Tea extract-containing microemulsion, preparation method and applications thereof

A technology of tea extract and microemulsion, which is applied in application, food preparation, food science, etc., can solve the problems of being easily affected by light, heat, oxygen and pH, low bioavailability, poor stability, etc., and achieve enhanced bioavailability , Expand the scope of application, the effect of strong anti-oxidation

Active Publication Date: 2014-09-03
杭州远圣茶能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, EGCG and TFDG have high polarity, strong water solubility, insoluble in oil, and are easily affected by light, heat, oxygen and pH, have poor stability and low bioavailability. Application in similar products and play better physiological and pharmacological activities
[0003] Chinese patent document CN102863478A discloses "the method for preparing fat-soluble tea polyphenols from water-soluble tea polyphenols", the method is to use acylation method to chemically modify tea polyphenols, because these acylation products have not been detected by NMR, IR Therefore, the actual structure and the proportion of each component cannot be determined. The product is actually a mixture, and the use of a large amount of organic solvents in the preparation will inevitably bring about solvent residue problems, and the safety needs to be verified. At the same time, due to the color and transparency of the product , clarity and other issues, the application area is narrow, and it cannot be used in edible oil.
[0004] Chinese patent literature CN101554192A and CN102580112A disclose respectively " a kind of preparation method of tea extract phospholipid complex " and " the method for EGCG phospholipid complex ", two kinds of preparation methods all utilize the amphiphilicity of phospholipid (both hydrophilic and hydrophilic Oily) characteristics, prepared into tea extract (or EGCG) phospholipid complex in a certain reaction system, to improve the fat solubility of tea extract (or EGCG), but, because tea extract (or EGCG) and phospholipids in the light, heat , oxygen or different acid-base environments are unstable, and phospholipids are easily absorbed by moisture and hydrolyzed, which will directly affect the storage, transportation and application of tea extract (or EGCG) phospholipid complexes

Method used

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  • Tea extract-containing microemulsion, preparation method and applications thereof
  • Tea extract-containing microemulsion, preparation method and applications thereof
  • Tea extract-containing microemulsion, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1. Prescription composition

[0053]

[0054]

[0055] 2. Preparation method

[0056] (1) Accurately weigh the prescription amount of EGCG, mix and dissolve it with water, add ascorbic acid and citric acid to adjust the pH of the solution to 4.2;

[0057] (2) Weigh the prescription amount of soybean phospholipid and absolute ethanol as the compound emulsifier, stir to dissolve;

[0058] (3) Add the EGCG aqueous solution of step (1) to the composite emulsifier at a speed of 10 mL / min, stir at 60°C for 45 minutes, and stir at 100 rpm to obtain an emulsified mixture;

[0059] (4) Mix ethyl oleate, caprylic acid, and glyceryl capsaicin evenly according to the prescription ratio to obtain the oil phase;

[0060] (5) Add the emulsified mixture to the oil phase of the formula, and continue to stir at 40°C and 500 rpm until a homogeneous and transparent solution is obtained.

[0061] For the water-oil-surfactant dispersion system, if it is a homogeneous system with transparent or nearly tr...

Embodiment 2

[0070] 1. The effect of synergist on the stability of EGCG in microemulsion

[0071] Prepare microemulsions containing different synergists (citric acid, ascorbic acid) to investigate the effects of ascorbic acid and citric acid on the stability of EGCG in the EGCG microemulsion system. See Table 2 for the microemulsion formula, and refer to Example 1 for the preparation method.

[0072] Air was constantly introduced into each microemulsion, and the oxidation of EGCG was accelerated at 120°C. The content of EGCG in different microemulsions was measured every 2 hours, and the effects of the addition of ascorbic acid and citric acid on the stability of EGCG content in microemulsions were compared. .

[0073] Table 2

[0074]

[0075] The result is Image 6 (The ordinate represents the content of EGCG in the microemulsion as a percentage of the content of EGCG before the treatment). As time goes by, the content of EGCG in the microemulsion is gradually oxidized and its content is gradual...

Embodiment 3

[0084] 1. Prescription composition

[0085]

[0086] Oleic acid polyethylene glycol glyceride (LABRAFIL M1944CS) 13%

[0087] Caprylic, glyceryl capsaicin 30.9%

[0088] Water1%.

[0089] 2. Preparation method

[0090] (1) Accurately weigh the prescription amount of TFDG, mix and dissolve with water, add ascorbic acid and citric acid to adjust the pH of the solution to 5.5;

[0091] (2) Weigh the prescription amount of soybean phospholipid and absolute ethanol as the compound emulsifier, stir to dissolve;

[0092] (3) Add the TFDG aqueous solution of step (1) to the composite emulsifier at a speed of 90 mL / min, stir at 40°C for 120 min, and stir at 300 rpm to obtain an emulsified mixture;

[0093] (4) Mix oleic acid polyethylene glycol glyceride (LABRAFIL M1944CS) with caprylic acid and capric acid glyceride according to the prescription ratio to obtain the oil phase;

[0094] (5) Add the emulsified mixture to the oil phase of the formula, and continue to stir at 60°C and 1000 rpm until a h...

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Abstract

The present invention discloses a tea extract-containing microemulsion, a preparation method and applications thereof. The tea extract-containing microemulsion comprises the following components by weight: 0.1% to 8% of tea extract, 30% to 70% of oil phase, 0.05% to 0.5% of synergistic agent, 10% to 50% of emulsifier, 0% to 20% of co-emulsifier and 1% to 5% of water; wherein the synergistic agent is ascorbic acid or/and citric acid, the tea extract is epigallocatechin gallate or/and theaflavin-3, 3'-digallate. The present invention also provides the preparation method and applications of the tea extract-containing microemulsion. The tea extract containing microemulsion has characteristics of uniform, transparent, stable property, strong oxidation resistance, and simple and controllable preparation method.

Description

Technical field [0001] The invention belongs to the technical field of microemulsified food processing, and particularly relates to a microemulsion containing tea extract and a preparation method and application thereof. Background technique [0002] EGCG (epigallocatechin gallate) and TFDG (theaflavin-3,3'-digallate) are characteristic monomer components in tea, because their chemical structure has more ortho-phenolic hydroxyl groups ( ≥3), so it has a strong ability to provide protons and shows excellent oxidation resistance. In addition, studies have confirmed that EGCG and TFDG also have significant pharmacological effects such as anti-cancer, anti-bacterial, anti-virus, anti-inflammatory, anti-cardio-cerebrovascular disease, anti-mutation, nerve regulation, anti-aging, and improvement of liver function. However, EGCG and TFDG are highly polar, highly water-soluble, hardly soluble in oil, and are easily affected by light, heat, oxygen and pH, and have poor stability and low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L1/29A23L3/3553A23L33/00
CPCA23L3/3472A23L3/3553A23L29/035A23L33/105A23V2002/00A23V2200/02A23V2200/222A23V2200/20A23V2250/02A23V2250/708
Inventor 李大伟张士康汪辉汪圣华朱跃进林梁鹏
Owner 杭州远圣茶能科技有限公司
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