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Preparation method of acetate starch

A technology of acetate starch and starch, which is applied in the field of preparation of acetate starch, can solve the problems of poor freeze-thaw stability, poor film-forming property and transparency, and easy aging

Inactive Publication Date: 2018-07-17
JILIN COFCO BIOCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although natural starch has a wide range of uses, its inherent characteristics such as insolubility in cold water, instability of the paste under heat, acid, and shear, easy aging, poor film-forming properties and transparency, and poor freeze-thaw stability greatly limit it. its application

Method used

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  • Preparation method of acetate starch

Examples

Experimental program
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Effect test

Embodiment 1

[0031] like figure 1 As shown, the preparation method of starch acetate of the present invention comprises the following steps:

[0032] (1) get tapioca starch and add water to prepare the starch emulsion (w / w density is about 1.18) with a mass concentration of 40wt%, uniformly stir the starch for 10min to fully disperse the starch, obtain a uniform starch emulsion, and carry out with the sodium hydroxide solution of 3wt% Alkalization treatment, adjusting the pH of the emulsion to 8.0-8.5, and then standing for 10min;

[0033] (2) adding acetic anhydride dropwise to the starch emulsion after the alkalization treatment to carry out esterification (the addition amount of the acetic anhydride accounts for 7wt% of the starch emulsion amount), and using an atomizing nozzle to dropwise add 3wt% hydrogen The sodium oxide solution is controlled to stabilize the pH value of the reaction solution at 8.0-8.5, and the reaction temperature is controlled at 25 ° C to carry out the reaction...

Embodiment 2

[0041] like figure 1 As shown, the preparation method of starch acetate of the present invention comprises the following steps:

[0042] (1) get tapioca starch and add water to prepare the starch emulsion (w / w density is about 1.18) with a mass concentration of 40wt%, uniformly stir the starch for 10min to fully disperse the starch, obtain a uniform starch emulsion, and carry out with the sodium hydroxide solution of 3wt% Alkalization treatment, adjusting the pH of the emulsion to 8.0-8.5, and then standing for 10min;

[0043] (2) adding acetic anhydride dropwise to the starch emulsion after the alkalization treatment to carry out esterification (the addition amount of the acetic anhydride accounts for 7wt% of the starch emulsion amount), and using an atomizing nozzle to dropwise add 3wt% hydrogen The sodium oxide solution is controlled to stabilize the pH value of the reaction solution at 8.0-8.5, and the reaction temperature is controlled at 30 ° C to carry out the reaction...

Embodiment 3

[0047] like figure 1 As shown, the preparation method of starch acetate of the present invention comprises the following steps:

[0048] (1) get tapioca starch and add water to prepare the starch emulsion (w / w density is about 1.18) with a mass concentration of 40wt%, uniformly stir the starch for 10min to fully disperse the starch, obtain a uniform starch emulsion, and carry out with the sodium hydroxide solution of 3wt% Alkalization treatment, adjusting the pH of the emulsion to 8.0-8.5, and then standing for 10min;

[0049] (2) adding acetic anhydride dropwise to the starch emulsion after the alkalization treatment to carry out esterification (the addition amount of the acetic anhydride accounts for 7wt% of the starch emulsion amount), and using an atomizing nozzle to dropwise add 3wt% hydrogen The sodium oxide solution is controlled to stabilize the pH value of the reaction solution at 8.0-8.5, and the reaction temperature is controlled at 35 ° C to carry out the reaction...

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Abstract

The invention belongs to the technical field of preparation of modified starch and particularly relates to a preparation method of acetate starch. The preparation method of the acetate starch comprises the following steps: taking cassava starch as a raw material and acetic anhydride as an esterification reagent and preparing tapioca acetate starch with different acetyl contents and degrees of substitution through acetylation reaction; the acetyl contents and the degrees of substitution of the obtained acetate starch meet the requirements in the market-oriented application field.

Description

technical field [0001] The invention belongs to the technical field of modified starch preparation, and in particular relates to a preparation method of acetate starch. Background technique [0002] Starch is the main component of green plant fruits, seeds and tubers, and it is the main component of CO in the air. 2 and H 2 O is a storage polysaccharide synthesized by photosynthesis. As a renewable resource second only to cellulose, starch is the main carbohydrate in the human diet and the main source of energy for the human body. my country is a big agricultural country with abundant starch resources and complete varieties, mainly including cereal starch, potato starch, bean starch and other varieties of starch resources. At present, industrialized high-purity starch and its derivatives are widely used in different fields such as food, medicine, textile, papermaking, and chemical industry. Therefore, the deep processing of starch and its products has broad market prospe...

Claims

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Application Information

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IPC IPC(8): C08B31/04
CPCC08B31/04
Inventor 佟毅薛晓舟黄锦郑诗雨赵国兴岳婧婧安鸿雁吴延东李义
Owner JILIN COFCO BIOCHEM
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