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Water-in-oil type purple sweet potato pigment micro-emulsion and preparation method thereof

A purple sweet potato pigment, water-in-oil technology, applied in the field of microemulsion, can solve the problems of limited use, little research, difficult to adjust the interface radius and fluidity, etc., and achieve the effect of cost saving, bright and stable color

Inactive Publication Date: 2016-03-16
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are multiple phenolic hydroxyl groups in purple sweet potato pigment, which makes it highly hydrophilic. Therefore, the current research on the physiological activity and product development of purple sweet potato pigment is mainly concentrated in the aqueous solution system, and the research on purple sweet potato pigment in the oil system Very little, so that the application of purple sweet potato pigment in edible oil and fat food has been greatly restricted
[0004] Microemulsion is a transparent or translucent dispersion system that is spontaneously formed by oil phase, water phase, surfactant and co-surfactant in an appropriate proportion, with uniform dispersion, low viscosity, thermodynamics and dynamics stability. Adding water-soluble purple sweet potato pigment to prepare a water-in-oil microemulsion can solve the problem of its limited use in edible oils, but the particle radius of the dispersed phase of the microemulsion is very small, generally between 10-100nm, and Most edible oils and fats contain long hydrocarbon chains, and it is difficult to adjust the inherent radius and fluidity of the interface

Method used

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  • Water-in-oil type purple sweet potato pigment micro-emulsion and preparation method thereof
  • Water-in-oil type purple sweet potato pigment micro-emulsion and preparation method thereof
  • Water-in-oil type purple sweet potato pigment micro-emulsion and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1): raw materials:

[0029] (2): Preparation method:

[0030] 1) The purple sweet potato pigment solid powder in the raw material ratio is mixed with water to form a purple sweet potato pigment aqueous solution, and then a co-surfactant is added to form the water phase in the microemulsion system.

[0031] 2) The oil phase in the microemulsion liquid is formed after the oil is mixed with the surfactant.

[0032] 3) Add the aqueous phase mixture formed in step 1) dropwise at a speed of 300r / min to the oil phase in the microemulsion system formed in step 2), and stir evenly.

[0033] The appearance of the microemulsion prepared by the present invention is clear and transparent, and the content of purple sweet potato pigment is high. Further, the stability analysis of the microemulsion product of this embodiment is carried out, and the microemulsion is placed in a 28°C incubator for 28 days. Delamination and particle aggregation appear, and the stability is good.

Embodiment 2

[0035] (1): raw materials:

[0036] (2): The preparation method is the same as in Example 1.

[0037] The appearance of the microemulsion prepared by the present invention is clear and transparent, and the content of purple sweet potato pigment is high. Further, the stability analysis of the microemulsion product of this embodiment is carried out, and the microemulsion is placed in a 28°C incubator for 28 days. Delamination and particle aggregation appear, and the stability is good.

Embodiment 3

[0039] (1): raw materials:

[0040] (2): The preparation method is the same as in Example 1.

[0041] The appearance of the microemulsion prepared by the present invention is clear and transparent, and the content of purple sweet potato pigment is high. Further, the stability analysis of the microemulsion product of this embodiment is carried out, and the microemulsion is placed in a 28°C incubator for 28 days. Delamination and particle aggregation appear, and the stability is good.

[0042] At the same time, the microemulsion was diluted 300 times by volume with absolute ethanol and filtered through a 220nm organic membrane, and the particle size value of the microemulsion was measured by laser light scattering. The particle size of the microemulsion system is 31.2nm, less than 100nm, and its particle size distribution is as follows: figure 1 shown. The particle distribution of the microemulsion system is concentrated, which meets the requirements of the microemulsion. ...

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Abstract

The invention relates to the field of micro-emulsions, in particular to a water-in-oil type purple sweet potato pigment micro-emulsion and a preparation method thereof. According to the technical scheme for achieving the targets of the invention, the water-in-oil type purple sweet potato pigment micro-emulsion is prepared from the following raw materials in percentage by weight: 31.6%-46.4% of surfactant, 10.5%-12.6% of cosurfactant, 31.0%-47.5% of grease, 1.73%-2.1% of purple sweet potato pigment, and 8.7%-10.5% of water, wherein the surfactant is a combinational surfactant of Span80 and Tween80, and the weight ratio is (1:1) to (7:3). A self micro-emulsification preparation method is adopted to prepare the transparent, stable and carmine water-in-oil type purple sweet potato pigment micro-emulsion; and a basis is laid for development and application of the subsequent purple sweet potato pigment in fatty food.

Description

technical field [0001] The invention relates to the field of microemulsions, in particular to a water-in-oil type purple sweet potato pigment microemulsion and a preparation method thereof. Background technique [0002] Purple sweet potato pigment (PSPC, purple sweet potato colorant) extracted from the roots, stems and leaves of purple sweet potato has bright and natural color, non-toxic, no special smell, has the functions of treating obesity, protecting damaged liver, preventing liver insulin resistance, anti-oxidation, It is an ideal natural food coloring for repairing damaged memory and other functions. [0003] There are multiple phenolic hydroxyl groups in purple sweet potato pigment, which makes it highly hydrophilic. Therefore, the current research on the physiological activity and product development of purple sweet potato pigment is mainly concentrated in the aqueous solution system, and the research on purple sweet potato pigment in the oil system Very little, th...

Claims

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Application Information

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IPC IPC(8): A23L5/43C09B61/00
CPCC09B61/00A23V2002/00
Inventor 吕晓玲马雪松张泽生孙平
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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