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Preparation method of acidolysis acetylated composite modified starch

A compound modified starch and acetylation technology, which is applied in the food field and can solve the problems of high viscosity of natural starch and limited wide application

Inactive Publication Date: 2011-07-06
HARBIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Natural starch has the characteristics of water insolubility and high viscosity, which limits its wide application in industry

Method used

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  • Preparation method of acidolysis acetylated composite modified starch
  • Preparation method of acidolysis acetylated composite modified starch
  • Preparation method of acidolysis acetylated composite modified starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: the preparation method of a kind of acid hydrolysis acetylated compound modified starch of the present invention, the steps are as follows:

[0013] Step 1: Accurately weigh 20g of rice starch, add 30mL of distilled water to prepare a 40% starch milk solution, pour it into an Erlenmeyer flask, then add 45mL of 1% hydrochloric acid, stir and mix evenly, put it in a water bath constant temperature oscillator for 35 React at ℃ for 5.5 hours. After acidolysis, add 3% sodium hydroxide solution, adjust the pH of the starch milk solution to neutral, filter and wash with suction, put it in a constant temperature drying oven at 40 ℃ and dry it, and then crush it. Obtain acid hydrolyzed rice starch;

[0014] Step 2: Accurately weigh 20g of acid-thinned rice starch, add 30mL of distilled water to make a 40% starch milk solution, pour it into a conical flask, adjust the pH value to 8.5 with 3% sodium hydroxide solution, add dry starch Based on 10% acetic anhydride, t...

Embodiment 2

[0016] Example 2: A method for preparing acidolysis acetylated composite modified starch of the present invention, the choice of starch raw material: rice starch; the choice of acid and alkali: hydrochloric acid, sodium hydroxide; the choice of acetylation reagent: acetic anhydride. Preparation process of acid hydrolyzed acetylated composite modified starch:

[0017] ① Accurately weigh 20g of rice starch, add 30mL of distilled water to make a 40% starch milk solution, pour it into a conical flask, then add 45mL of 1% hydrochloric acid, stir and mix well, put it in a water bath constant temperature oscillator at 35°C for reaction After 5.5 hours of acid hydrolysis, add 3% sodium hydroxide solution, adjust the pH of the starch milk solution to neutral, suction filter, wash, put it in a constant temperature drying oven at 40°C, and dry it at 40°C, then pulverize it to obtain acid Dissolve rice starch.

[0018] ② Accurately weigh 20g of acid-thinned rice starch, add 30mL of disti...

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Abstract

The invention relates to a preparation method of acidolysis acetylated composite modified starch, which comprises the following steps: accurately weighing 20g of rice starch, adding 30 ml of distilled water to prepare a 40% starch milk solution, carrying out acidolysis, adding a 3% sodium hydroxide solution, carrying out vacuum filtration, washing, drying in a constant-temperature drying box at 40 DEG C, and pulverizing to obtain the rice starch subjected to acidolysis; and accurately weighing 20g of the rice starch subjected to acidolysis, adding 30 ml of distilled water to prepare a 40% starch milk solution, adding acetic anhydride which accounts for 10% of the dry basis of the starch, regulating the pH value to neutral by using a 1% hydrochloric acid solution, carrying out vacuum filtration, washing, drying in a constant-temperature drying box at 40 DEG C, and pulverizing to obtain the acidolysis acetylated composite modified starch product. The delivery time of the acidolysis acetylated composite modified starch prepared by the method is 32 seconds, and the acetyl content is 1.95%. After the starch is subjected to composite modification treatment, the viscosity of the starch is reduced, and the freeze-thaw stability, the light transmittance of the paste and the tensile strength of the film are enhanced.

Description

(1) Technical field [0001] The invention relates to food technology, in particular to a preparation method of acid-hydrolyzed acetylated rice compound modified starch. (2) Background technology [0002] Rice starch and its derivatives are restricted by many aspects such as raw materials, cost and people's consumption level. They started late and developed slowly. The proportion in the starch and its derivatives industry is very small. However, in recent years, with the national economy With the continuous development of people's living standards and the unique functions of rice starch, the market demand for rice starch and its derivatives has also increased. There are more and more research departments and production of rice starch and its derivatives. . Due to the fine grains of rice starch, stable gelatinization and thawing properties, rice starch and its derivatives not only have the common functions of other starches and their derivatives, but also have some other starc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/04C08B30/12
Inventor 徐忠王铎
Owner HARBIN UNIV OF COMMERCE