolate was dissolved in 10mM phosphate buffer (pH7.0), stirred at room temperature for 2.5h, left overnight, heated in a water bath at 95°C for 30min, and immediately cooled to obtain a 2wt% soy protein isolate solution;

[0078] Steviol glycosides were dissolved in 10 mM phosphate buffer (pH 7.0), stirred at room temperature for 1.5 h, and the pH was adjusted to 7.0-7.1 to obtain a 2 wt % steviol glycoside solution.

[0079] Mix the above soybean protein isolate solution and steviol glycoside solution to prepare the emulsion water phase, the soybean protein isolate solution accounts for 0.5wt% of the water phase, and the steviol glycoside solution accounts for 1wt% of the water phase. Three aqueous phases were prepared under the same operation and the same environment.

[0080] Add phytosterols to three parts of sunflower oil, all dispersed and dissolved at 98° C. to obtain oil phases containing 0wt%, 1wt% and 1.5wt% phytosterols respectively.

[0081...

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Abstract

The invention discloses stable phytosterol nanometer emulsion compounded by soy protein-stevioside, and a preparation method and application thereof. The method comprises the steps of mixing a soy isolate protein solution and a stevioside solution to prepare a composite stable system; dissolving phytosterol into sunflower seed oil being 90 to 99 DEG C to obtain an oil phase; adding thw oil phase dissolved with the phytosterol into a water phase of soy protein-stevioside; controlling the mass ratio of the oil phase to the water phase to be 10:90-50:50; after the homogenizing, performing ultrasonic treatment or high-pressure micro jet flow treatment to obtain the stable phytosterol nanometer emulsion compounded by soy protein-stevioside. A powder product with high redissolving performance loaded with phytosterol can be prepared through spray drying treatment on the nanometer emulsion. The process conditions are simple and mild; the natural effect and safety are realized; the fast continuous production can be performed; products applied to food, medicine and cosmetics can be prepared through operating and controlling the process conditions; the industrialized and scaled application values are realized.

Description

technical field [0001] The invention relates to a nanoemulsion rich in phytosterol, in particular to a preparation method of a phytosterol nanoemulsion stabilized by soybean protein-steviol glycoside; it belongs to the technical field of food, medicine and cosmetic processing. Background technique [0002] Nowadays, the aging population in our country is serious, and the diseases of the elderly are also increasing day by day. Cardiovascular disease is one of the common diseases among the elderly, and it has become the leading cause of human death. Most of the clinical treatment is strictly dependent on drugs, and the side effects of various lipid-lowering and cholesterol-lowering drugs make their treatment and application extremely restricted. Therefore, it is very necessary to vigorously develop functional foods that can lower cholesterol and carry out non-drug treatment for human health. [0003] A large number of animal experiments and human clinical experiment data show...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L33/11A23L33/125A23L33/185A23L5/30A23L2/38A23L27/60A23C9/152A23L11/65
CPCA23C9/152A23C9/1526A23L2/38A23L5/32A23L27/60A23L33/11A23L33/125A23L33/185A23V2002/00A23V2250/21368A23V2250/5488A23V2300/48
Inventor 万芝力李青杨晓泉
Owner SOUTH CHINA UNIV OF TECH
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