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High-liquidity starch and preparation method and application thereof

A high-fluidity, starch-based technology, applied in the field of high-fluidity starch and its preparation, can solve problems affecting the coating effect, achieve low production costs, shorten reaction time, and avoid gelatinization

Active Publication Date: 2012-10-10
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese invention patent ZL 200710304696.7 discloses a starch with high fluidity and strong hydrophobicity and a preparation method thereof. A layer of hydrophobic film is coated on the surface of starch granules to obtain hydrophobic starch; at the same time, a layer of fluidity improving agent is coated on the surface of hydrophobic starch granules with silicon dioxide and aluminum oxide to make hydrophobic starch have good fluidity , but the main principle of preparing fluid starch by this method is to physically coat the starch granules. If the mixing is uneven, it will affect the coating effect and physical and chemical indicators such as the angle of repose.

Method used

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  • High-liquidity starch and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Use 75kg of water to prepare 25kg of dry base common corn starch into starch milk with a concentration of 25% by mass, add sodium sulfate equivalent to 3% (0.75kg) of starch dry base by mass, and pump the starch milk into the pipeline , circulating between the pipeline and the reaction tank, the pipeline is equipped with a clamp-type ultrasonic generator (manufactured by Guangzhou Xindongli Ultrasonic Electronic Equipment Co., Ltd., NPFS type), at an ultrasonic frequency of 15KHz, the ultrasonic intensity is 0.01W / cm 3 Under the effect on the subsequent reaction process of starch, the temperature of the starch slurry is controlled at 40°C by the jacketed water bath circulation in the reaction tank, and the pH value is adjusted to 9.0 with a 3% sodium hydroxide solution by mass percentage, and the pH value is adjusted to 9.0 at a rate of 10 ml / min. Slowly add chloroacetic acid equivalent to 0.5% (0.125kg) of starch on a dry basis for reaction, and keep the pH of the s...

Embodiment 2

[0044](1) Use 70kg of water to prepare 30kg of dry base tapioca starch into starch milk with a concentration of 30% by mass, add sodium sulfate equivalent to 5% (1.5kg) of starch dry base by mass, and pump the starch milk into the pipeline, Circulating between the pipeline and the reaction tank, the pipeline is equipped with a clamp-type ultrasonic generator (manufactured by Guangzhou Xindongli Ultrasonic Electronic Equipment Co., Ltd., NPFS type), at an ultrasonic frequency of 20KHz, the ultrasonic intensity is 0.05W / cm 3 Under the action of the subsequent reaction process of the starch, the temperature of the starch slurry is controlled to be 45°C through the jacketed water bath circulation in the reaction tank, and the pH value is adjusted to 9.5 with a 3% sodium hydroxide solution by mass percentage, and the pH value is adjusted to 9.5 at a rate of 10 ml / min. Slowly add chloroacetic acid (0.24kg) equivalent to 0.8% dry basis of starch for reaction, and keep the pH of starch...

Embodiment 3

[0049] (1) Use 65kg of water to prepare 35kg of dry wheat starch into starch milk with a concentration of 35% by mass, add sodium sulfate (3.5kg) equivalent to 10% by mass of starch dry basis, and pump the starch milk into the pipeline. Circulating between the pipeline and the reaction tank, the pipeline is equipped with a clamp-type ultrasonic generator (manufactured by Guangzhou Xindongli Ultrasonic Electronic Equipment Co., Ltd., NPFS type), at an ultrasonic frequency of 25KHz, the ultrasonic intensity is 0.1W / cm 3 Under the action of the subsequent reaction process of the starch, the temperature of the starch slurry is controlled at 50°C by the jacketed water bath circulation in the reaction tank, and the pH value is adjusted to 10.0 with a 3% sodium hydroxide solution by mass percentage, and the pH value is adjusted to 10.0 at a rate of 10 ml / min. Slowly add chloroacetic acid (0.35kg) which is equivalent to 1% of the dry weight of starch to react, and keep the pH of the st...

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Abstract

The invention discloses high-liquidity starch and a preparation method and the application thereof. The preparation process is simple, reaction is uniform, production cost is low, reaction time is short, expansion of starch particles under the alkaline reaction condition is restrained by sodium sulfate to avoid starch gelatinization and enable starch chemical modification to be centralized on the particle surfaces; introducing an ultrasonic field into the reaction process can improve reaction efficiency, reduce usage of chemical agents, shorten reaction time and reduce cost; electronegative substitute groups are crosslinked by metallic ions of different valences, a great amount of hydroxyls on the starch particle surfaces are shielded, and accordingly angle of repose of starch can be evidently decreased, and liquidity is improved. High-fluidity starch with the angle of repose ranging from 2 degrees to 5 degrees is obtained and has wide application values in industries of foods, daily chemicals, printing, agriculture, petroleum and the like.

Description

technical field [0001] The invention belongs to the field of starch modification and its deep processing, and in particular relates to a high-fluidity starch and its preparation method and application. Background technique [0002] Starch is a natural renewable resource with the characteristics of biodegradability, no environmental pollution, and low price. Natural starch and its modified products are widely used in food, chemical, pharmaceutical and other fields. Starch granules contain a large number of hydroxyl groups, which are highly hydrophilic and poor in fluidity. Introducing hydrophobic groups into starch molecules and shielding hydrophilic hydroxyl groups in an appropriate way can significantly improve the fluidity of starch, and the products are widely used in papermaking, food, printing, cosmetics, oil exploration and other fields. [0003] Native starch cannot flow freely in a dry state, and starch granules tend to coagulate and clump together. By chemically m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/00C08B31/04C08J3/28C08J3/24
Inventor 黄强张孜陈楚露周芹帆罗明昌陈沛华
Owner SOUTH CHINA UNIV OF TECH
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