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Oxidized glutinous rice starch as well as preparation method and application thereof

A technology of glutinous rice starch and starch milk is applied in the field of modified starch to achieve the effects of improved reactivity, high chemical reactivity and broad development prospects

Inactive Publication Date: 2014-06-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the special chemical structure of glutinous rice starch, it is the most representative, but there are few studies on its denaturation at home and abroad. Therefore, in order to improve its application performance and broaden its application range, it is necessary to conduct research on the modification of glutinous rice starch.
[0007] At present, the common raw materials for the production and preparation of oxidized starch include corn starch, tapioca starch, wheat starch, potato starch and waxy corn starch, etc., and the preparation of oxidized starch with glutinous rice starch has not been reported.

Method used

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  • Oxidized glutinous rice starch as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of oxidized glutinous rice starch, its preparation method is as follows:

[0040] (1) Mechanical activation: Activate the glutinous rice starch for 50 hours with a ball mill at room temperature under the condition that the revolution speed of the ball mill is 150r / min and the rotation speed is 300r / min; the inner diameter of the ball mill is 100mm, and the volume is 500ml; 50mm, the material of the grinding ball is agate;

[0041] (2) Adjust milk: Accurately weigh 30g of activated glutinous rice starch, and use deionized water to prepare starch milk with a mass fraction of 35%;

[0042] (3) Catalysis: Add 6ml of cobalt chloride solution with a mass fraction of 2% to the starch milk while stirring, and adjust the pH of the starch milk to 8 with a 3% mass fraction of sodium hydroxide solution;

[0043] (4) Oxidation: Slowly add 1ml of hydrogen peroxide with a mass fraction of 30% to the starch milk catalyzed in step (3), and react at a constant temperature of 40°C...

Embodiment 2

[0049] A kind of oxidized glutinous rice starch, its preparation method is as follows:

[0050] (1) Mechanical activation: use a ball mill to activate the glutinous rice starch for 55 hours under the conditions of ball mill revolution speed 150r / min and rotation speed 300r / min;

[0051] (2) Adjust milk: Accurately weigh 30g of activated glutinous rice starch, and use deionized water to prepare starch milk with a mass fraction of 35%;

[0052] (3) Catalysis: Add 9ml of cobalt chloride solution with a mass fraction of 3% to the starch milk while stirring, and adjust the pH of the starch milk to 8 with a 5% mass fraction of sodium hydroxide solution;

[0053] (4) Oxidation: Slowly add 1.2ml of hydrogen peroxide with a mass fraction of 40% to the starch milk catalyzed in step (3), and react at a constant temperature of 40°C for 1.5h to obtain the oxidized starch emulsion;

[0054] (5) Termination reaction: Use 0.1mol / L hydrochloric acid to neutralize the pH value of the oxidized ...

Embodiment 3

[0058] A kind of oxidized glutinous rice starch, its preparation method is as follows:

[0059] (1) Mechanical activation: use a ball mill to activate the glutinous rice starch for 60 hours under the conditions of ball mill revolution speed 150r / min and rotation speed 300r / min;

[0060] (2) Adjust milk: Accurately weigh 30g of activated glutinous rice starch, and use deionized water to prepare starch milk with a mass fraction of 35%;

[0061] (3) Catalysis: Add 9ml of ferrous sulfate solution with a mass fraction of 4% to the starch milk while stirring, and adjust the pH of the starch milk to 10 with a potassium hydroxide solution of 3% mass fraction;

[0062] (4) Oxidation: Slowly add 1.5ml of hydrogen peroxide with a mass fraction of 30% to the starch milk catalyzed in step (3), and react at a constant temperature of 45°C for 2 hours to obtain the oxidized starch emulsion;

[0063] (5) Termination reaction: Use 0.1mol / L hydrochloric acid to neutralize the pH value of the ox...

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Abstract

The invention belongs to the field of modified starch, and particularly discloses oxidized glutinous rice starch as well as a preparation method and an application thereof. The preparation method disclosed by the invention comprises the steps of mechanical activation, milk adjustment, catalyzing, oxidation, termination reaction and product purification. The oxidized glutinous rice starch obtained by using the method can be applied to surface sizing agents, coating adhesive, wet end additives, corrugated board adhesives and the like in papermaking industries. The preparation method disclosed by the invention is reasonable in process, short in preparation cycle and high in product yield; and compared with native starch, the prepared oxidized glutinous rice starch has the advantages of light color, low gelatinization temperature, good mobility, low paste viscosity, high stability, high transparency, good film-forming property, strong adhesive force and the like.

Description

technical field [0001] The invention belongs to the field of modified starch, and in particular relates to an oxidized glutinous rice starch and a preparation method and application thereof. Background technique [0002] Due to the limited variety of natural starch, and the disadvantages of insolubility in cold water, poor thermal stability of paste, low shear resistance, easy dehydration after cooling, easy aging, poor film forming and lack of water resistance, new processes are widely used in modern industry. , new equipment, new technology, etc. have a limited range of applications and cannot meet the needs of the growing modern technology and equipment. Therefore, starch needs to be denatured. Starch denaturation is the use of physical, chemical or biological means to change the properties of native starch, through molecular cutting, rearrangement, oxidation or the introduction of substituents in starch molecules to obtain starch derivatives with changed properties, that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/18
Inventor 杨仁党刘进王斌杨飞
Owner SOUTH CHINA UNIV OF TECH
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