Compound modified starch prepared by four kinds of denaturation methods

A technology of compound modified starch and starch, which is applied in the field of compound modified starch, can solve the problems of poor salt resistance and limitation of application fields of compound modified starch, and achieve the effects of good water absorption, good film-forming property and good application prospect

Active Publication Date: 2015-10-07
郝庆阳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compound modified starch prepared by this method has poor salt resistance, which limits its application field.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 : Add 1000 parts of water and 700 parts of ethanol with a mass percentage of 95% in a stirring container, stir 1000 parts of cornstarch into a slurry, add 100 parts of lye with a mass concentration of 5%, and 0.05 part of a crosslinking agent. Reaction at ℃ for about 2 hours; Add 350 parts of sodium chloroacetate with a mass percentage of 98%, add 50 parts of lye with a mass concentration of 35%, and react at 80 °C for 4 hours; Add 300 parts of mass percentage 99% Propylene oxide, in Carry out hydroxyalkyl reaction at 80°C for 6 hours; after the reaction is over, add 5 parts of urea and 5 parts of glycerin, and transport them to the pre-gelatinization dryer, adjust the temperature to 130-180°C, and after gelatinization reaction for 1-10 minutes, Dried, crushed, packaged. The product is irregular scales, 2% aqueous solution viscosity η=2000~7500mpa.s, degree of substitution D.S.>0.1, easy to dissolve in cold water, transparent solution, no stratification withi...

Embodiment 2

[0028] Example 2: Add 1,000 parts of water, 800 parts of mass percent 90% methanol, 1,000 parts of wheat starch into a slurry, add 80 parts of liquid caustic soda with a mass concentration of 10%, and 0.03 parts of a cross-linking agent, and react at 20-25°C 2 hours; Add 300 parts of mass percentage 99% propylene oxide, carry out hydroxyalkyl reaction at 80 ℃ for 6 hours; Add 300 parts of lye of mass concentration 35% and 330 parts of sodium chloroacetate of mass percentage 98%, at 80 Carboxymethylation reaction at ℃ for 4 hours; after the reaction, add 8 parts of urea and 4 parts of glycerin, transfer to the pre-gelatinization dryer, adjust the temperature to 130-180 ℃, after gelatinization reaction for 1-10 minutes, dry , shredded packaging. Product shape and performance are close to embodiment 1.

Embodiment 3

[0029] Example 3:Add 1000 parts of water and 700 parts of mass percentage 95% isopropanol, 1000 parts of potato starch in the mixing container, and stir into a slurry; add 50 parts of liquid caustic soda with a mass concentration of 10%, add 300 parts of mass percentage 99% epoxy Propane, carry out hydroxyalkyl reaction at 45°C for 6 hours; add 0.05 parts of cross-linking agent, react at 40-45°C for 2 hours; then add 300 parts of lye with a mass percentage of 35%, and 350 parts of chlorine Sodium acetate, carry out carboxymethylation reaction at 65°C for 4 hours; after the reaction, add 8 parts of urea and 4 parts of glycerin, transfer to the pre-gelatinization dryer, adjust the temperature to 130-180°C, gelatinization reaction 1-10 After 10 minutes, dry, pulverize, pack, product appearance and performance are similar to embodiment 1.

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PUM

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Abstract

The invention provides a process for preparing compound modified starch. The compound modified starch is obtained by starch modification through cross linking reaction, carboxymethyation reaction, hydroxyalkylation reaction and pre-gelatinization reaction; is advantageous in good performance, stable viscosity, rapid solution in cold water, good water-absorbing capability, strong re-hydration property, shear resistance, acid resistance and salt / alkali resistance; and has the characteristics of higher freezing stability and freeze / thawing stability, no flocculation or deposition and good film-forming property. Besides, the process can manufacture products with different performances by adjusting the quantity of auxiliary ingredients and adjusting the sequence of reactions, and has good application prospects in the fields of building mortar and coatings, petroleum drilling, textile printing and dyeing and the like.

Description

Technical field [0001] The present invention involves the preparation method of variability starch, especially a method of composite variability starch prepared through a variety of variability methods. Background technique [0002] Transsexual starch is replaced or derived by the starch through chemical or physical methods, so that some groups in the starch molecules are replaced or derived, thereby changing the many properties of the starch, so it is called a degeneration starch.At present, the production method of transgender starch is wet, dry and solvent method. Among them, the wet method is based on starch and water or other liquid media.In the process, starch particles are in a non -vulva state.During the degeneration process of starch, different treatment of starch can obtain different characteristics and meaning of use of significance. [0003] At present, the degeneration of starch mainly adopts pre -paste, carboxymethyl ether, hydroxyl, and cross -linking. Among them, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/12C08J3/24C08L3/02C08L3/08
Inventor 郝庆阳
Owner 郝庆阳
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