A kind of preparation method of diesterification composite starch

A compound type, double-esterification technology, applied in the field of starch processing, can solve the problems of low degree of long-chain esterification reaction, difficulty in meeting environmental protection emulsification performance, low starch utilization rate, etc., achieve good application effect, improve chemical reaction, The effect of lowering the gelatinization temperature

Active Publication Date: 2015-09-23
GUANGXI UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the existence of complex preparation process procedures in the preparation method of double-esterified starch, high cost due to the difficulty of controlling the liquid phase involved in the reaction, low starch utilization rate due to the lack of pretreatment of the esterification agent and starch before the reaction, and the esterification of the product. The low degree of substitution leads to poor physical and chemical properties of the product, which is difficult to meet the environmental protection and the needs of microcapsules for starch emulsification performance. Method for preparing double-esterified composite starch

Method used

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  • A kind of preparation method of diesterification composite starch

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Effect test

Embodiment 1

[0023] The short-chain acid (anhydride) esterification agent 1 used in this example is a composition composed of acetic acid and succinic anhydride in a weight ratio of 3:1; the long-chain acid (anhydride) esterification agent 2 is octenyl succinic anhydride ; Catalyst is K 2 CO 3 and Na 2 CO 3 According to the weight ratio of 0.2g:0.3g mixed composition.

[0024]According to the ratio of starch: short-chain acid (anhydride) esterification agent 1: long-chain acid (anhydride) esterification agent 2: catalyst=100g: 4g: 3g: 0.5g, the reaction material is weighed, after the reaction material is mixed evenly, add to In microwave equipment, microwave treatment for 10 minutes under the condition of 750W. Step 2) mechanical activation: put the reaction material after microwave treatment into a ball mill, and add a short-chain acid (anhydride) esterification agent 1 equivalent to 2.5% of the weight of the reaction material to control the reaction material and ball (pile volume) R...

Embodiment 2

[0027] The short-chain acid (anhydride) esterification agent 1 used in this example is acetic anhydride; the long-chain acid (anhydride) esterification agent 2 is lauric acid, palmitic acid, stearic acid according to the weight ratio 1g: 1g: 2g mixed The composition; the catalyst is NaOH.

[0028] According to the ratio of starch: short-chain acid (anhydride) esterification agent 1: long-chain acid (anhydride) esterification agent 2: catalyst=100g: 1g: 4g: 0.7g, the reaction material is weighed, after the reaction material is mixed evenly, add to In microwave equipment, microwave treatment under the condition of 500W for 8min. Step 2) mechanical activation: put the reaction material after microwave treatment into a ball mill, and add a short-chain acid (anhydride) esterification agent 1 equivalent to 4% of the weight of the reaction material to control the reaction material and ball (pile volume) Ratio = 100g: 200ml, stirring at a low speed at 40°C for 70 minutes for esterifi...

Embodiment 3

[0031] The short-chain acid (anhydride) esterifying agent 1 used in the present embodiment is the composition that adipic acid and succinic acid mix according to weight ratio 1g:2g; The long-chain acid (anhydride) esterifying agent 2 is stearic acid ; Catalyst is H 2 SO 4 (50% aqueous sulfuric acid).

[0032] According to the ratio of starch: short-chain acid (anhydride) esterification agent 1: long-chain acid (anhydride) esterification agent 2: catalyst=100g: 3g: 3.5g: 0.1g, the reaction material is weighed, after the reaction material is mixed uniformly, add In the microwave equipment, microwave treatment under the condition of 650W for 2min. Step 2) Mechanical activation: put the microwave-treated reaction material into a ball mill, and add short-chain acid (anhydride) esterification agent 1 equivalent to 1.5% by weight of the reaction material: long-chain acid (anhydride) esterification agent 2 : Catalyst=3g: 3.5g: 0.1g ratio mixed composition, control the ratio of reac...

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Abstract

The invention relates to the field of starch processing, and particularly relates to double-esterified compound type starch prepared by a microwave-mechanical activation solid-phase method. The method comprises the steps of firstly uniformly mixing starch, an esterifying agent 1, an esterifying agent 2 and a catalyst according to certain proportion; performing 500-750W microwave treatment for 2-15 minutes; then putting the reaction material into a ball mill with pellets, and supplementing a certain amount of esterifying agent and catalyst; stirring at a low speed at 30-80 DEG C for an esterification reaction for 20-90 minutes to obtain a crude product; washing the coarse product with hot ethanol, and drying under a ventilation condition to obtain a product of double-esterified compound type starch. The method is simple in process and easy to operate, and prevents emission of 'three wastes' in the production process. The utilization rate of the starch exceeds 95%, the substitution degree of the product can reach 0.05, and the product has a good application effect.

Description

technical field [0001] The invention relates to the field of starch processing, in particular to a method for preparing double-esterified composite starch by using a microwave-mechanical activation solid-phase method. Background technique [0002] Starch ester is an important type of modified starch, which refers to a type of modified starch obtained by esterifying the hydroxyl groups in the starch structure with organic acids or inorganic acids. The current starch esterification products mainly include starch acetate, starch phosphate, starch xanthate, starch nitrate and other short-chain organic acids or inorganic acid esters, as well as starch stearate and starch octenyl succinate. Isochorectin starch esters. However, there are few studies on the combined denaturation of starch diesterification. Although monoesterified starch has better processing performance than native starch, it often has single performance. In order to meet the higher processing requirements of mode...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/04
Inventor 胡华宇蓝焕师黄爱民黄祖强杨梅冯振飞覃杏珍覃宇奔
Owner GUANGXI UNIV
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