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
CN111154818AActive Publication Date: 2020-05-15JIANGNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGNAN UNIV
Publication Date
2020-05-15

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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%.
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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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