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Solution type corn cationic starch and preparation method thereof

A technology of cationic starch and corn starch, which is applied in the field of starch denaturation, can solve the problems of relatively high equipment and process requirements, residual impurity content of reagents, high reaction efficiency of semi-dry method, etc., and achieve uniform reaction, less reagent residue and good retention effect Effect

Inactive Publication Date: 2020-12-04
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The semi-dry method has a high reaction efficiency of more than 92%, and can prepare cationic starch with a degree of substitution greater than 0.05. The disadvantage is that the product has many impurities and uneven reaction, most of which only occur on the surface of starch granules, which affects the use effect.
The dry method can prepare DS>0.1, more in the range of 0.1-1.0, but there are also problems of reagent residue and high impurity content, and the requirements for equipment and technology are relatively high

Method used

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  • Solution type corn cationic starch and preparation method thereof

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Effect test

Embodiment 1

[0031] The present embodiment provides a kind of solution type corn cationic starch and preparation method thereof, and specific preparation method comprises the following steps:

[0032] Step 1: Add cornstarch and deionized water into a four-port fired glass reactor and keep stirring, then add an appropriate amount of NaCl into it at a stirring speed of 450r / min, stir evenly and divide into two parts.

[0033] Step 2: Warm up the two solutions to 60°C, add ammonium persulfate as a shearing agent and initiator to one of them, and then add a certain amount of NaOH solution as a catalyst to make it react in an alkaline environment for 1 hour, record Make E1; add only NaOH solution with the same volume as E1 to another solution, and react for 1 hour in the same way, and record it as E2.

[0034] Step 3, add an appropriate amount of sodium sulfite to E1, remove excess ammonium persulfate, and record it as E3; then add E3 to E2 and mix well, and the mixed solution is recorded as E4...

Embodiment 2

[0048] The present embodiment provides a kind of solution type corn cationic starch and preparation method thereof, and specific preparation method comprises the following steps:

[0049] Step 1: Add cornstarch and deionized water into a four-port fired glass reactor and keep stirring, add an appropriate amount of NaCl into it, stir at a speed of 450r / min, stir evenly and divide into two parts.

[0050] Step 2: Warm up the two solutions to 60°C, add sodium hypochlorite as a shearing agent and initiator to one of them, and then add a certain amount of NaOH solution as a catalyst to make it react in an alkaline environment for 1 hour, denoted as E1 ; To another solution, only add the same volume of NaOH solution as E1, also react for 1h, denoted as E2. Add an appropriate amount of sodium bisulfite to E1, remove the excess sodium hypochlorite, and record it as E3; then add E3 to E2 and mix well, and the mixed solution is recorded as E4; then add an appropriate amount of epichloro...

Embodiment 3

[0064] The present embodiment provides a kind of solution type corn cationic starch and preparation method thereof, and specific preparation method comprises the following steps:

[0065] Step 1: Add cornstarch and deionized water into a four-port fired glass reactor and keep stirring, add an appropriate amount of NaCl into it, stir at a speed of 450r / min, stir evenly and divide into two parts.

[0066] Step 2: Warm up the two solutions to 60°C, add sodium hypochlorite as a shearing agent and initiator to one of them, and then add a certain amount of NaOH solution as a catalyst to make it react in an alkaline environment for 1 hour, denoted as E1 ; To another solution, only add the same volume of NaOH solution as E1, also react for 1h, denoted as E2. Step 3, add an appropriate amount of sodium bisulfite to E1, remove excess sodium hypochlorite, and record it as E3; then add E3 to E2 and mix evenly, and the mixed solution is recorded as E4; then add an appropriate amount of cyc...

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Abstract

The invention provides a solution type corn cationic starch and a preparation method thereof, the preparation method comprises the following steps: (1) dissolving corn starch, and dividing an obtainedsolution into two parts; (2) adding a strong oxidant and liquid caustic soda into the first part of solution, and adding liquid caustic soda with the same volume into the second part of solution; (3)removing the oxidant in the first part of solution, mixing the two parts of solutions, and adding a cross-linking agent; (4) carrying out etherification reaction; and (5) adjusting the pH value, sterilizing and sieving to obtain the solution type corn cationic starch. The preparation method of the solution type corn cationic starch provided by the invention has the advantages of lower requirements on equipment and process, lower production cost, uniform reaction in the process of producing the solution type corn cationic starch, less reagent residue and better quality of the produced product,and is more suitable for industrial production compared with ionic starch sold on the market. And a good retention effect is achieved.

Description

technical field [0001] The invention relates to the technical field of starch denaturation, in particular to a solution-type corn cationic starch and a preparation method thereof. Background technique [0002] Starch is a polysaccharide natural polymer compound formed by the condensation of α-D-glucopyranose. It is a renewable substance with the most abundant sources in nature. It can be degraded and will not pollute the environment. There are a large number of reactive hydroxyl groups in its molecular chain, which provides a structural basis for the modification of starch. Modified starch is based on the inherent characteristics of natural starch. In order to improve the performance of starch and expand its application range, physical, chemical or enzymatic treatment is used to introduce new functional groups on starch molecules or change the size and size of starch molecules. The properties of starch granules, thereby changing the natural characteristics of starch, making...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/18C08B31/12
CPCC08B31/125C08B31/185
Inventor 施晓旦沈安成尹东华
Owner SHANGHAI DONGSHENG NEW MATERIALS
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