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Preparation method of starch and fatty acid compound

A fatty acid and compound technology, which is applied in the field of starch fatty acid compound preparation, can solve the problems of operation explosion, complicated operation, and easy skin penetration, and achieve the effects of ensuring safety and environmental protection, increasing the probability of compounding, and mild process conditions

Inactive Publication Date: 2015-10-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Starch-lipid complexes generally exist naturally, and their industrial preparation methods are relatively complicated, mainly the ionic depolymerization method, that is, the water / dimethyl sulfoxide method. This method is complicated to operate, costly, and takes a long time. Methyl sulfoxide organic solvent has certain toxicity, it is easy to penetrate the skin, and there is a danger of explosion in operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Humid heat treatment of starch: Take cornstarch, add deionized water, adjust the water content of starch to 18wt%, move it into a stainless steel reactor and seal it, place it at room temperature for 24h to balance the moisture, put it in an oven at 110°C for 5h, take it out , cooled, and crossed a 100-mesh sieve to obtain the starch after the heat-and-moisture treatment;

[0031] (2) Enzyme treatment and modification: add a pH value of 3.5 to 4.0 disodium hydrogen phosphate-citric acid buffer solution to the starch after the heat and humidity treatment to prepare a starch solution with a mass concentration of 20%, and place it in a water bath at 35°C for pretreatment. Heat for 10 minutes; add 2u / g (starch dry basis) pullulan enzyme solution to react for 4 hours, add 4% sodium hydroxide solution to inactivate the enzyme, centrifuge, wash the precipitate with water and suction filter 3 times, dry, and pass through 100 mesh Sieve to obtain enzyme-treated modified star...

Embodiment 2

[0034] (1) Humid heat treatment of starch: Take wheat starch, add deionized water, adjust the water content of starch to 30wt%, move it into a stainless steel reactor and seal it, place it at room temperature for 24 hours to balance the water, put it in an oven with a temperature of 118°C for 7 hours, and take it out , cooled, and crossed a 100-mesh sieve to obtain the starch after the heat-and-moisture treatment;

[0035] (2) Enzyme treatment modification: add a pH value of 3.5 to 4.0 disodium hydrogen phosphate-citric acid buffer solution to the wet heat treated starch to prepare a starch solution with a mass concentration of 30%, and place it in a water bath at 38°C for pretreatment. Heat for 10 minutes; add 3u / g (starch dry basis) pullulan enzyme solution to react for 3.5 hours, add sodium hydroxide solution with a mass concentration of 4% to inactivate the enzyme, centrifuge, wash the precipitate with water and suction filter 4 times, dry, pass through 100 mesh sieve to o...

Embodiment 3

[0038] (1) Humid heat treatment of starch: Take potato starch, add deionized water, adjust the water content of starch to 35wt%, move it into a stainless steel reactor and seal it, place it at room temperature for 24 hours to balance the water, put it in an oven at 125°C for 8 hours, and take it out , cooled, and crossed a 100-mesh sieve to obtain the starch after the heat-and-moisture treatment;

[0039](2) Enzyme treatment modification: Add a pH value of 3.5 to 4.0 disodium hydrogen phosphate-citric acid buffer solution to the wet heat treated starch to prepare a starch solution with a mass concentration of 45%, and place it in a water bath at 40°C for pretreatment. Heat for 10 minutes; add 5u / g (starch dry basis) pullulan enzyme solution to react for 5 hours, add 4% sodium hydroxide solution to inactivate the enzyme, centrifuge, wash the precipitate with water and suction filter 5 times, dry, and pass through 100 mesh Sieve to obtain enzyme-treated modified starch;

[0040...

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PUM

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Abstract

The invention belongs to the technical field of natural polymer modification and discloses a preparation method of a starch and fatty acid compound. The method comprises the following steps: adding de-ionized water into starch and balancing moisture in a closed container; carrying out heat treatment to obtain the starch subjected to wet and hot treatment; then adding a buffering solution to prepare a starch solution; after pre-heating, adding 2 to 5u / g pullulanase liquid to react for 4 to 5 hours; after carrying out enzyme deactivation, centrifuging and separating to obtain enzyme treatment modified starch; then stirring and gelatinizing the starch in a boiled water bath for 25 to 45 minutes and cooling to 60 to 90 DEG C to obtain gelatinized starch; then transferring the gelatinized starch into a homogenizing machine and adding fatty acid to carry out homogenization and mixing; and keeping the heat of the water bath to synthesize for 30 to 40 minutes to obtain the starch and fatty acid compound. According to the preparation method, a greener and more environment-friendly new way is provided for synthesizing the starch and fatty acid compound through wet and hot treatment and controlled enzymolysis treatment by adopting a gelatinizing method.

Description

technical field [0001] The invention belongs to the technical field of natural polymer modification, and in particular relates to a preparation method of a starch fatty acid compound. Background technique [0002] The range of natural polymers involves polysaccharides and proteins, polysaccharides and polysaccharides, polysaccharides and lipids, etc., mainly through the connection and compounding of some groups on the macromolecules, so as to improve and endow the system with some unique functional properties and processing characteristics. And quality characteristics, and finally expand its application range. Starch-lipid is one of them. The formation of starch-lipid complex can improve the texture and structural stability of starch-based materials, reduce viscosity, change freeze-thaw stability and delay aging, and adjust the hydrophobicity and degradation of the mixed system. , complexation performance and other functional properties, and the lipids contained in it can c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/04C08B30/12C12P19/16
Inventor 胡飞孙宁
Owner SOUTH CHINA UNIV OF TECH
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