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High-substitution-degree quaternary ammonium type cationic sticky rice starch and manufacturing method thereof

A technology of glutinous rice starch and high degree of substitution, which is applied in the field of high substitution degree quaternary ammonium cationic glutinous rice starch and its preparation, which achieves the effects of reasonable production process, expanded application range, and increased paper ash content

Inactive Publication Date: 2013-12-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the common raw materials for preparing cationic starch include corn starch, tapioca starch, wheat starch or potato starch, etc., but the preparation of cationic starch with high substitution degree from glutinous rice starch has not been reported.

Method used

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  • High-substitution-degree quaternary ammonium type cationic sticky rice starch and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Slurry: Add 12ml of 40% ethanol aqueous solution to 50g of glutinous rice starch and mix to form glutinous rice starch slurry.

[0025] (2) Alkalinization: Add 2ml of 40% sodium hydroxide solution dropwise into the glutinous rice starch slurry.

[0026] (3) Etherification: 15g of 2,3-epoxypropyltrimethylammonium chloride was added to the starch, and stirred at room temperature for 60 minutes.

[0027] (4) Soaking, filtering, washing, and drying: Soak the glutinous rice starch slurry after step (3) etherification with 100 mL of 60% ethanol aqueous solution containing 5 mL of acetic acid, filter, and wash with 100 ml of 70% ethanol aqueous solution 5 times, until the filtrate is tested with silver nitrate and there is no precipitation of silver chloride; vacuum-dry at 40°C to obtain a white powdery highly substituted quaternary ammonium cationic starch.

[0028] The degree of substitution of the sample in this embodiment is 0.213, and the infrared spectrum is as foll...

Embodiment 2

[0030] (1) Slurry: Add 14ml of 40% ethanol aqueous solution to 50g of glutinous rice starch and mix to form glutinous rice starch slurry.

[0031] (2) Alkalinization: Add 2ml of 40% potassium hydroxide solution dropwise into the glutinous rice starch slurry.

[0032] (3) Etherification: 18g of 2,3-epoxypropyltrimethylammonium chloride was added to the starch, and stirred at room temperature for 80 minutes.

[0033] (4) Soaking, filtering, washing, and drying: Soak the glutinous rice starch slurry after etherification in step (3) with 100 mL of 65% ethanol aqueous solution containing 5 mL of acetic acid, filter, and wash with 100 ml of 75% ethanol aqueous solution 5 times, until the filtrate is tested with silver nitrate and there is no silver chloride precipitation; vacuum-dry at 45°C to obtain a white powdery highly substituted quaternary ammonium cationic starch.

[0034] The degree of substitution of the sample in this example is 0.272.

Embodiment 3

[0036] (1) Slurry: Add 11ml of 40% ethanol aqueous solution to 50g of glutinous rice starch and mix to form glutinous rice starch slurry.

[0037] (2) Alkalinization: Add 2ml of 40% calcium hydroxide solution dropwise into the glutinous rice starch slurry.

[0038] (3) Etherification: 15 g of 3-chloro-2-hydroxypropyltrimethylammonium chloride was added to the starch, and the reaction was stirred at room temperature for 100 minutes.

[0039] (4) Soaking, filtering, washing, and drying: Soak the glutinous rice starch slurry after etherification in step (3) with 100 mL of 70% ethanol aqueous solution containing 5 mL of acetic acid, filter, and wash with 100 ml of 80% ethanol aqueous solution 5 times, until the filtrate is tested with silver nitrate and there is no silver chloride precipitation; vacuum-dry at 50°C to obtain a white powdery highly substituted quaternary ammonium cationic starch.

[0040] The degree of substitution of the sample in this example is 0.282.

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Abstract

The invention belongs to the technical field of modified starch, and discloses high-substitution-degree quaternary ammonium type cationic sticky rice starch and a manufacturing method thereof. Sticky rice starch and ethanol water solution are mixed to form sticky rice starch slurry; alkaline solution is added in the sticky rice starch slurry at room temperature and the sticky rice starch slurry is stirred; then cationic etherification agent is added in the sticky rice starch slurry to be stirred, and a coarse product is obtained through stirring reaction; the coarse product is soaked in ethanol water solution with acetic acid and is filtered, and is washed by the ethanol water solution until no silver chloride sediment is produced when filter liquor is detected by silver nitrate; then the coarse product is dried in a vacuumized mode, and the high-substitution-degree quaternary ammonium type cationic sticky rice starch in a white powder shape is obtained. According to the high-substitution-degree quaternary ammonium type cationic sticky rice starch and the manufacturing method of the high-substitution-degree quaternary ammonium type cationic sticky rice starch, the sticky rice starch is used as raw materials to be prepared for high-substitution-degree quaternary ammonium type cationic sticky rice starch in a semi-dry method, and the using range of the sticky rice starch is expanded.

Description

technical field [0001] The invention belongs to the technical field of modified starch production, and in particular relates to a high degree of substitution quaternary ammonium cationic glutinous rice starch and a preparation method thereof. Background technique [0002] Cationic starch is a very important starch ether derivative. It is widely used in papermaking, textiles, oilfield development, adhesives, mining and cosmetics industries abroad. However, in China, it is only relatively mature in the papermaking industry, and other fields are waiting to be developed. , so the prospect is very broad. Quaternary ammonium cationic starch is cationic in both acidic and alkaline conditions, and is especially suitable for papermaking under medium, alkaline or acidic conditions. Today, with the rapid development of neutral papermaking technology, it is becoming an indispensable It is also a kind of modified starch with the widest application range and the largest dosage at present...

Claims

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Application Information

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IPC IPC(8): C08B31/12
Inventor 杨仁党刘进华飞果杨飞刘德桃
Owner SOUTH CHINA UNIV OF TECH