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Oxidized esterified composite modified starch and preparation method thereof

A technology of compound modified starch and oxidative esterification, applied in the field of starch compound modification processing, can solve the problems of complicated preparation process, insufficient reaction, low degree of product esterification, etc. Effect

Active Publication Date: 2013-12-11
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the existing oxidized-esterified starch preparation process is cumbersome, low product esterification degree, insufficient reaction and other problems, to provide a kind of oxidized-esterified starch and its preparation method

Method used

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  • Oxidized esterified composite modified starch and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this example, according to the ratio of 60 mesh tapioca starch, sodium hypochlorite oxidizing agent, citric esterifying agent and copper sulfate auxiliary agent 162g: 0.5mol: 0.6mol: 1.62g, starch, oxidizing agent, esterifying agent, and auxiliary agent were weighed respectively. The weighed starch was pretreated: drying at 100°C for 45 minutes, so that the water content of the starch was 5.0%. The starch after pretreatment is mixed with oxidant, esterifying agent, auxiliary agent, under the condition of 500rpm, mixes 10min to obtain mixed material, and mixed material is put into mechanical ball mill, and stirring ball mill is the mechanical ball mill of built-in zirconium ball, and zirconium ball (total volume) to the mixed material ratio is 300mL: 100g, the temperature is controlled at 45°C, stirred and activated for 50 minutes, so that the mixed material undergoes oxidation reaction and esterification reaction at the same time, and after the reaction is completed, ...

Embodiment 2

[0032] In this embodiment, according to the ratio of 40 mesh corn starch, potassium permanganate oxidizing agent, acetic anhydride esterifying agent, and potassium carbonate auxiliary agent, the ratio of 162g: 0.6mol: 0.5mol: 5.0g, respectively weigh starch, oxidizing agent, esterifying agent, auxiliary agent agent. The weighed starch was pretreated: drying at 110°C for 30 minutes, so that the water content of the starch was 2.0%. The starch after pretreatment is mixed with oxidant, esterifying agent, auxiliary agent, and under the condition of 1500rpm, mixes 20min to obtain mixed material, and mixed material is put into mechanical ball mill, and stirring ball mill is the mechanical ball mill of built-in zirconium ball, and zirconium ball (total volume) to the mixed material ratio is 300mL: 100g, the temperature is controlled at 50°C, stirred and activated for 60 minutes, so that the mixed material undergoes oxidation reaction and esterification reaction at the same time, and ...

Embodiment 3

[0035] In this example, the starch, oxidizing agent, and esterifying Agents, auxiliaries. The weighed starch was pretreated: drying at 115°C for 60 minutes, so that the water content of the starch was 3.0%. The starch after pretreatment is mixed with oxidant, esterifying agent, auxiliary agent, under the condition of 1000rpm, mixes 5min to obtain mixed material, mixed material is packed in mechanical ball mill, and stirring ball mill is the mechanical ball mill of built-in zirconium ball, and zirconium ball (total volume) to the mixed material ratio is 300mL: 100g, the temperature is controlled at 80°C, stirred and activated for 40 minutes, so that the mixed material undergoes oxidation reaction and esterification reaction at the same time, and after the reaction is completed, the oxidized esterified composite modified starch is obtained.

[0036] The product prepared in this example is tested and analyzed, and the product has a degree of esterification of 0.05, a whiteness o...

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Abstract

The invention belongs to the field of starch modification, and more specifically relates to an oxidized esterified composite modified starch modified by mechanical activation under solid phase conditions and a preparation method thereof. The oxidized esterified composite modified starch comprises 162g of starch, 0.1 to 1mol of an oxidizing agent, 0.1 to 1mol of an esterifying agent and 0.2 to 8g of an auxiliary agent. The preparation method comprises following steps: starch is subjected to drying pretreatment, and then all the ingredients above are delivered into a ball mill; the temperature is kept at 30 to 80 DEG C, the mixture is subjected to stirring activation for 40 to 90min so as to realize oxidation reaction and esterification reaction simultaneously, and then the oxidized esterified composite modified starch is obtained. Esterification degree of the products is 0.05 to 1.5; whiteness is 80 to 95, water content is 5 to 10%, water absorption is 1 to 5%, density is 0.8 to 1.2g / cm<3>, and the oxidized esterified composite modified starch is capable of achieving physical and chemical performance index requirments of GB / T12097, GB / T22427.6-2008 and GB / T12087-2008.

Description

technical field [0001] The invention belongs to the field of starch compound denaturation processing, in particular to a mechanically activated solid-phase oxidative esterification compound denatured starch and a preparation method thereof. Background technique [0002] Compound modified starch is a new type of modified starch developed at home and abroad in recent years. It refers to starch derivatives obtained by using two or more methods of modifying starch. The starch product obtained by the compound denaturation method has the common advantages of various modified starches. Studies have proved that the compound denaturation can improve the stability of starch to acid, heat and mechanical degradation, and delay the aging during storage. Oxidation-esterification compound modified starch is a kind of compound modified starch. It is a modified starch obtained by double modification of starch by oxidant oxidation and esterification by esterification agent. Double modifi...

Claims

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Application Information

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IPC IPC(8): C08B31/18C08B31/04
Inventor 胡华宇黄爱民黄祖强覃宇奔冯振飞张燕娟覃杏珍杨梅
Owner GUANGXI UNIV
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