A kind of amphiphilic composite modified starch derivative and its preparation method

A technology of starch derivatives and compound modification, applied in the field of compound modified starch, can solve the problems such as the inability to meet the rapid development of the industry, poor swelling of esterified starch, poor film toughness, etc., achieve good solubility and emulsification, and significantly increase Viscosity and property improvement effect

Active Publication Date: 2020-01-07
GUANGZHOU GLORYSTAR CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current modified starches include hydroxypropyl starch, esterified starch, etc. Among them, hydroxypropyl starch has defects such as poor film toughness and poor emulsification, while esterified starch has the characteristics of poor swelling and low viscosity, so it is far from being able to Meet the needs of the rapid development of the industry

Method used

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  • A kind of amphiphilic composite modified starch derivative and its preparation method
  • A kind of amphiphilic composite modified starch derivative and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0038] (1) pretreatment: adding 95% aqueous ethanol solution to potato starch to prepare starch milk with a concentration of 15% wt;

[0039] (2) Hydroxypropylation treatment: in the starch after step (1) pretreatment, add the sodium hydroxide (being sodium hydroxide aqueous solution, mass concentration is 40%) of starch quality 1%wt under stirring, and starch Propylene oxide with a mass of 20% wt, seal the reactor, let it stand at room temperature for 30 minutes, heat it to 50°C, stir and react for 6 hours, and neutralize it with acid until the pH is 6;

[0040] (3) maleic anhydride esterification treatment: in the starch that is processed through step (2) hydroxypropylation, add the maleic anhydride that quality is starch quality 15%, maintain the pH value of system at 10 with sodium hydroxide solution After 3 hours of reaction, the pH value of the system was adjusted to 6 with maleic acid;

[0041] (4) Surface treatment: add 0.06% polyvinylpyrrolidone to the composite modi...

Embodiment 2

[0044] (1) Pretreatment: adding 95% ethanol to wheat starch to prepare starch milk with a concentration of 25% wt;

[0045] (2) Hydroxypropylation treatment: in the starch after the pretreatment of step (1), add under stirring the quality of the starch is 2% potassium hydroxide (for sodium hydroxide aqueous solution, the mass concentration is 45%) and the quality of the starch 100% propylene oxide, seal the reactor, let it stand at room temperature for 30 minutes, heat it to 60°C, keep it warm for 20 hours, and neutralize it with acid until the pH is 8;

[0046] (3) maleic anhydride esterification treatment: in the starch that is processed through step (2) hydroxypropylation, add weight and be starch quality 50% maleic anhydride, maintain the pH value of system at 9 with sodium hydroxide solution, After 2 hours of reaction, the pH value of the system was adjusted to 7 with acid;

[0047] (4) Surface treatment: add 0.07% glyoxal to the composite modified starch prepared in ste...

Embodiment 3

[0050] (1) Pretreatment: adding 95% ethanol to sodium hypochlorite oxidized cornstarch to prepare starch milk with a concentration of 50% wt;

[0051] (2) Hydroxypropylation treatment: in the starch after step (1) pretreatment, stir and add the sodium hydroxide of starch quality 5% (being sodium hydroxide aqueous solution, mass concentration is 40%), and starch quality 50% % propylene oxide, seal the reactor, let it stand at room temperature for 30 minutes, heat it to 60°C, keep it warm for 12 hours, and neutralize it with acid until the pH is 7;

[0052] (3) maleic anhydride esterification treatment: in the starch that is processed through step (2) hydroxypropylation, add weight and be starch quality 25% maleic anhydride, maintain the pH value of system at 11 with sodium hydroxide solution, After 4 hours of reaction, the pH value of the system was adjusted to 8 with acid;

[0053] (4) Surface treatment: add polyvinylpyrrolidone with a starch mass of 0.05% to the composite modi...

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Abstract

The invention provides an amphiphilic compound modified starch derivative and a preparation method thereof. The preparation method of the amphiphilic compound modified starch derivative successively comprises a pretreatment step, a hydroxypropyl etherification treatment step, a maleic anhydride esterification treatment step and a surface treatment step, wherein the sequences of the hydroxypropyl etherification treatment step and the maleic anhydride esterification treatment step can be exchanged; the pretreatment step comprises a substep of preparing starch into starch milk by using alcohol; the hydroxypropyl etherification treatment step comprises substeps of adding alkaline reagents and epoxypropane into the product obtained by the former step, heating to 50-80 DEG C and reacting for 6-24 hours, and then adjusting the pH to be 6-8; the maleic anhydride esterification treatment step comprises substeps of adjusting the pH value of the product obtained by the former step to be 8-11, adding maleic anhydride and reacting for 1-6 hours, and then adjusting the pH to be 6-8; the surface treatment step comprises substeps of adding surface treatment agents into the product obtained by the former step, stirring and mixing. The prepared amphiphilic compound modified starch derivative has high solubility, viscosity, granularity and emulsibility.

Description

technical field [0001] The invention belongs to the field of compound modified starch, in particular to an amphiphilic modified starch derivative compound modified by hydroxypropyl and maleic anhydride and a preparation method thereof. Background technique [0002] Starch is a carbohydrate formed by plants through photosynthesis. It has a wide range of sources, is cheap, and returns to nature in the form of carbon dioxide and water after degradation. It is considered to be a natural and renewable material that is completely pollution-free. In the non-edible field Has been extensively researched and developed. Due to the shortcomings of starch insolubility in cold water, poor shear resistance, poor water resistance and lack of melt fluidity, it is difficult to use it alone as a polymer material, and it needs to be chemically and physically modified to enhance certain functions or form new materials. physical and chemical properties. [0003] The current modified starches in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/16C08L3/06C08L3/08C08L33/26C08L39/06C08K5/07
CPCC08B31/16C08K5/07C08L3/06C08L3/08C08L33/26C08L39/06
Inventor 余欢张本山汪建平郑义来廖伟屈哲辉
Owner GUANGZHOU GLORYSTAR CHEM
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