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Preparation method of high-performance modified starch

A modified starch and high-performance technology, applied in the field of modified starch, can solve the problems of high irradiation cost, unstable product quality, and large dispersion of radiation-modified viscosity, so as to save energy, reduce the total irradiation time, and The effect of time t reduction

Active Publication Date: 2018-01-12
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-performance modified starch in order to solve the problems of unstable product quality and high irradiation cost due to the high viscosity dispersion of starch radiation modification. A preparation method, which reduces the absorbed dose of the product and improves the quality of the product by drying the starch, combining oxygenation technology, and optimizing the irradiation process

Method used

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  • Preparation method of high-performance modified starch
  • Preparation method of high-performance modified starch
  • Preparation method of high-performance modified starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Take cornstarch with a moisture content of 12.3% and carry out microwave drying treatment, and stir at least 20 times at the same time, and the moisture content of each part is 8%; the dried starch is packed in a shaped sealed bag, each bag length × width × thickness = 40cm ×30cm×8cm, pre-place 2 dosimeters on the outside of the packaging bag; the predetermined absorbed dose of the product is 1kGy, and the total irradiation time is 3.125 hours; the above-mentioned starch bag is placed in a special irradiation box, and γ-rays are used for frontal irradiation Irradiation treatment with a dose rate of 0.2kGy / hour and an irradiation time of 2.5 hours; then the above-mentioned irradiated starch in a sealed bag was oxygenated, and the oxygen partial pressure was added to 0.1MPa; shaping to keep its cuboid surface flat; The aforesaid oxygenated and shaped sealed packaging bags were irradiated on the reverse side with the orientation and direction reversed, with a dose rate of 0...

Embodiment 2

[0057] Take cornstarch with a moisture content of 12.3% and carry out infrared drying treatment, and stir at least 20 times at the same time, and the moisture content of each part is 6.7%; the dried starch is packed in a shaped sealed bag, each bag length × width × thickness = 38cm ×28cm×7.5cm, 2 dosimeters are pre-placed on the outside of the packaging bag; the predetermined absorbed dose of the product is 3kGy; the above-mentioned starch bag is placed in a special irradiation box, and X-rays are used for frontal irradiation treatment, with a dose rate of 0.75 kGy / hour, irradiation time 2 hours; then carry out oxygenation to the above-mentioned irradiated starch in sealed bag, supplement oxygen partial pressure to 0.1MPa; Seal the packaging bag, reverse the direction and orientation, and perform reverse side irradiation treatment with a dose rate of 3 kGy / hour and an irradiation time of 0.5 hour. The total irradiation time was 2.5 hours. The modified starch after irradiation...

Embodiment 3

[0060] Take cornstarch with a moisture content of 12.3% to dry in the sun, and stir it no less than 20 times at the same time, and the moisture content of each part is 8.0%; the dried starch is packed in a shaped sealed bag, and the length of each bag × width × thickness = 40cm×30cm×5cm, place at least 3 dosimeters on the outside of the packaging bag in advance; the predetermined absorbed dose of the product is 6kGy; the above-mentioned starch bag is placed in a special irradiation box, and the front side is irradiated with electron beams, and the delivery time is 10 minutes; then carry out oxygenation to the above-mentioned irradiated starch in sealed bags, supplement oxygen partial pressure to 0.1MPa; , carry out the irradiation treatment on the reverse side, and the delivery time is 2.5 minutes. The modified starch after irradiation treatment is taken out and stored in the warehouse, protected from moisture.

[0061] Measurement results: the minimum product absorbed dose o...

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Abstract

The invention discloses a preparation method of high-performance modified starch. The method comprises the following steps: putting dry starch into a sealed packet, firstly performing positive surfaceirradiation treatment with low dosage rate on the sealed packet, oxygenating the interior of the sealed packet, shaping the oxygenated sealed packet, and finally performing negative surface irradiation treatment with high dosage rate on the sealed packet, so as to obtain the high-performance modified starch. The method has the advantages that comprehensive irradiation technologies, such as oxygenation, alternative irradiation with different dosage rates, packaging and shaping and overturning, are adopted, so that the irradiation dosage unevenness is smaller than 1.1, the viscosity volatilityof the starch subjected to irradiation modification is smaller than 10 percent, the irradiation efficiency is high, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of starch modification and its application, in particular to a method for preparing modified starch with moderate viscosity and excellent performance by using high-energy ray radiation technology and auxiliary means. Background technique [0002] The chemical composition of starch is heterogeneous, mainly composed of amylose, amylopectin, and mildly branched amylose. In addition, there are associative components such as protein, lipid, ash, and water. At the same time, the starch granules are of semi-crystalline structure. These complex structures of starch determine the complexity of radiation's effect on starch. The action of high-energy rays on starch is mainly carried out in two ways: one is that the rays directly act on starch molecules; the other is that they indirectly act on starch molecules through free radical reactions. As a result of the action, the structure of starch molecules is destroyed, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B30/12
Inventor 赵永富钟志君周培国蒋希芝汪敏
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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