Method for preparing straight-chain dextrins

A straight-chain dextrin and membrane separation technology, which is applied to medical preparations with non-active ingredients, medical preparations containing active ingredients, and pharmaceutical formulas, can solve the problems of low dextrin yield and wide molecular weight distribution, and achieve The effect of low production cost, less environmental pollution, and uniform molecular weight distribution

Active Publication Date: 2020-05-15
JIANGNAN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of low dextrin yield and wide molecular weight distribution obtained by enzymatic hydrolysis of starch, protect the amorphous region by complexing with emulsifiers, thereby increasing the dextrin yield, and obtain the degree of polymerization through membrane separation technology Uniform linear dextrin composition

Method used

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  • Method for preparing straight-chain dextrins
  • Method for preparing straight-chain dextrins
  • Method for preparing straight-chain dextrins

Examples

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Effect test

Embodiment 1

[0041] (1) Ultrasonic declustering: Prepare 5%-10% waxy cornstarch milk, stir it evenly, and then ultrasonically treat it. The processing time is 10min;

[0042] (2) Ultrasonic complexation: Add waxy corn starch quality 5% glyceryl monostearate to the starch milk after ultrasonic treatment, stir evenly, the ultrasonic working frequency is 20kHz, processing power is 500W, temperature 40 ℃, every The time of each action is 3s, the interval is 5s, and the total ultrasonic time is 20min;

[0043] (3) Composite enzymatic hydrolysis: adjust the pH of the starch-glycerol monostearate complex solution to 6.0 with phosphate buffer, heat in a water bath to 50°C, add medium-temperature α-amylase and pullulanase, pullulanase The addition amount is 30 ASPU / g dry starch, the addition amount of α-amylase is 30 ASPU / g dry starch, and the water bath is hydrolyzed at 50°C for 3-4 hours. Boiling water bath for 5 minutes to inactivate medium-temperature α-amylase and pullulanase to terminate th...

Embodiment 2

[0048] (1) Ultrasonic declustering: Prepare 5%-10% waxy cornstarch milk, stir it evenly, and then ultrasonically treat it. The processing time is 10min;

[0049](2) Ultrasonic complexation: add palmitic acid of waxy corn starch quality 3% in the starch milk after ultrasonic treatment, stir evenly, ultrasonic working frequency is 20kHz, processing power is 500W, temperature is 40 ℃, each action time is 3s, interval 5s, total ultrasound time 20min;

[0050] (3) Composite enzymatic hydrolysis: adjust the pH of the starch-palmitic acid complex solution to 6.0 with phosphate buffer, heat in a water bath to 50°C, add medium-temperature α-amylase and pullulanase, and the amount of pullulanase added is 40 ASPU / g dry starch, the amount of α-amylase added is 20ASPU / g dry starch, and hydrolyzed in a water bath at 50°C for 3-4h. Boiling water bath for 5 minutes to inactivate medium-temperature α-amylase and pullulanase to terminate the reaction, and centrifuge to obtain the supernatant...

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Abstract

The invention discloses a method for preparing straight-chain dextrins and belongs to the technical field of chemical modification of starch. According to the method, by using a declustering and complexing action of ultrasonic waves, starch chains can be declustered, and an amorphous region and an emulsifier can be complexed; then, alpha-amylase and pullulanase are subjected to compound enzymolysis, and a complex formed by the amorphous region and the emulsifier is resistant to enzymolysis, so that the amorphous region is protected from being destroyed; and finally, dextrins of different molecular weights are separated through a membrane separation method, so that straight-chain dextrin products with low polydispersity coefficient and narrow distribution of molecular weight are obtained. The efficiency of comprehensive utilization of starch is increased to 70% or more, and the rate of complexing reaches up to 65%.

Description

technical field [0001] The invention relates to a preparation method of linear dextrin, which belongs to the technical field of starch chemical modification. Background technique [0002] The molecular weight and distribution of linear dextrins are closely related to their properties and applications. At present, amylose dextrins are mainly prepared by hydrolysis using amylose as a substrate, enzymatic debranching using amylopectin as a substrate, and enzymatic polymerization using glucose as a substrate. The linear dextrins prepared by these three methods all have the problem of wide molecular weight distribution, which limits their application range. Therefore, restricting the degradation of starch, graded and obtained new linear dextrin products with uniform polymerization degree, and broadening its application range in chemical, pharmaceutical, food and other fields are important ways to add value to agricultural and sideline products such as starch. [0003] Starch co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/16C12P19/14C12P19/04A61K9/50A61K47/36A61K31/202A23L29/30
CPCC12P19/16C12P19/14C12P19/04A61K9/5036A61K31/202A23L29/35A23V2002/00A23V2250/5114
Inventor 田耀旗王馨甜王金鹏麻荣荣詹锦玲
Owner JIANGNAN UNIV
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