Preparation method of low-ester pectin stable emulsion

A low-ester pectin, emulsion technology, applied in skin care preparations, pharmaceutical formulations, cosmetic preparations, etc., can solve the problems of affecting the stability of the emulsion, inactivation of active ingredients, coalescence and flocculation, etc., to improve the stability. As well as bioavailability, enhance antioxidant effect

Active Publication Date: 2018-09-14
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] EGCG, as a highly functional polyphenolic substance, is often added to various products as a functional factor. However, EGCG is sensitive to light, heat and acid, and is easily oxidized. Its application in many aspects
Through the traditional emulsion preparation technology, although its stability can be improved, coalescence and flocculation still occur between droplets in the

Method used

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  • Preparation method of low-ester pectin stable emulsion
  • Preparation method of low-ester pectin stable emulsion
  • Preparation method of low-ester pectin stable emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Pretreatment: Mix 1g EGCG and 0.8g phospholipid, add 20ml of distilled water, rotate and stir at room temperature until the reaction solution is clear and transparent, concentrate under reduced pressure to 5ml, add petroleum ether, leave it overnight, collect the solid by filtration and freeze-dry to obtain EGCG phospholipid Complex.

[0026] Preparation of emulsion: 100mL soybean oil containing 0.5g vitamin C was used as oil phase, 700mL distilled water containing 0.5g vitamin E was used as water phase, 1g EGCG phospholipid complex and 100mL oil phase were added to 700mL water phase, and then mass The fraction is 0.2% low-ester pectin aqueous solution 300mL, using a high-speed shearer, shearing at a speed of 25000r / min for 3min, to obtain a coarse emulsion. The crude emulsion was further treated with a high-pressure homogenizer and circulated twice at 80 MPa to obtain a low-ester pectin emulsion.

Embodiment 2

[0031] Pre-treatment: Mix 1g EGCG and 0.9g phospholipid, add 20ml of distilled water, rotate and stir at room temperature until the reaction solution is clear and transparent, concentrate under reduced pressure to 5ml, add petroleum ether, leave it overnight, collect by filtration and freeze-dry to obtain EGCG phospholipid Complex.

[0032] Preparation of emulsion: take 100mL soybean oil mixed with 0.5g vitamin C as the oil phase, take 800mL distilled water mixed with 0.5g vitamin E as the water phase, add 1g EGCG phospholipid complex and 100mL oil phase to the 800mL water phase, and then add mass 350 mL of low-ester pectin aqueous solution with a fraction of 0.3% was sheared at a speed of 25,000 r / min for 3 min with a high-speed shear to obtain a coarse emulsion. The crude emulsion was further treated with a high-pressure homogenizer and circulated twice at 80 MPa to obtain a low-ester pectin emulsion.

Embodiment 3

[0037] Pretreatment: Mix 1g EGCG and 1g phospholipid, add 20ml of distilled water, rotate and stir at room temperature until the reaction solution is clear and transparent, concentrate under reduced pressure to 5ml, add petroleum ether, leave it overnight, collect by filtration and freeze-dry to obtain EGCG phospholipid complex thing.

[0038]Preparation of the emulsion: take 100mL soybean oil mixed with 0.5g vitamin C as the oil phase, and 900mL distilled water mixed with 0.5g vitamin E as the water phase, add 1g EGCG phospholipid complex and 100mL oil phase to the 900mL water phase, and then add mass 400 mL of low-ester pectin aqueous solution with a fraction of 0.4% was sheared for 3 min at a speed of 25,000 r / min by a high-speed shearer to obtain a coarse emulsion. The crude emulsion was further treated with a high-pressure homogenizer and circulated twice at 80 MPa to obtain a low-ester pectin emulsion.

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Abstract

The invention provides a preparation method of a low-ester pectin stable emulsion. The method comprises the following steps that (1) EGCG and phospholipid are mixed in mass ratio of 1:0.8-1, distilledwater is added, rotation and stirring are carried out at room temperature until the reaction liquid is clear and transparent, decompression concentration is carried out, petroleum ether is added intothe concentrate, overnight aging is carried out, solid is filtered and collected, and freeze drying is carried out to obtain an EGCG phospholipid complex; (2) soybean oil containing vitamin C servesas an oil phase, distilled water containing vitamin E serves as a water phase, the EGCG phospholipid complex and the oil phase are added into the water phase, a low-ester pectin water solution with mass fraction of 0.2%-0.5% is added into the mixed system, the mixture is cut at high speed to obtain a crude emulsion, high pressure homogenization is carried out on the crude emulsion to obtain the low-ester pectin stable emulsion. The provided preparation method of the pectin stable natural emulsion improves the stability and oxidation resistance of the emulsion.

Description

(1) Technical field: [0001] The invention relates to a production method of low-ester pectin-stabilized emulsion. (two) background technology: [0002] Pectin is a soluble dietary fiber of non-starch polysaccharides, which has gel properties and has been widely used as gelling agent, thickener and stabilizer. According to relevant foreign research reports, pectin has a good preventive and curative effect on tumors and coronary heart diseases, which are known as "human killers", and has a variety of important functional properties. And, compared with high-ester pectin, high Ester pectin can form a gel as long as it coexists with metal ions. This gel will reversibly become liquid after heating or stirring, and it can return to the original gel state after stopping stirring or cooling. Due to this characteristic , low-ester pectin meets the requirements of cosmetic consumers for smearability. Epigallocatechin gallate (EGCG) is an ingredient extracted from Chinese green tea, wh...

Claims

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Application Information

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IPC IPC(8): A61K8/92A61K8/73A61K8/67A61K8/55A61K8/49A61K8/04A61Q19/00A61Q19/08
CPCA61K8/04A61K8/498A61K8/553A61K8/676A61K8/678A61K8/73A61K8/922A61Q19/00A61Q19/08
Inventor 邵平王培冯洁茹
Owner ZHEJIANG UNIV OF TECH
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