Palmitic acid modified tapioca starch preparation method

A tapioca starch and palmitic acid technology, applied in the field of starch modification, can solve the problems of low reaction efficiency of palmitic acid modified starch, and achieve the effects of improving esterification degree and reaction efficiency, simple operation and reducing side reactions of hydrolysis

Inactive Publication Date: 2019-04-23
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional wet preparation process is limited by hydrolysis side reactions, and the reaction efficiency of palmitic acid modified starch is low

Method used

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  • Palmitic acid modified tapioca starch preparation method
  • Palmitic acid modified tapioca starch preparation method
  • Palmitic acid modified tapioca starch preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Take 100 parts of dry tapioca starch and add it to the kneader, then dissolve 4 parts of sodium bicarbonate in an appropriate amount of distilled water, control the water content of the system to 20%, add it to the starch, mix well, activate the starch hydroxyl group, add 3 Parts of Sodium Chloride.

[0019] 2. Then add 20 parts of palmitic acid, mix thoroughly for 5-10 minutes, keep the temperature at 135°C, and react for 2 hours to obtain a white solid crude product.

[0020] 3. After the reaction, take it out and cool it to room temperature, and grind it through a 100-mesh sieve.

[0021] 4. Wash 2-3 times with 70% ethanol solution, then dry the product in an oven at 45°C, crush it, add 1 part of silicon dioxide, and set aside.

Embodiment 2

[0023] 1. Take 100 parts of dry tapioca starch and add it to the kneader, then dissolve 4 parts of sodium carbonate in an appropriate amount of distilled water, control the water content of the system to 20%, add it to the starch, mix thoroughly to activate the starch hydroxyl group, and add 3 parts potassium chloride.

[0024] 2. Then add 9 parts of palmitic acid, mix thoroughly for 5-10 minutes, keep the temperature at 130°C, and react for 3 hours to obtain a white solid crude product.

[0025] 3. After the reaction, take it out and cool it to room temperature, and grind it through a 100-mesh sieve.

[0026] 4. Wash 2-3 times with 70% ethanol solution, then dry the product in an oven at 45°C, crush it, add 1 part of bentonite, and set aside.

Embodiment 3

[0028] 1. Take 100 parts of dry tapioca starch and add it to the kneader, then dissolve 4 parts of disodium hydrogen phosphate in an appropriate amount of distilled water, control the water content of the system to 20%, add it to the starch, and mix thoroughly to activate the starch hydroxyl group, add 2 parts sodium chloride.

[0029] 2. Then add 13 parts of palmitic acid, mix thoroughly for 5-10 minutes, keep the temperature at 125°C, and react for 3 hours to obtain a white solid crude product.

[0030] 3. After the reaction, take it out and cool it to room temperature, and grind it through a 100-mesh sieve.

[0031] 4. Wash 2-3 times with 70% ethanol solution, then dry the product in an oven at 45°C, crush it, add 1 part of silicon dioxide, and set aside.

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PUM

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Abstract

The invention discloses a palmitic acid modified tapioca starch preparation method, which comprises: adding water to a catalyst, controlling the water content of the system at 15-25%, adding the obtained material to tapioca starch, completely mixing, adding a dispersing agent, and mixing; and adding palmitic acid, carrying out a reaction at a temperature of 105-135 DEG C to obtain the palmitic acid modified tapioca starch. According to the present invention, by using the semi-dry process, the occurrence of hydrolysis side reactions can be effectively reduced so as to greatly improve the esterification degree and the reaction efficiency of starch and palmitic acid, the obtained product has advantages of high grafting rate and high reaction efficiency, and the method has advantages of low production cost, simple operation and the like.

Description

technical field [0001] The invention relates to the field of starch modification, in particular to a preparation method of palmitic acid modified cassava starch. Background technique [0002] Starch palmitate is a new type of long-chain fatty acid starch ester, and its chemical structure belongs to the category of starch organic acid esters. It is an important starch derivative and has a wide range of applications. At present, its synthesis methods are mainly organic solvent method and biological enzyme method. The modified starch has obtained many excellent properties, such as improving the freeze-thaw stability of paste liquid and reducing aging. The traditional wet preparation process is limited by the side reaction of hydrolysis, and the reaction efficiency of palmitic acid modified starch is low. Contents of the invention [0003] The purpose of this invention is to provide a kind of preparation method of palmitic acid modified tapioca starch, to solve the above-ment...

Claims

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Application Information

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IPC IPC(8): C08B31/04
CPCC08B31/04
Inventor 施晓旦沈安成金霞朝
Owner SHANGHAI DONGSHENG NEW MATERIALS
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