Method for preparing acetylated distarch phosphate modified starch

A technology of distarch phosphate and modified starch is applied in the field of preparation of acetylated distarch phosphate modified starch, and can solve the problems of easy aging, poor freeze-thaw stability, poor film-forming and transparency, etc.

Inactive Publication Date: 2018-07-27
JILIN COFCO BIOCHEM +1
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  • Abstract
  • Description
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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 und

Method used

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  • Method for preparing acetylated distarch phosphate modified starch
  • Method for preparing acetylated distarch phosphate modified starch
  • Method for preparing acetylated distarch phosphate modified starch

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preparation example Construction

[0030] The preparation method of acetylated distarch phosphate modified starch of the present invention comprises the following steps:

[0031] (1) get waxy cornstarch and add distilled water and mix, and the starch emulsion that makes mass concentration is 40wt%;

[0032] (2) adjust the pH value of the starch emulsion to a set pH value with 3wt% sodium hydroxide solution, and add a selected amount of sodium trimetaphosphate (in terms of the dry basis content of the starch) as a cross-linking agent. Carry out the crosslinking reaction at a specified temperature for a period of time;

[0033] (3) After the cross-linking reaction is finished, adjust the pH value of the reaction solution to 8.0-8.5 with 0.5mol / L hydrochloric acid solution, and then add a selected amount of acetic anhydride (in terms of the dry content of the starch) in the reaction solution as an ester The esterification agent is carried out at a specified temperature for a period of time, and 3% sodium hydroxid...

Embodiment 1-29

[0037] In above-mentioned embodiment 1-28, the addition amount of described crosslinking agent, the temperature of described crosslinking reaction setting, pH value, reaction time, and the addition amount of described esterification agent, the setting temperature of described esterification reaction The temperature and reaction time are shown in Table 1 below.

[0038] The reaction condition setting of table 1 embodiment 1-29

[0039]

[0040]

Embodiment 29

[0042] The preparation method of the acetylated distarch phosphate modified starch described in the present embodiment comprises the following steps:

[0043] (1) get waxy cornstarch and add distilled water and mix, and the starch emulsion that makes mass concentration is 30wt%;

[0044] (2) Regulate the pH value of the starch emulsion with 2wt% sodium hydroxide solution to be 10, and add sodium trimetaphosphate that accounts for 7wt% of the dry basis content of the starch as a crosslinking agent, and carry out crosslinking at 40°C Link reaction 2h;

[0045] (3) After the cross-linking reaction is finished, adjust the pH value of the reaction solution to 8.0-8.5 with 0.4mol / L hydrochloric acid solution, then add acetic anhydride accounting for 3wt% of the dry basis content of the starch as an esterifying agent in the reaction solution, The esterification reaction was carried out at 25°C for 1.5 hours, and 2% sodium hydroxide solution was added dropwise during the reaction to ...

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Abstract

The invention specifically relates to a method for preparing acetylated distarch phosphate modified starch, belonging to the technical field of preparation of modified starch. The preparation method uses waxy corn starch as a raw material, sodium trimetaphosphate as a crosslinking agent and acetic anhydride as an esterification reagent, and prepares the desired acetylated distarch phosphate modified starch through crosslinking-acetylation reactions. The performance of the prepared acetylated distarch phosphate modified starch meets the requirements of market application fields thereof.

Description

technical field [0001] The invention belongs to the technical field of preparation of modified starch, and in particular relates to a preparation method of acetylated distarch phosphate modified starch. Background technique [0002] Starch is the main component of green plant fruits, seeds, and tubers, and 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 human diet and the main source of human energy. my country is a large agricultural country with rich starch resources and complete varieties, mainly including grain starch, potato starch, bean starch and other 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 prospec...

Claims

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Application Information

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IPC IPC(8): C08B31/00C08B31/04
CPCC08B31/003C08B31/04
Inventor 佟毅黄锦薛晓舟赵国兴岳婧婧安鸿雁吴延东李义
Owner JILIN COFCO BIOCHEM
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