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Preparation method of corn porous starch

A technology of porous starch and corn, which is applied in the preparation of porous corn starch and the field of porous starch prepared by compound enzyme-intermittent ultrasonic method, which can solve the problems of long reaction time, slow reaction rate and high production cost, and achieve the reduction of enzyme consumption, Effect of avoidance of residual, high price advantage

Inactive Publication Date: 2018-05-11
ZHEJIANG SHUREN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the reaction rate is slow and the reaction time is long. In addition, the price of the enzyme is high, and its production cost is also high

Method used

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  • Preparation method of corn porous starch
  • Preparation method of corn porous starch
  • Preparation method of corn porous starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] refer to figure 1 , the preparation method of corn porous starch, comprises the following steps:

[0040] (1) Prepare starch milk A: disperse 20 g of corn starch raw materials into citric acid and disodium hydrogen phosphate pre-buffer solution of pH 5.0, and prepare starch milk A with a mass concentration of 50%;

[0041] (2) Preheat treatment: move the starch milk A into a closed reactor with a stirrer and a condenser collection device, stir and heat to 50°C, keep for 15min, and the starch granules are heated to expand to obtain the starch milk B; ( 3) Enzymolysis treatment: add 0.4% by weight of glucoamylase compound enzyme (glucoamylase:α-amylase 9:1) to starch milk B, and perform enzymatic hydrolysis for 10 hours; among them, perform intermittent ultrasonication for 30 minutes during the enzymatic hydrolysis process Treatment, once every 30 minutes;

[0042] (4) Enzymolysis termination treatment: Immediately after enzymolysis, 4 mL of 4% NaOH solution was added t...

Embodiment 2

[0053] refer to figure 1 , the preparation method of corn porous starch, comprises the following steps:

[0054] (1) Preparation of starch milk A: disperse 20 g of corn starch raw materials into citric acid and disodium hydrogen phosphate pre-buffer solution of pH 3.5, and prepare starch milk A with a mass concentration of 30%;

[0055] (2) Preheat treatment: move starch milk A into a closed reactor with a stirrer and a condenser collection device, stir and heat to 45°C, keep for 20min, and the starch granules are heated to expand to obtain starch milk B; ( 3) Enzymolysis treatment: add 0.1% by weight of glucoamylase compound enzyme (glucoamylase: α-amylase 1:9) to starch milk B, and perform enzymatic hydrolysis for 5 hours; during the enzymatic hydrolysis process, perform intermittent ultrasonication for 20 minutes Treatment, once every 30 minutes;

[0056] (4) Enzymolysis termination treatment: Immediately after enzymolysis, 3.5 mL of 2% NaOH solution was added to terminat...

Embodiment 3

[0060] refer to figure 1 , the preparation method of corn porous starch, comprises the following steps:

[0061] (1) Preparation of starch milk A: disperse 20 g of corn starch raw materials into citric acid and disodium hydrogen phosphate pre-buffer solution of pH 5.5, and prepare starch milk A with a mass concentration of 40%;

[0062] (2) Preheat treatment: move starch milk A into a closed reactor with a stirrer and a condenser collection device, stir and heat to 55°C, keep for 5min, and the starch granules are heated to expand to obtain starch milk B; ( 3) Enzymolysis treatment: add 0.5% by weight of glucoamylase compound enzyme (glucoamylase:α-amylase 5:1) to starch milk B, and perform enzymatic hydrolysis for 8 hours; among them, perform intermittent ultrasonication for 25 minutes during the enzymatic hydrolysis process Treatment, once every 30 minutes;

[0063] (4) Enzymolysis termination treatment: Immediately after enzymolysis, 5 mL of 5% NaOH solution was added to t...

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Abstract

The invention discloses a preparation method of corn porous starch. The preparation method comprises adding a disodium hydrogen phosphate-citric acid buffer solution into raw corn starch, carrying outmixing to obtain starch milk, preheating the starch milk, adding glucoamylase and alpha-amylase into the starch milk, carrying out enzymatic hydrolysis along with intermittent ultrasonic treatment, then adding a NaOH solution to stop the reaction, washing the enzymatic hydrolysis product through distilled water until pH of 7, carrying out suction filtration, putting the filtrate into an oven, carrying out natural drying and carrying out crushing to obtain corn porous starch. The corn porous starch contains uniform pores, has moderate pore depth, integrated particles and strong adsorptivity and can be widely used in the fields of foods and medicines.

Description

technical field [0001] The invention belongs to the technical field of food additives and preparation methods thereof, and relates to a preparation method of corn porous starch, in particular to a process for preparing porous starch by a composite enzyme-intermittent ultrasonic method. Background technique [0002] my country is a large country of corn, the output is second only to rice and wheat, the annual output and import and export volume are large, the industry develops rapidly, and the total economy of scale is large. The multi-level deep processing of corn has become the main development direction of the corn industry. Porous starch is a kind of hollow modified starch formed by physical, chemical and biological treatment of starch. Due to its high specific surface area, pore volume, low density and degradability, its huge application potential has attracted extensive attention and research. The modified porous starch granules have no significant change in their basic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/04C12P19/14
CPCC12P19/04C12P19/14
Inventor 蒋新龙蒋益花朱志友金文浩沈佳琦王纯洁
Owner ZHEJIANG SHUREN UNIV
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