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Method for producing corn porous starch by using low temperature freeze-thawing technology

A technology for porous starch and corn starch, applied in the field of starch deep processing, can solve the problems affecting the reactivity, adsorption and embedding properties of corn starch, high cost of enzymatic chemical reagents, complex compound modification process, etc. Low cost and high freeze-thaw stability

Inactive Publication Date: 2016-11-09
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively small natural micropores, amorphous channels and cavity structures of corn starch granules, it is not conducive to the surface contact reaction of starch granules and the entry of functional molecules into the interior of the granules. These structural defects also seriously affect the reactivity and adsorption of corn starch. and embedding, which limits its potential application value in the fields of food and pharmaceutical industries
At present, the preparation methods of corn starch porous starch mainly include chemical, physical, biological and compound denaturation methods, etc., but chemical denaturation needs to change the chemical structure of starch or introduce new groups or chemical reagents. Consider and evaluate its safety issues; the cost of enzyme chemical reagents required for biological denaturation is relatively high; the complex denaturation process is relatively complicated, which is not conducive to production

Method used

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  • Method for producing corn porous starch by using low temperature freeze-thawing technology
  • Method for producing corn porous starch by using low temperature freeze-thawing technology
  • Method for producing corn porous starch by using low temperature freeze-thawing technology

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Experimental program
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Effect test

Embodiment 1

[0029] Take cornstarch, place in container, be 1:3 according to starch: water ratio, add water and soak for 6 hours;

[0030] The cornstarch obtained by soaking above was frozen at a temperature of -20°C for 12 hours. After freezing, the frozen cornstarch was thawed at a temperature of 25°C for 4 hours, and repeated freezing and thawing for 0, 5, 10, 20 times;

[0031] The cornstarch obtained after the above freeze-thawing was placed at a temperature of 40° C. for drying, and the drying time was 48 hours;

[0032] Pulverizing the dried cornstarch;

[0033] Pass the crushed corn starch through a 100-mesh sieve to obtain corn porous starch. The obtained corn porous starch has a porosity greater than 50% and a moisture content of 10% to 14%.

[0034] figure 2 Electron microscope of the corn porous starch obtained by freezing and thawing at a freezing temperature of -20°C and a thawing temperature of 25°C (a: 0 times, b: 5 times, c: 10 times, d: 20 times) scan diagram.

Embodiment 2

[0036] Take cornstarch, place in container, be 1:3 according to starch: water ratio, add water and soak for 6 hours;

[0037] The cornstarch obtained by soaking above was frozen at a temperature of -196°C for 12 hours. After freezing, the frozen cornstarch was thawed at a temperature of 25°C for 4 hours, and repeated freezing and thawing 0, 5, 10, 20 times;

[0038] The cornstarch obtained after the above freeze-thawing was placed at a temperature of 40° C. for drying, and the drying time was 48 hours;

[0039] Pulverizing the dried cornstarch;

[0040] Pass the crushed corn starch through a 100-mesh sieve to obtain corn porous starch. The obtained corn porous starch has a porosity greater than 50% and a moisture content of 10% to 14%.

[0041] image 3 Electron microscope of the corn porous starch obtained by freezing and thawing at a freezing temperature of -196°C and a thawing temperature of 25°C (a: 0 times, b: 5 times, c: 10 times, d: 20 times) scan diagram.

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Abstract

A method for producing corn porous starch by using a low temperature freeze-thawing technology comprises the following steps: 1, immersing corn starch; 2, freeze-thawing: freezing the immersed corn starch at -10 ~ -196 DEG C for 0.5-12 h, unfreezing the frozen corn starch at 20-50 DEG C for 3-8 h, and repeatedly carrying out freezing and unfreezing treatment 1-50 times. The method has the advantages of simplicity in operation, high production efficiency, clean production technology, no pollution to environment, realization of large-scale continuous production, and low production cost due to adoption of reagents and materials having common specifications; and the corn porous starch produced in the invention has the advantages of high freeze-thawing stability, strong reaction activity, good adsorptivity and good embedding property.

Description

technical field [0001] The invention belongs to the technical field of starch deep processing, and in particular relates to a method for preparing corn porous starch by low-temperature freeze-thaw technology. Background technique [0002] Corn starch is an important raw material widely used in medicine and food industry and other fields. At present, my country's corn starch production can reach about 18 million tons, and corn starch resources are very rich. Due to the relatively small natural micropores, amorphous channels and cavity structures of corn starch granules, it is not conducive to the surface contact reaction of starch granules and the entry of functional molecules into the interior of the granules. These structural defects also seriously affect the reactivity and adsorption of corn starch. And embedding, which limits its potential application value in the fields of food and pharmaceutical industry. At present, the preparation methods of corn starch porous starc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L3/02
CPCC08J9/28C08J2303/02
Inventor 余世锋王存堂宫春宇王岩刘军徐婷婷焦岩高帅王文霞任健郑喜群
Owner QIQIHAR UNIVERSITY
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