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Method of preparing amorphous starch granule without crosslinking chemical bond by aqueous phase method

A technology of starch granules and chemical bonds, which is applied in the non-solvent aqueous phase method to prepare amorphous starch granules without cross-linking chemical bonds, which can solve the problems of starch granules losing their gelatinization properties, affecting their workability, etc., and achieving adsorption The effect of good performance, cost reduction and safety improvement

Inactive Publication Date: 2007-08-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this kind of highly cross-linked starch granules is also amorphous and granular at the same time, due to the existence of a large number of cross-linked chemical bonds, the starch granules lose the original most important gelatinization characteristics, and at the same time greatly reduce the gelatinization properties. Processability, therefore, applications in various fields are also greatly affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Configure starch milk: disperse potato starch into water, and modulate into uniform starch milk with a mass concentration of 20%;

[0021] (2) Amorphization treatment: heat the starch milk to 70°C and keep it for 0.1 hour, the starch granules will expand and transform into an amorphous state when heated;

[0022] (3) Post-treatment: The amorphous starch granules of the present invention are obtained by drying, pulverizing and sieving the amorphized starch.

[0023] (4) Carboxymethyl chemical modification is carried out by using the amorphous potato starch granules, the chemical reactivity thereof is increased by 9%-10%, and the gelatinizable property is maintained.

Embodiment 2

[0025] (1) Configure starch milk: disperse potato starch in the aqueous solution, and prepare uniform starch milk with a mass concentration of 20%;

[0026] (2) Amorphization treatment: increase the pH to 11 with a sodium hydroxide solution with a concentration of 1% in the starch milk, and keep it for 0.5 hours, and the starch granules will expand and transform into an amorphous state when heated;

[0027] (3) Post-treatment: neutralize, dry, pulverize and sieve the amorphized starch to obtain the amorphous starch granules of the present invention.

[0028] (4) Using the amorphous potato starch granules to carry out cationic chemical modification, the chemical reactivity thereof is increased by 9%-13%, and the gelatinizable property is maintained.

Embodiment 3

[0030] (1) configure starch milk: disperse tapioca starch in 1% sodium chloride saline solution, and modulate into the uniform starch milk that mass concentration is 25%;

[0031] (2) Amorphization treatment: heat the starch milk to 75°C and keep it for 0.5 hours, the starch granules will swell and transform into an amorphous state when heated;

[0032] (3) Post-treatment: The amorphous starch granules of the present invention are obtained by drying, pulverizing and sieving the amorphized starch.

[0033] (4) By using the amorphous tapioca starch granules for hydroxypropyl chemical modification, the chemical reactivity is increased by 30%-70%, and the gelatinizable property is maintained.

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Abstract

The invention discloses a making method of non-crystal starch particle without non-organic solvent water phase, which comprises the following steps: dispersing starch in the water or salt solution; allocating even starch emulsion; heating; or adding alkaline to improve pH value; proceeding non-crystal disposal; drying; grinding; sieving; placing obtaining the product with higher chemical and biological reacting activity and better penetrability and manufacturing property.

Description

technical field [0001] The invention relates to a method for producing amorphous starch, in particular to a method for preparing amorphous starch granules without cross-linking chemical bonds by a non-solvent aqueous phase method. Background technique [0002] Starch is the final product of photosynthesis of green plants, one of the most abundant renewable resources, and a natural polymer compound that can be completely biodegraded in nature. Its renewability is the focus of people's attention, and it has also become one of the main raw materials of modern organic chemical industry and polymer chemical industry. However, due to the inherent properties of starch itself, its application is limited. Treating native starch to make a series of changes in its properties can broaden the application range of starch. Modified starch has the characteristics of easy biodegradation and good adaptability to the same environment, and has been widely used in many fields of national econo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B30/04C08B3/06
Inventor 张本山王斌
Owner SOUTH CHINA UNIV OF TECH
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