Hydroxypropyl tapioca starch-zein compound and preparation method thereof

A technology of zein and hydroxypropyl cassava, which is applied in the field of grain processing to achieve the effects of convenient processing, industrial production and increased contact opportunities

Active Publication Date: 2018-06-19
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are few reports on the research on hydroxypropyl tapioca starch-zein complex at home

Method used

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  • Hydroxypropyl tapioca starch-zein compound and preparation method thereof
  • Hydroxypropyl tapioca starch-zein compound and preparation method thereof
  • Hydroxypropyl tapioca starch-zein compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A preparation method of hydroxypropyl tapioca-zein complex, comprising the following steps:

[0055] (1) Dissolving zein in 70% (v / v) ethanol solution to prepare zein solutions with mass concentrations of 5%, 10%, 15%, and 20% respectively;

[0056] (2) Add hydroxypropyl tapioca starch to the zein solution (the weight ratio of hydroxypropyl tapioca starch and zein is 2:1), adjust the pH to 9, and mix in a constant temperature water bath at 40°C for 1 hour, After mixing, slowly add into cold water at 0°C, the amount of cold water is 80 times the weight of zein, after stirring, vacuum filter, dry at 45°C, pass through 80-mesh sieve to obtain.

[0057] Using the same method, the tapioca starch-zein complex was prepared using unmodified tapioca starch as a control.

Embodiment 2

[0059] A preparation method of hydroxypropyl tapioca-zein complex, comprising the following steps:

[0060] (1) dissolving zein in 70% (v / v) ethanol solution to prepare a zein solution with a mass concentration of 5%;

[0061] (2) Add hydroxypropyl tapioca starch to the zein solution (the weight ratio of hydroxypropyl tapioca starch and zein is 2:1, 4:1, 6:1, 8:1 respectively), adjust pH to 9, mixed in a constant temperature water bath at 40°C for 1 hour, slowly added to cold water at 0°C after mixing, the amount of cold water was 80 times the weight of zein, after stirring, vacuum filtered, dried at 45°C, Pass through a 80-mesh sieve.

[0062] Using the same method, the tapioca starch-zein complex was prepared using unmodified tapioca starch as a control.

Embodiment 3

[0064] A preparation method of hydroxypropyl tapioca-zein complex, comprising the following steps:

[0065] (1) dissolving zein in 70% (v / v) ethanol solution to prepare a zein solution with a mass concentration of 10%;

[0066] (2) Add hydroxypropyl tapioca starch to the zein solution (the weight ratio of hydroxypropyl tapioca starch and zein is 2:1), adjust the pH to 9, and heat at 30°C, 40°C, and 50°C respectively , Mix in a constant temperature water bath at 60°C for 1 hour, slowly add to cold water at 0°C after mixing, the amount of cold water is 80 times the weight of zein, after stirring, vacuum filter, dry at 45°C, and pass through a 80-mesh sieve , that is.

[0067] Using the same method, the tapioca starch-zein complex was prepared using unmodified tapioca starch as a control.

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Abstract

The invention discloses a hydroxypropyl tapioca starch-zein compound and a preparation method of the hydroxypropyl tapioca starch-zein compound. The hydroxypropyl tapioca starch-zein compound is prepared by winding and wrapping zein on the surface of a hydroxypropyl tapioca starch. The characteristic that the zein can be dissolved in an ethanol solution of 60%-95% but cannot be dissolved in waterand absolute ethyl alcohol is used, the zein is firstly dissolved in the ethanol solution of 70%, then the hydroxypropyl tapioca starch is added into the completely dissolved zein solution and fully mixed, the mixture is added into cold water to reduce the concentration of ethanol, the zein is dissolved out from the ethanol solution and is self-assembled, the hydroxypropyl tapioca starch is adhered, wound and wrapped through the self-adhesion and the rearrangement and integration of the space structure in the self-assembly process, so that the hydroxypropyl tapioca starch-zein compound is formed. The particle morphology, the average grain diameter, the pasting property, the thermal property and the like of the compound are changed to a certain extent, unique processing and functional characteristics are given to the food system, and the product quality is improved.

Description

technical field [0001] The invention relates to a hydroxypropyl tapioca starch-zein compound and a preparation method thereof, belonging to the technical field of grain processing. Background technique [0002] Starch is a natural polymer compound with low price and abundant resources, which is widely used in various industries. When starch is used, it will be affected by factors such as high temperature, mechanical shear, low pH, salt and low temperature. Therefore, chemical, physical or enzymatic conversion methods are often used to modify starch to improve the applicability of starch processing and application. [0003] Hydroxypropyl starch is an important etherified modified starch, which is obtained by reacting starch and propylene oxide under alkaline conditions. The glue is stable and transparent, relatively stable to acid, alkali and electrolyte. It is a non-ionic starch derivative with hydrophilicity and good freeze-thaw stability. It is a safe modified starch reco...

Claims

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Application Information

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IPC IPC(8): C08L3/08C08L89/00A23L29/30
CPCA23L29/30C08L3/08C08L2201/08C08L89/00
Inventor 刘洁王香丽刘亚伟吕宁王亚丹王海洋李莉李颖颖
Owner HENAN UNIVERSITY OF TECHNOLOGY
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