Process for preparing modified composite denatured starch by microwave acidiolysis and esterification

A technology of compound modified starch and esterification modification, which is applied in the field of modified starch to achieve the effects of improving reaction efficiency, reducing costs and good economic benefits

Inactive Publication Date: 2006-03-22
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the process of preparing compound modified starch by s

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  • Process for preparing modified composite denatured starch by microwave acidiolysis and esterification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 2g of stearic acid, dissolve it in 80ml of 70°C absolute ethanol, add 0.05g of hydrochloric acid, keep the temperature at 70°C without adding water, then slowly add 100g of starch (dry basis) and keep stirring to obtain a uniform mixture. Put the mixture into a container and place it in a 700W microwave oven for reaction, heat intermittently for 30s, stir rapidly, and irradiate with microwaves for 3 minutes, cool and pulverize to obtain the finished starch stearate. The microwave oven is the NJL07-3 experimental microwave oven produced by Nanjing Jiequan Microwave Equipment Co., Ltd., the same below.

[0028] Prepare stearyl starch ester with stearic acid and starch reaction, adopt common pressure dry method, microwave normal pressure dry method and microwave vacuum dry method three different methods to prepare the product performance of stearic acid starch ester as shown in table 1 . The reaction efficiency is the ratio of the actual degree of substitution to th...

Embodiment 2

[0034] Weigh 4g of lauric acid, dissolve it in 120ml of 70°C absolute ethanol, add 0.2g of acetic acid, and at the same time add 40ml of water to maintain the temperature at 70°C, then slowly add it to 100g of starch (dry basis), and keep stirring to obtain a homogeneous mixture , Put the mixture into a container and place it in a 1200W microwave oven to evacuate it for reaction. The microwave radiation time is 10 minutes. After cooling, it is pulverized to obtain the finished starch laurate ester.

Embodiment 3

[0036] Linoleic acid is used as esterifying agent, and all the other prescriptions and operating conditions are the same as embodiment 1 or embodiment 2, and make finished product linoleic acid starch ester.

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Abstract

The present invention belongs to the field of denatured starch technology. Under normal pressure or vacuum microwave condition, starch is acidolyzed and esterified simultaneously to prepare compositely denatured starch product. The compositely denatured starch product has the properties of both esterified starch and acidolyzed starch, and may be used as fat substituent in producing low fat butter, ice cream, salad paste, and as Arabic gum substituent as microcapsule material. The present invention combines acidolysis, esterification and microwave treatment, and has the advantages of short reaction time, high reaction efficiency, less environmental pollution and excellent product performance.

Description

technical field [0001] The invention relates to a preparation method and application of compound modified starch which is simultaneously modified by acid hydrolysis and esterification under the condition of microwave radiation, and belongs to the technical field of modified starch. technical background [0002] Fatty acid starch ester is an esterification product obtained by reacting starch and its derivatives with fatty acid, fatty acid methyl ester, fatty acid chloride or fatty acid anhydride. Due to the introduction of hydrophobic organic carbon chains, the hydrophobicity of starch increases, which makes it possess the amphiphilic properties of hydrophilic and lipophilic, and has emulsifying properties, which can be used in food, medicine, daily chemicals and other fields. Fatty acid starch esters with a high degree of substitution have high emulsifying ability and can be used in microencapsulated products to obtain a high embedding rate, replacing expensive gum arabic; f...

Claims

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Application Information

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IPC IPC(8): C08B31/04
Inventor 张燕萍史巧玲
Owner JIANGNAN UNIV
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