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Preparation method of carboxymethylated Semen Cassiae gum reactive dye printing paste

A technology of carboxymethyl cassia and reactive dyes, which is applied in the field of reactive dye printing pastes, can solve the problems of small degree of substitution, poor mesh penetration, and many insolubles in cold water, and achieve improved water solubility, improved mesh permeability, and industrial value. high effect

Inactive Publication Date: 2016-07-13
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are only a few papers introducing the carboxymethylation modification of cassia seed polysaccharides with isobutanol as the dispersion medium. The degree of substitution is small, there are more cold water insolubles, and the permeability is poor.

Method used

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  • Preparation method of carboxymethylated Semen Cassiae gum reactive dye printing paste

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of the carboxymethyl cassia gum reactive dye printing paste of the present embodiment may further comprise the steps:

[0019] (1) Cool 53.3g of sodium hydroxide solution with a mass fraction of 45% (sodium hydroxide 24g, 0.6mol) to room temperature, and add it to 100mL of stirring ethanol (95%) to obtain an ethanol solution of sodium hydroxide, Under stirring, add 50 g of cassia seed rubber powder to the ethanol solution of sodium hydroxide, and alkalize at 28°C for 60 minutes;

[0020] (2) After the alkalization reaction, add chloroacetic acid (29g, 0.3mol), stir well, then raise the temperature to 65°C for etherification reaction for 3.5h;

[0021] (3) After the etherification reaction, lower the temperature to 28°C, adjust the pH of the reaction system to neutral with hydrochloric acid, wash, filter with suction, dry at 80°C, and pulverize to obtain carboxymethyl cassia gum reactive dye printing paste, which replaces The degree is 0.8.

Embodiment 2

[0023] The preparation method of the carboxymethyl cassia gum reactive dye printing paste of the present embodiment may further comprise the steps:

[0024] (1) Cool 88g of sodium hydroxide solution with a mass fraction of 45% (containing 39.6g of sodium hydroxide, 0.99mol) to room temperature, and add it to 125mL of stirring ethanol (95%) to obtain an ethanol solution of sodium hydroxide , under stirring, add 50g of cassia seed rubber powder to the ethanol solution of sodium hydroxide, and alkalize the reaction for 30min at 32°C;

[0025] (2) After the alkalization reaction, add chloroacetic acid (42.5g, 0.45mol), stir well, then raise the temperature to 75°C, and carry out the etherification reaction for 3 hours;

[0026] (3) After the etherification reaction, lower the temperature to 32°C, adjust the pH of the reaction system to neutral with hydrochloric acid, wash, filter with suction, dry at 80°C, and pulverize to obtain carboxymethyl cassia gum reactive dye printing past...

Embodiment 3

[0028] The preparation method of the carboxymethyl cassia gum reactive dye printing paste of the present embodiment may further comprise the steps:

[0029] (1) Cool 74.7g of sodium hydroxide solution with a mass fraction of 45% (containing 33.6g of sodium hydroxide, 0.84mol) to room temperature, and add it to 110mL of stirring ethanol (95%) to obtain ethanol for sodium hydroxide solution, under stirring, add 50g of cassia seed rubber powder to the ethanol solution of sodium hydroxide, and alkalize the reaction for 45min at 30°C;

[0030] (2) After the alkalization reaction, add chloroacetic acid (37.8g, 0.4mol), stir well, then raise the temperature to 70°C, and carry out etherification reaction for 3.2h;

[0031] (3) After the etherification reaction, lower the temperature to 30°C, adjust the pH of the reaction system to neutral with hydrochloric acid, wash, filter with suction, dry at 80°C, and pulverize to obtain carboxymethyl cassia gum reactive dye printing paste, which ...

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Abstract

The invention discloses a preparation method of carboxymethylated Semen Cassiae gum reactive dye printing paste.The preparation method includes adding a dissolved 45% sodium hydroxide solution into an ethanol solvent; under stirring, adding Semen Cassiae gum powder into the ethanol solvent and alkalizing for 60 minutes by controlling the temperature at about 30 DEG C; adding chloroacetic acid after alkalization is terminated, increasing the temperature to etherification temperature of 70-75 DEG C and reacting for 3.5 hours; decreasing the temperature to about 30 DEG C after reaction is terminated, and regulating a pH value to be neutral prior to washing, suction filtration, drying at 80 DEG C and grinding so as to obtain the carboxymethylated Semen Cassiae gum reactive dye printing paste.The carboxymethylated Semen Cassiae gum reactive dye printing paste with degree of substitution being 0.9-1.1 has the advantages of good net permeability, high color yield, high contour sharpness, high paste removal rate, good hand feel and excellent comprehensive printing indexes, is in line with current ecological environment-friendly development trend, and is high in industrial value since Semen Cassiae gum application is also expanded according to research results.

Description

technical field [0001] The invention relates to the technical field of preparation of highly substituted carboxymethyl cassia gum reactive dye printing paste, in particular to a solvent method for preparing highly substituted carboxymethyl cassia gum and using it for reactive dye printing paste. Background technique [0002] Reactive dye printing paste has always been mainly based on sodium alginate paste. With the increase of paste materials, the price of sodium alginate continues to rise. At the same time, excessive mining of seaweed has also caused environmental problems, which prompts us Development of new printing pastes to replace sodium alginate. In recent years, carboxymethyl cellulose, carboxymethyl starch, and carboxymethyl guar gum have been developed according to the structural characteristics of sodium alginate, which relieved the pressure on the demand for sodium alginate to a certain extent, but most of these pastes have applications Defects, carboxymethyl st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/48D06P1/38C08B37/00
CPCC08B37/00D06P1/38D06P1/48
Inventor 武宗文周培文李俊礼曹长青
Owner ZHONGYUAN ENGINEERING COLLEGE
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