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Method for preparing pregelatinization-acid hydrolysis-esterification ternary compound modified starch and use thereof

A compound modified starch and esterification ternary technology is applied in the field of modified starch to achieve the effects of easy gelatinization, enhanced emulsification ability, and less environmental pollution

Inactive Publication Date: 2009-06-17
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no relevant data report on the preparation of modified starch by pregelatinization-acidolysis-esterification ternary compound reaction.

Method used

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  • Method for preparing pregelatinization-acid hydrolysis-esterification ternary compound modified starch and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 3g of stearic acid and dissolve it in 120mL of absolute ethanol at 30°C, add 0.05g of hydrochloric acid with a mass (hydrochloric acid content) of 38%, then add 25mL of water, and then slowly add 100g of refined separated wheat A starch (quality on a dry basis), and constantly stir uniformly to obtain a uniform slurry; the uniform slurry is desolventized at medium temperature, and pre-gelatinization and acidolysis are performed at the same time. The desolventizing temperature is 80 ℃ and 80 ℃ Stir intermittently under the conditions, and the time for desolvation is 1h; then carry out high temperature reaction, carry out pregelatinization, acidolysis and esterification reactions at high temperature, the reaction temperature is 150℃, and the reaction time is 3h; then carry out cooling, crushing, and packaging , That is, the finished starch stearate.

[0018] Table 1: Comparison of the emulsification ability of native starch with a mass fraction of 1% and starch stearate...

Embodiment 2

[0021] Weigh 4g palmitic acid and dissolve it in 150mL of 30°C absolute ethanol, add 0.1g of hydrochloric acid with a mass (hydrochloric acid content) of 38%, then add 30mL of water, and then slowly add 100g (dry basis mass) Stir the starch evenly to obtain a uniform slurry; stir the slurry intermittently at 80°C to remove the solvent, and perform pre-gelatinization and acidolysis at the same time. The desolvation time is 1h; then the high-temperature reaction is carried out, and the pre-gluing is carried out at high temperature. The reaction temperature is 150 DEG C, and the reaction time is 3 hours; then cooling, crushing, and packaging are performed to obtain the finished starch palmitate.

[0022] Table 2 Comparison of milk viscosity of 15% original starch and starch palmitate

[0023] Degree of substitution 0 0.0070 0.0105 0.0138 Viscosity / mPa·S 1000 30 26 22

[0024] Note: Use NDJ-5S digital viscometer to measure the viscosity of starch liquid afte...

Embodiment 3

[0026] Weigh 4g of oleic acid and dissolve it in 150mL of absolute ethanol at 30°C, add 0.1g of hydrochloric acid (hydrochloric acid content) of 38% by mass, then add 30mL of water, and then slowly add 100g (dry basis mass) of starch , Stir uniformly to obtain a uniform slurry; stir the slurry intermittently at 80°C to remove the solvent, and perform pre-gelatinization and acidolysis at the same time. The desolventization time is 1h; then perform high-temperature reaction and perform pre-gelatinization at high temperature , Acidolysis and esterification reaction, the reaction temperature is 150℃, and the reaction time is 3h; then cooling, crushing, and packaging are performed to obtain the finished starch oleate.

[0027] Table 3 Changes in embedding rate of powdered oil prepared with starch oleate as the wall material of the microcapsules, and the embedding rate of the product stored in the dark at 25℃ for one month

[0028] Storage time / day 0 7 14 21 28 Embedd...

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Abstract

The invention relates to a preparation method for pregelatinization-acidolysis-esterification ternary composite modified starch and application thereof. The preparation method comprises the following steps: a, dissolving 2g to 4g of an esterification reagent in 120mL to 150mL of anhydrous alcohol with the temperature of 25 to 40 DEG C, then adding 0.05g to 0.15g of 38 mass percent hydrochloric acid, and adding 15mL to 30mL of water; b, taking 100g of starch counted on a dry basis, adding the starch into the solvent prepared in the step a, and stirring the starch evenly in the solvent to obtain even slurry; c, carrying out the moderate temperature exsolution of the even slurry prepared in the step b, simultaneously carrying out pregelatinization and acidolysis, and setting the exsolution temperature between 55 and 80 DEG C and the exsolution time between 0.5h and 2h; and then carrying out a high temperature reaction, carrying out the pregelatinization-acidolysis-esterification action at the high temperature, and setting the reaction temperature between 120 and 160 DEG C and the reaction time between 2h and 5h; and d, cooling down and crushing the product obtained in the step c so as to obtain the modified starch simultaneously having the multiple characteristics of pregelatinized starch, acidified starch and esterified starch.

Description

Technical field [0001] The invention relates to the technical field of modified starch, in particular to a preparation method and application of a pregelatinized-acidolysis-esterified ternary composite modified starch. technical background [0002] Starch stearate is a long-chain fatty acid starch ester. After the hydrophobic long-chain fatty acid partially replaces the hydroxyl group in the starch molecule, the product has both hydrophobic and hydrophilic properties. It can be used as an emulsifier and used in food, Medicine, materials, daily chemicals and other fields. Regarding the reports of starch stearate, there have been reports of high-temperature esterification of starch with different degrees of hydrolysis as raw materials and fatty acids. There is a domestic report that Zhang Yanping of Jiangnan University conducts acid hydrolysis and esterification to prepare modified starch at the same time, and has applied for a patent. However, there are no relevant reports about t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/00A23L1/09A23L1/035A23L1/19A23L29/30
Inventor 李琳刘国琴韩立鹏
Owner HENAN UNIVERSITY OF TECHNOLOGY
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