Preparation method of regenerated chitin color pastes

A chitin and plain color technology, applied in the field of preparation of regenerated chitin color paste, can solve problems such as few reports, and achieve the effects of excellent emulsifying ability, good viscoelastic performance and easy production

Inactive Publication Date: 2020-08-25
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most researches on dyeing with reactive dyes focus on the coloring of fibers or fabrics, and there are also studies on the dyeing of regenerated cellulose suspensions. However, there are few domestic reports on the use of reactive dyes to dye regenerated chitin to prepare regenerated chitin colorants

Method used

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  • Preparation method of regenerated chitin color pastes
  • Preparation method of regenerated chitin color pastes
  • Preparation method of regenerated chitin color pastes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Add chitin (derived from shrimp shells) to 35% sodium hydroxide solution and react at 60°C for 1 hour to obtain partially deacetylated chitin, and then use phosphoric acid to dissolve and regenerate partially deacetylated chitin to obtain The deacetylated regenerated chitin suspension, the deacetylation degree of the regenerated chitin is 8% after testing.

[0033] (2) the regenerated chitin suspension of step (1) and reactive red 194 dyes are mixed and stirred to obtain red initial dye liquor, wherein the concentration of regenerated chitin in the initial dye liquor is 5g / L and reactive red 194 dyestuffs The concentration in the initial dyeing solution was 2g / L, and then dyed at 25°C for 30min.

[0034] (3) The dyeing solution in step (2) is raised from 25°C to 70°C at a temperature increase rate of 2°C / min, then add color-fixing alkali agent sodium carbonate (30g / L), and fix the color at 70°C for 60min, then The temperature was lowered to room temperature, and th...

Embodiment 2

[0038] (1) Add chitin (derived from shrimp shells) to 35% sodium hydroxide solution and react at 60°C for 5 hours to obtain partially deacetylated chitin, and then use phosphoric acid to dissolve and regenerate partially deacetylated chitin to obtain The deacetylated regenerated chitin suspension, the deacetylation degree of the regenerated chitin is 25% after testing.

[0039] (2) the regenerated chitin suspension of step (1) and reactive red 194 dyes are mixed and stirred to obtain red initial dye liquor, wherein the concentration of regenerated chitin in the initial dye liquor is 10g / L and reactive red 194 dyestuffs The concentration in the initial dye solution was 5g / L, and then dyed at 30°C for 20min.

[0040] (3) Raise the dye solution in step (2) from 30°C to 65°C at a heating rate of 1.5°C / min, then add the color-fixing alkali agent sodium bicarbonate (20g / L), and fix the color at 65°C for 45min, Then the temperature was lowered to room temperature, and the crude prod...

Embodiment 3

[0044] (1) Add chitin (derived from shrimp shells) to 35% sodium hydroxide solution and react at 90°C for 5 hours to obtain partially deacetylated chitin, and then use phosphoric acid to dissolve and regenerate partially deacetylated chitin to obtain The deacetylated regenerated chitin suspension has a deacetylation degree of 39% after testing.

[0045] (2) the regenerated chitin suspension of step (1) and reactive red 194 dyes are mixed and stirred to obtain red initial dye liquor, wherein the concentration of regenerated chitin in the initial dye liquor is 15g / L and reactive red 194 dyestuffs The concentration in the initial dye solution was 10g / L, and then dyed at 25°C for 15min.

[0046] (3) The dyeing solution in step (2) is raised from 25°C to 75°C at a rate of 2°C / min, and then the color-fixing alkali agent sodium carbonate (25g / L) is added, and the color is fixed for 90min at 75°C, and then The temperature was lowered to room temperature, and the crude product of red ...

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Abstract

The invention relates to a preparation method of regenerated chitin color pastes. The method includes the steps of mixing regenerated chitin suspensions with different deacetylation degrees with reactive dyes, dyeing obtained mixed solutions to obtain dye liquors, adding a fixation alkali agent for color fixation, performing cooling, adding water to obtained dyed regenerated chitin suspensions fordilution, performing filtration, and then dispersing colored regenerated chitin in water. According to the method, the reactive dyes are used for performing colorization modification on the regenerated chitin, and by regulating and controlling the types of the dyes and the deacetylation degrees of the regenerated chitin, the regenerated chitin color pastes with different colors and color depths can be obtained; and the obtained regenerated chitin color pastes inherit the characteristics of the regenerated chitin.

Description

technical field [0001] The invention belongs to the technical field of textile printing and dyeing, in particular to a preparation method of regenerated chitin color paste. Background technique [0002] Chitin is the second largest natural polymer material in nature after cellulose reserves. It has good biocompatibility and biodegradability, and it is widely derived from the shells of arthropods (such as shrimps, crabs, etc.). Its development and application are paid more and more attention. Chitin contains a large number of acetylamino and hydroxyl functional groups, among which the amino group with good reactivity can be obtained after deacetylation of the acetylamino group. The presence of amino group and hydroxyl endows chitin with good chemical reactivity, which is the high additional Value utilization creates conditions. Chitin can be prepared through a dissolution regeneration process to obtain regenerated chitin, and the obtained regenerated chitin has a larger amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/38D06P1/48D06P5/10C08B37/08
CPCD06P1/38D06P1/48D06P5/10C08B37/003
Inventor 隋晓锋丁雷王碧佳冯雪凌毛志平徐红
Owner DONGHUA UNIV
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