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Preparation method of sweet potato carboxymethyl modified starch

A modified starch and carboxymethyl technology, applied in the field of modified starch, can solve the problems of low degree of substitution of carboxymethyl starch, inconvenient preparation, and easy pollution in the preparation process, and achieve a high degree of substitution, good quality, and simple preparation Effect

Inactive Publication Date: 2018-11-16
SHANDONG SHENZHOU XIANGYU TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Carboxymethyl starch has been studied for a long time in the world, but the existing carboxymethyl modified starch still has problems such as inconvenient preparation and easy pollution during the preparation process, and the prepared carboxymethyl starch also has a relatively low degree of substitution. low problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of sweet potato carboxymethyl modified starch, comprising the following steps:

[0024] 1) Add an ethanol solution 10 times the weight of the starch to the sweet potato starch, stir and mix evenly, place in a water bath at 30° C. for 8 minutes, and obtain the mixed solution I after cooling;

[0025] 2) Add an acid agent dropwise to the mixed solution I obtained in step 1), adjust the pH to 3, raise the temperature to 60°C, and react for 20 minutes to obtain the mixed solution II;

[0026] 3) Add glycerol dropwise to the mixed solution II obtained in step 2), stir evenly, and after completion, microwave treatment for 30 minutes, and perform centrifugation to obtain starch crude filtrate;

[0027] 4) Concentrating the coarse starch filtrate obtained in step 3) in a vacuum environment at a concentration temperature of 40° C. until the weight of the coarse starch filtrate reaches 1 / 6 of that before concentration to obtain starch concentrate I;

[0028]...

Embodiment 2

[0037] A preparation method of sweet potato carboxymethyl modified starch, is characterized in that, comprises the following steps:

[0038] 1) Add an ethanol solution 12 times the weight of the starch to the sweet potato starch, stir and mix evenly, place in a water bath at 32°C for 8 minutes, and obtain the mixed solution I after cooling;

[0039] 2) Add an acid agent dropwise to the mixed solution I obtained in step 1), adjust the pH to 3, raise the temperature to 65°C, and react for 22 minutes to obtain the mixed solution II;

[0040] 3) Add glycerin dropwise to the mixed solution II obtained in step 2), stir evenly, after completion, microwave treatment for 35 minutes, and perform centrifugation to obtain starch crude filtrate;

[0041] 4) Concentrating the coarse starch filtrate obtained in step 3) in a vacuum environment at a concentration temperature of 45° C. until the weight of the coarse starch filtrate reaches 1 / 5 of that before concentration to obtain starch conce...

Embodiment 3

[0051] A preparation method of sweet potato carboxymethyl modified starch, is characterized in that, comprises the following steps:

[0052] 1) Add an ethanol solution 12 times the weight of the starch to the sweet potato starch, stir and mix evenly, place in a water bath at 35°C for 9 minutes, and obtain the mixed solution I after cooling;

[0053] 2) Add an acid agent dropwise to the mixed solution I obtained in step 1), adjust the pH to 4, raise the temperature to 70°C, and react for 25 minutes to obtain the mixed solution II;

[0054] 3) Add glycerol dropwise to the mixed solution II obtained in step 2), stir evenly, and after completion, microwave treatment for 40 minutes, and perform centrifugation to obtain starch crude filtrate;

[0055] 4) Concentrating the coarse starch filtrate obtained in step 3) in a vacuum environment at a concentration temperature of 50° C. until the weight of the coarse starch filtrate reaches 1 / 5 of that before concentration to obtain concentr...

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Abstract

The invention discloses a preparation method of sweet potato carboxymethyl modified starch. The preparation method comprises the following steps: (1) adding an ethanol solution in sweet potato starch,uniformly stirring and mixing, heating in water bath, and cooling, thus obtaining a mixed solution I; (2) dropwise adding an acid agent in the mixed solution I which is obtained in step (1), thus obtaining a mixed solution II; (3) dropwise adding glycerinum in the mixed solution II obtained in step (2), carrying out microwave treatment, and carrying out centrifugal separation, thus obtaining starch coarse filtrate; (4) concentrating the starch coarse filtrate under a vacuum environment, thus obtaining a starch concentrated solution I; (5) carrying out high-voltage pulse electric field treatment on the starch concentrated solution I obtained in step (4), thus obtaining starch concentrated solution II; (6) adding the ethanol solution in the starch concentrated solution II obtained in step (5), thus obtaining precipitate; (7) drying the precipitate obtained in the step (6). The sweet potato carboxymethyl modified starch prepared through the preparation method of the sweet potato carboxymethyl modified starch, disclosed by the invention, is high in substitution degree and good in quality.

Description

technical field [0001] The invention relates to the technical field of modified starch, in particular to a method for preparing sweet potato carboxymethyl modified starch. Background technique [0002] Sweet potato starch is a natural renewable resource. my country is a big producer of sweet potato starch. It is cheap, easy to gelatinize, and has high chemical reactivity. It is suitable for the preparation of modified starch. The carboxymethylation of starch is the process of etherifying starch to modify starch. The modified carboxymethyl starch (CMS) has the inherent properties of carboxyl groups, such as: chelation, ion exchange, flocculation of polyanions Function and acidic function, also has some solution properties, such as: thickening, gelatinization, water absorption, adhesion and film-forming properties, can be widely used in medicine, food, textile, printing and dyeing, papermaking, oil drilling and other fields, It is a modified starch product with great market p...

Claims

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Application Information

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IPC IPC(8): C08B31/12
CPCC08B31/12
Inventor 任思凯李超周忠伟袁美宏任思龙
Owner SHANDONG SHENZHOU XIANGYU TECH GRP
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