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Method for preparing modified starch

A technology of modified starch and starch, applied in the field of starch processing, can solve the problems of poor freeze-thaw stability and poor film-forming properties, and achieve the effects of improving flow performance, improving freeze-thaw stability and improving film-forming properties

Inactive Publication Date: 2018-01-30
杨帮燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a preparation method of modified starch for the disadvantages of poor freeze-thaw stability and poor film-forming property of traditional modified starch

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0022] The preparation method of modified starch of the present invention comprises following preparation steps:

[0023] Put the starch and water into the container according to the mass ratio of 1:4~6, mix evenly, and place it at 60~65°C with 150r / min to stir and gelatinize for 50~60min, then add coke with 7~10% of the starch mass Mix sodium phosphate evenly, let it stand for 4-7 hours, cool to room temperature, freeze-dry the material in the container, and collect the dry matter; then put the dry matter and beeswax into a ball mill according to the mass ratio of 5-7:1, and then add Steel balls with a diameter of 40 mm that are 5 to 7 times the amount of the freeze-dried material are ball milled at 500 r / min for 40 to 50 minutes, and the ball milling mixture is collected. According to a mass ratio of 1:3, the ball milling mixture and absolute ethanol are stirred evenly, and put into steam explosion Steam explosion is carried out in the device, the set pressure is 3-5MPa, the...

example 1

[0025] The preparation method of modified starch of the present invention comprises following preparation steps:

[0026] Put starch and water in a container at a mass ratio of 1:4, mix evenly, and place at 60°C with 150r / min to stir and gelatinize for 50min, then add sodium pyrophosphate with 7% starch mass, mix evenly, and let stand for 4h , cooled to room temperature, freeze-dried the material in the container, and collected the dried material; then put the dried material and beeswax into a ball mill according to a mass ratio of 5:1, and then added 5 times the amount of freeze-dried material. Balls were ball-milled at 500r / min for 40min, and the ball-milling mixture was collected. The ball-milling mixture and anhydrous ethanol were stirred evenly at a mass ratio of 1:3, and placed in a steam explosion device for steam explosion. The set pressure was 3MPa and the temperature was 40°C. , the pressure maintenance time is 2min, and the explosives are collected; then, according ...

example 2

[0028] The preparation method of modified starch of the present invention comprises following preparation steps:

[0029] Put starch and water in a container with a mass ratio of 1:5, mix evenly, and place at 63°C with 150r / min to stir and gelatinize for 55min, then add sodium pyrophosphate with 8% starch mass, mix evenly, and let stand for 6h , cooled to room temperature, freeze-dried the material in the container, and collected the dried material; then put the dried material and beeswax into a ball mill at a mass ratio of 6:1, and then added 6 times the amount of freeze-dried material. Balls were ball-milled at 500r / min for 45min, and the ball-milling mixture was collected. According to the mass ratio of 1:3, the ball-milling mixture and absolute ethanol were stirred evenly, and put into a steam explosion device for steam explosion. The set pressure was 4MPa, and the temperature was 43°C. , the pressure maintenance time is 3min, and the explosives are collected; then, accord...

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Abstract

The invention discloses a method for preparing modified starch, and belongs to the field of starch processing. The method includes uniformly mixing starch and water with each other to obtain first mixtures and pasting the first mixtures; adding tetrasodium pyrophosphate into the first mixtures, uniformly mixing the tetrasodium pyrophosphate and the first mixtures with one another to obtain secondmixtures, allowing the second mixtures to stand still, cooling the second mixtures and carrying out freeze drying on the second mixtures to obtain dry substances; carrying out ball-milling on the drysubstances and beeswax, then uniformly stirring the dry substances, the beeswax and absolute ethyl alcohol to obtain third mixtures; placing the third mixtures in a steam explosion device and carryingout steam explosion on the third mixtures to obtain explosion substances; mixing the explosion substances and hydrogen peroxide with one another and carrying out oxidation treatment on the explosionsubstances and the hydrogen peroxide; adding ethylene glycol into the explosion substances and the hydrogen peroxide to obtain fourth mixtures, allowing the fourth mixtures to stand still and carryingout spray-drying on the fourth mixtures while the fourth mixtures are hot so as to obtain spray-drying substances; carrying out stirring reaction on the spray-drying substances, aluminum chloride andacetyl chloride to obtain reaction products; adding tyrosine into the reaction products, stirring the tyrosine and the reaction products to obtain fifth mixtures, cooling the fifth mixtures until thetemperatures of the fifth mixtures reach the room temperature and discharging discharged substances; carrying out freeze drying on the discharged substances, washing, drying, smashing and sieving thedischarged substances to obtain sieved particles so as to obtain the modified starch. The method has the advantage that the modified starch is good in freeze-thaw stability and excellent in film forming property.

Description

technical field [0001] The invention relates to a preparation method of modified starch, which belongs to the field of starch processing. Background technique [0002] On the basis of the inherent characteristics of natural starch, in order to improve the performance of starch and expand its application range, physical, chemical or enzymatic treatment is used to introduce new functional groups on starch molecules or change the size of starch molecules and the properties of starch granules. Thereby changing the natural characteristics of starch (such as: gelatinization temperature, thermal viscosity and its stability, freeze-thaw stability, gel force, film-forming property, transparency, etc.), making it more suitable for certain application requirements. This kind of starch that has undergone secondary processing and changed its properties is collectively referred to as modified starch. [0003] Physical denaturation refers to the use of physical methods such as fumigation,...

Claims

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Application Information

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IPC IPC(8): C08B31/04C08B31/18C08B30/12
Inventor 蒋福鑫方晓俊王磊
Owner 杨帮燕
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