Granular cold water soluble porous starch

A porous starch and granular technology, which is applied in the field of modified starch, can solve the problems that the particle surface does not have a porous structure, does not have the excellent characteristics of porous starch, and the variability of processing conditions is small, and achieves good adsorption and embedding performance and mild preparation conditions. , the effect of improving solubility

Inactive Publication Date: 2010-09-08
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pregelatinized starch completely destroys the granule structure of the original starch, and has disadvantages such as poor gloss and little variability to processing conditions. The state and properties of the paste after rehydration are quite different from those made from the original starch; and Although granular cold-water soluble starch maintains the granule structure of the original starch, the paste after rehydration is basically the same as the paste made from the original starch, but the surface of the granules does not have a porous structure, that is, it does not have the excellent characteristics of porous starch.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Mix 100 g (moisture content: 13%) of corn porous starch with a porosity of 70% obtained by hydrolysis with compound amylase and 600 mL of ethanol solution with a concentration of 80% by volume to form a slurry, and then mix it at a temperature of 45° C. at a constant speed. Add 24 g of sodium hydroxide powder in batches under stirring conditions (pay attention to avoid excessive local alkalinity), raise the temperature to 55°C after addition, and stir at a constant temperature for 20 minutes; For precipitation, add 300mL of ethanol solution with a concentration of 80% by volume, let stand at room temperature for 3 hours again, separate the precipitate, then add 200mL of ethanol solution with a concentration of 80% by volume, and add 3mol / L hydrochloric acid ethanol solution After neutralization, filter, the filter cake is washed twice with 85% ethanol solution by volume, dried, pulverized and sieved to obtain granular cold water soluble porous starch.

[0016] The starc...

Embodiment 2

[0018] 500g (moisture content is 13%) of cassava porous starch with a porosity of 85% obtained by hydrolysis with compound amylase and 4000mL of ethanol solution with a concentration of 90% by volume are mixed to form a slurry. Add 240mL of sodium hydroxide solution with a concentration of 500g / L (using ethanol solution with a concentration of 90% by volume as the solvent) in batches under stirring conditions (pay attention to avoid excessive local alkalinity), and then stir and react at a constant temperature of 35°C. 30 minutes; after the reaction is completed, centrifuge the reaction solution at room temperature at a speed of 3000r / min to separate the precipitate, add 3000mL of ethanol solution with a volume percentage concentration of 85%, centrifuge again, separate the precipitate, and then add % ethanol solution 2000mL, neutralized to neutral with hydrochloric acid ethanol solution with a concentration of 3mol / L, filtered, and the filter cake was washed twice with absolut...

Embodiment 3

[0021] Mix 200 g (moisture content: 12%) of sweet potato porous starch with a porosity of 75% (moisture content: 12%) and 2000 mL of ethanol solution with a concentration of 70% by volume to form a slurry Then add 200mL of sodium hydroxide solution with a concentration of 600g / L (using ethanol solution with a concentration of 70% by volume as a solvent) in portions at a temperature of 45°C and stirring at a constant speed (pay attention to avoid excessive local alkalinity) After the addition, the temperature was raised to 60°C, and the reaction was stirred at a constant temperature for 20 minutes; after the reaction was completed, the reaction solution was centrifuged at room temperature at a speed of 3000r / min to separate the precipitate, and 1500mL of ethanol solution with a volume percentage concentration of 80% was added, and centrifuged again. Separate the precipitate, then add 1000mL of ethanol solution with a concentration of 80% by volume, neutralize it with ethanol sol...

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Abstract

The invention discloses a granular cold water soluble porous starch which is prepared by a method comprising the steps of: mixing porous starch and alcohol solution to form slurry, adding sodium hydroxide under the condition of stirring, and stirring for reaction at the constant temperature; after the reaction, leading reaction liquid to stand still or centrifuge, separating for precipitation, and washing by the alcohol solution; then, adding the alcohol solution, and neutralizing mixed solution to be neutral by using hydrochloric acid alcohol solution; filtering, washing a filter cake by the alcohol solution, drying, crushing and screening; and finally, obtaining the granular cold water soluble porous starch. The granular cold water soluble porous starch not only maintains the granular structure of the original starch and the porous structure of the surface of the porous starch, and has larger specific surface area and good absorption embedding performance, but also can be more rapidly dispersed and dissolved into the cold water, and has the dissolution rate reaching up to more than 70%. Furthermore, the preparation method is simple, and industrialized production can be easily realized.

Description

technical field [0001] The invention relates to a modified starch, in particular to a granular cold water soluble porous starch. Background technique [0002] Starch is a renewable raw material that is cheap, readily available and widely used. With the advancement of science and technology, the defects of structure and performance of native starch greatly limit its application range, and cannot meet the requirements of new industrial technologies. Modified starch has been paid more and more attention by people. [0003] Porous starch (microporous starch) is a porous honeycomb starch formed by partially hydrolyzing native starch with amylase or acid at a temperature lower than the starch gelatinization temperature. Compared with native starch, porous starch has the advantages of large specific surface area and specific volume, strong adsorption and embedding performance, low production cost, safety and non-toxicity, and can be used as an adsorption carrier and Embedding age...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L3/04
Inventor 刘雄阚建全
Owner SOUTHWEST UNIVERSITY
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