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High internal phase gel-like zein Pickering emulsion and preparation method thereof

A technology of zein and high internal phase, applied in high internal phase gel-like zein Pickering emulsion and its preparation, field of zein Pickering emulsion

Inactive Publication Date: 2017-04-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because although zein is an amphiphilic protein that can self-assemble into nanoparticles, the isoelectric point of zein is around 6.2 and has strong hydrophobicity, which makes phase inversion very easy to occur in the process of forming a high internal phase emulsion.

Method used

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  • High internal phase gel-like zein Pickering emulsion and preparation method thereof
  • High internal phase gel-like zein Pickering emulsion and preparation method thereof
  • High internal phase gel-like zein Pickering emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Accurately weigh 1g of zein and dissolve it in 40ml of 70% ethanol solution;

[0041]Dissolve 0.2g of pectin in 100ml of distilled water, pour the zein alcohol solution into the pectin solution while homogenizing, homogenize at 6000rpm for 4min, and rotate at 40°C and 0.1Mpa vacuum for 40min; the obtained solution is at 10000rpm Centrifuge for 10 minutes to remove insoluble precipitates;

[0042] Adjust the pH value of the solution after centrifugation to be 3.0, 3.8 (original pH), 4.0, 5.0, and 6.0. Take 2ml of solutions with different pH values ​​and mix them with 8ml corn oil for shear emulsification. The shear emulsification speed is 12000rpm and the time is 60s. A zein high internal phase Pickering emulsion was obtained.

[0043] In this embodiment, high internal phase Pickering emulsions with pH values ​​of 3.0, 4.0, 5.0, and 6.0 are obtained by adjusting the pH value of the solution, and the state of the emulsion after being newly prepared and after 10 days is o...

Embodiment 2

[0054] Accurately weigh 1g of zein and dissolve it in 40ml of 70% ethanol solution;

[0055] Dissolve 0.2g of pectin into 100ml of distilled water, pour the zein alcohol solution into the pectin solution while homogenizing, homogenize at 6000rpm for 4min, rotate and evaporate at 40℃, 0.1Mpa vacuum for about 40min, so that the volume of the solution was 50 g, and the resulting solution was centrifuged at 10,000 rpm for 10 min to remove insoluble precipitates;

[0056] Adjust the pH of the solution after centrifugation to be 3.0, 4.0, and 5.0 respectively. Take 2ml of solutions with different pH values ​​and mix them with 8ml of corn oil for shear emulsification. Pickering Lotion. Take 2ml of the emulsion and centrifuge at 10000rpm for 2min.

[0057] This embodiment characterizes its centrifugal stability by observing the state of the emulsion after centrifugation, such as Figure 5 shown.

Embodiment 3

[0063] Accurately weigh 1g of zein and dissolve it in 40ml of 70% ethanol solution;

[0064] Dissolve 0.5g of pectin into 100ml of distilled water, pour the zein alcohol solution into the pectin solution while homogenizing, homogenize at 6000rpm for 4min, and rotate at 40°C and 0.1Mpa vacuum for 40min; the obtained solution is at 10000rpm Centrifuge for 10 minutes to remove insoluble precipitates;

[0065] After adjusting the centrifugation, the pH value of the solution is 3.0, 3.8 (original pH), 4.0, 5.0 respectively, and 2ml of solutions with different pH values ​​are mixed with 8ml corn oil respectively for shear emulsification, the shear emulsification speed is 12000rpm, and the time is 60s to obtain corn Glamin High Internal Phase Pickering Emulsion.

[0066] Take 2ml of the prepared emulsions with different pH to test the rheological properties respectively. The diameter of the plate used is 27.83, the temperature is 25°C, and the stress scanning frequency is set to 1Hz...

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Abstract

The invention discloses a high internal phase gel-like zein Pickering emulsion and a preparation method thereof. The preparation method comprises (1) dissolving zein in an alcohol solution, (2) preparing a pectin aqueous solution, (3) pouring the solution obtained by the step (1) into the pectin aqueous solution and carrying out homogenization and rotary evaporateion, (4) adjusting the pH of the solution obtained by the step (3) to 3.0 to 5.0, and (5) mixing the solution and oil and carrying out shearing emulsification to obtain the high internal phase gel-like zein Pickering emulsion. The high internal phase gel-like zein Pickering emulsion has high stability and good viscoelasticity and can embed a large amount of oil. The preparation method has the advantages of low requirements on equipment, simple processes and operation easiness. The preparation method has a good prospect in the application of a novel nutrient deliverying carrier and a food structure modification base material.

Description

technical field [0001] The present invention relates to zein Pickering emulsion, in particular to a high-internal-phase gel-like zein Pickering emulsion and its preparation method. All components of the invention are edible natural ingredients, which belong to the deep processing of farmers' products and the food industry technology field. Background technique [0002] At present, shortening, margarine, mayonnaise, etc. used in my country's food industry are all semi-solid or solid oils with specific crystal forms, which have properties such as plasticity and shortening, but at the same time contain harmful ingredients-trans fatty acids (TFAs). Excessive consumption of foods containing TFAs can lead to arteriosclerosis, cardiovascular and cerebrovascular diseases. Therefore, TFAs have become a research hotspot in the field of food health in recent years. In 2015, the U.S. Food and Drug Administration announced a total ban on artificial trans acids after three years. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L29/00A23L29/231A61K47/42A61K47/36B01F3/08A61K8/92A61K8/73A61K8/64A61Q19/00
CPCA61K47/36A61K47/42A61Q19/00A61K8/645A61K8/73A61K8/922A23V2002/00A61K2800/10B01F23/40A23V2200/228A23V2250/5482A23V2250/5072
Inventor 尹寿伟吴滋灵杨晓泉
Owner SOUTH CHINA UNIV OF TECH
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