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Quaternary ammonium salt cationic starch and preparation method thereof

A quaternary ammonium salt cation and starch technology, which is applied in the field of quaternary ammonium salt cationic starch and its preparation, can solve the problems of limited application field, limited degree of substitution, single variety, etc., and achieves controllable degree of substitution, simple method and excellent antibacterial performance. Effect

Inactive Publication Date: 2019-04-05
HENAN HUALI PAPER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current quaternary ammonium salt cationic starch is mainly prepared by etherification method, its variety is relatively single, and its degree of substitution is limited, so its application field is greatly restricted.

Method used

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  • Quaternary ammonium salt cationic starch and preparation method thereof
  • Quaternary ammonium salt cationic starch and preparation method thereof
  • Quaternary ammonium salt cationic starch and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The preparation method of quaternary ammonium salt cationic starch of the present invention, the detailed steps of this preparation method are as follows:

[0040] a, first add 48.6g cornstarch and 100mL N,N-dimethylformamide solvent to the 250mL four-necked flask of the reaction vessel and stir (the whole process will keep the good stirring state that the materials are evenly mixed), heating, when the temperature Raise to 80°C, add 16.9g of 4-chlorobutyryl chloride dropwise, and finish dropping in 5 minutes. After dropping, keep the temperature of the reaction system at 80°C, and the reaction time under this temperature condition is 4h;

[0041] b. Then add 14.5g of triethylamine dropwise and finish dropping in 2 minutes. Control the temperature of the reaction system to be 80°C and the reaction time to be 6h;

[0042]c. After the reaction, the obtained reaction mixture was precipitated in ethanol, filtered with suction after the precipitation, washed twice with ethano...

Embodiment 2

[0046] The preparation method of quaternary ammonium salt cationic starch of the present invention, the detailed steps of this preparation method are as follows:

[0047] a, first add 50.0g tapioca starch and 100mL N,N-dimethylformamide solvent to the reaction vessel 250mL four-necked flask and stir (the whole process will keep the good stirring state of the uniform mixing of materials), heating, when the temperature Raise to 80°C, add 14.1g of 4-chlorobutyryl chloride dropwise, and finish dropping in 5 minutes. After dropping, keep the temperature of the reaction system at 80°C, and the reaction time under this temperature condition is 4h;

[0048] b. Then add 12.1 g of triethylamine dropwise, and finish dropping in 2 minutes. Control the temperature of the reaction system at 80° C., and the reaction time is 8 hours;

[0049] c. After the reaction, the obtained reaction mixture was precipitated in ethanol, filtered with suction after the precipitation, washed twice with ethan...

Embodiment 3

[0053] The preparation method of quaternary ammonium salt cationic starch of the present invention, the detailed steps of this preparation method are as follows:

[0054] a, first add 50.0g sweet potato starch and 100mL N,N-dimethylformamide solvent to the 250mL four-necked flask of the reaction vessel and stir (the whole process will keep the good stirring state that the materials are evenly mixed), heating, when the temperature Raise to 70°C, add 11.2g of chloroacetyl chloride dropwise, and finish dropping in 5 minutes. After dropping, keep the temperature of the reaction system at 70°C, and the reaction time under this temperature condition is 6h;

[0055] b. Then add 17.4g of octyl dimethyl tertiary amine dropwise, and finish dropping in 2 minutes. The temperature of the reaction system is controlled at 100° C., and the reaction time is 8 hours;

[0056] c. After the reaction, the resulting reaction mixture was precipitated in methanol, filtered with suction after the prec...

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Abstract

The invention discloses quaternary ammonium salt cationic starch and a preparation method thereof. The preparation method includes the steps: firstly, adding the starch and solvents into a reaction vessel, stirring, mixing and heating mixture, dripping halogenated acyl halide monomers, and heating mixture to perform esterification reaction; secondly, adding tertiary amine after reaction, and heating mixture to perform quaternarization; finally, precipitating reaction mixture in a precipitating agent after reaction, sequentially performing extraction filtration, washing and drying to obtain thequaternary ammonium salt cationic starch. The preparation method for preparing the quaternary ammonium salt cationic starch is simple and convenient to operate and controllable in substitution degree, various types of quaternary ammonium salt cationic starch can be prepared, the types of the cationic starch are enriched, the application range of the quaternary ammonium salt cationic starch is widened, and the cationic starch has wide application prospects.

Description

1. Technical field: [0001] The invention relates to a modified starch material, in particular to a quaternary ammonium cationic starch and a preparation method thereof. 2. Background technology: [0002] Starch is rich in resources, low in price, and good in degradability. It is a natural green and clean raw material. Starch and its deep-processed products are widely used in food, textile, mining, decontamination, papermaking and foundry industries. Due to the defects of poor water solubility, unstable paste liquid, easy aging, poor freeze-thaw stability, low gelling force, poor film-forming performance, low mechanical strength resistance, weak water resistance, and poor emulsifying properties of natural starch, it is therefore Greatly reduced the scope of application of starch in the chemical industry. In order to improve the performance of starch and expand the scope of application, researchers use physical, chemical or enzymatic treatment to change the natural propertie...

Claims

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Application Information

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IPC IPC(8): C08B31/04
CPCC08B31/04
Inventor 王毛力代建设刘友平邱俊平张国强王经武
Owner HENAN HUALI PAPER IND
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