Novel preparation method of octenyl succinic starch ester

A technology of octenyl succinic acid and starch ester, which is applied in the field of esterification modification of starch and octenyl succinic anhydride, can solve the problems of low reaction efficiency and low solubility, achieves simple and easy operation and improves synthesis efficiency , Improve the effect of emulsion stability

Inactive Publication Date: 2017-07-18
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the low solubility of OSA in water, it is difficult for OSA to fully contact with starch and pene

Method used

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  • Novel preparation method of octenyl succinic starch ester
  • Novel preparation method of octenyl succinic starch ester
  • Novel preparation method of octenyl succinic starch ester

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Experimental program
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Embodiment 1

[0017] Taking corn starch as an example: hot alkali freeze-dried OSA modified starch

[0018] (1) Starch pretreatment: mix cornstarch and a certain amount of water into 35% (w / w) starch milk, use 3% NaOH solution to adjust the pH of the emulsion to 8.5, place it in a 50°C water bath and stir 1 hour. Afterwards, the starch milk was transferred to a polypropylene bag, and liquid nitrogen (-196±1.0°C) was used for quick freezing, and finally the sample was freeze-dried, and then modified by OSA esterification;

[0019] (2) Synthesis of starch octenyl succinate: take the pretreated starch sample (dry basis) and mix it with a certain amount of water to form 35% (w / w) starch milk. Utilize 3% NaOH solution to adjust the pH of the emulsion to 8.5, dilute octenyl succinic anhydride (3%, relative to starch dry base) 5 times with absolute ethanol, and drop slowly into the starch milk within 2 hours. The whole reaction system maintained a pH of 8.5 and a temperature of 35°C. The reacti...

Embodiment 2

[0021] Using corn starch as an example: direct OSA modified starch after hot alkali

[0022] (1) Starch pretreatment: mix cornstarch and a certain amount of water into 35% (w / w) starch milk, use 3% NaOH solution to adjust the pH of the emulsion to 8.5, place it in a 50°C water bath and stir 1 hour. Thereafter, the starch milk was cooled to 35° C., and then directly modified by OSA esterification.

[0023] (2) Synthesis of octenyl succinic acid starch ester: utilize 3% NaOH solution to regulate the pH of starch milk to be 8.5, octenyl succinic anhydride (3%, relative starch dry base) is diluted 5 times with dehydrated alcohol, Add it dropwise into starch milk slowly within 2 hours. The whole reaction system maintained a pH of 8.5 and a temperature of 35°C. The reaction was carried out for 4 hours, and then the pH was adjusted to 6.5 with 3% hydrochloric acid solution. The obtained starch milk was centrifugally washed 3 times with water, and 3 times with absolute ethanol. T...

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Abstract

The present invention relates to a novel preparation method of starch octenyl succinate, the main technical point of which is to carry out hot alkali pretreatment on starch, and then adopt two methods of direct modification or modification after freeze-drying and then carry out octenyl Synthesis of starch octenyl succinate to improve the emulsification performance of the final product starch octenyl succinate. The invention has simple operation steps and low cost, and the octenyl succinic acid starch ester treated with hot alkali freeze-intervention has a higher degree of substitution and better emulsifying performance than the starch ester without pretreatment.

Description

technical field [0001] The invention relates to the field of chemical modification of starch, in particular to the esterification modification of starch and octenyl succinic anhydride. Background technique [0002] Starch is a natural polysaccharide molecule that is widely available, inexpensive, biodegradable and renewable, and available in large quantities. However, native starch has disadvantages such as low shear resistance, poor thermodynamic properties, weak acid resistance and easy retrogradation, which seriously affects its application in industry. The purpose of modifying starch is to eliminate the defects of native starch and make it better used in industrial production. [0003] The chemical modification method is a relatively mature starch treatment method currently used. The starch treatment capacity is large, and it is easy to realize industrialization for mass production. A large part of the chemical modification of starch is through derivatization, such as ...

Claims

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Application Information

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IPC IPC(8): C08B31/04
CPCC08B31/04
Inventor 王书军李天贵王硕刘冰
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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