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A kind of preparation method of regenerated cellulose color paste

A technology of regenerated cellulose and color paste, applied in the field of textile printing and dyeing, can solve the problem of less regenerated cellulose suspension, achieve good biocompatibility, and expand the application range

Active Publication Date: 2019-01-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the dyeing of cellulose fibers with reactive dyes is relatively common, but there are few domestic reports on the dyeing of regenerated cellulose suspensions with reactive dyes

Method used

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  • A kind of preparation method of regenerated cellulose color paste
  • A kind of preparation method of regenerated cellulose color paste
  • A kind of preparation method of regenerated cellulose color paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) A regenerated cellulose suspension with a concentration of 2 wt% was prepared by the sodium hydroxide / urea method.

[0028] (2) Mix 0.1g reactive red 194 dye, 45g regenerated cellulose suspension obtained in step (1) and 10g water evenly to obtain a red dye solution with a bath ratio of 1:60;

[0029] (3) Add the dye solution obtained in step (2) into a three-necked flask equipped with a heating device, a stirring device, and a reflux condensing device for dyeing, use a 200r / min stirrer to mechanically stir at 25°C for 15min, and then add 30g / L of sodium chloride, continue to stir at 25°C for 15min; then raise the temperature to a color-fixing temperature of 70°C at a heating rate of 1.5°C / min, add 30g / L of sodium carbonate at this time, keep it warm for 60min, Then lower the temperature from 70°C to room temperature to obtain a dyed regenerated cellulose suspension dye liquor;

[0030] (4) Dilute the dyed regenerated cellulose suspension dye solution obtained in ...

Embodiment 2

[0033] (1) 0.1g reactive yellow 145 dyestuff, 45g embodiment 1 step (1) prepare regenerated cellulose suspension and 10g water and mix evenly, obtain the yellow dye liquor that bath ratio is 1:60;

[0034] (2) Add the dye solution obtained in step (1) into a three-necked flask equipped with a heating device, a stirring device, and a reflux condensing device for dyeing, use a 200r / min stirrer to mechanically stir at 25°C for 15min, and then add 30g / L of sodium chloride, continue to stir at 25°C for 15min; then raise the temperature to a color-fixing temperature of 70°C at a heating rate of 1.5°C / min, add 30g / L of sodium carbonate at this time, keep it warm for 60min, Then lower the temperature from 70°C to room temperature to obtain a dyed regenerated cellulose suspension dye liquor;

[0035] (3) Dilute the dyed regenerated cellulose suspension dye solution obtained in step (2) with water and stir evenly, pour it into a centrifuge tube, and perform centrifugation in a centrifu...

Embodiment 3

[0038] (1) 0.1g reactive blue 74 dyestuff, 45g embodiment 1 step (1) prepare regenerated cellulose suspension and 10g water and mix evenly, obtain the blue dye liquor that bath ratio is 1:60;

[0039](2) Add the dye solution obtained in step (1) into a three-necked flask equipped with a heating device, a stirring device, and a reflux condensing device for dyeing, use a 200r / min stirrer to mechanically stir at 60°C for 15min, and then add 30g / L of sodium chloride, continue to stir at 60°C for 15 minutes; then raise the temperature to a color-fixing temperature of 90°C at a heating rate of 1.5°C / min, add 30g / L of sodium carbonate at this time, and keep it warm for 60 minutes to fix the color. Then lower the temperature from 90°C to room temperature to obtain a dyed regenerated cellulose suspension dye liquor;

[0040] (3) Dilute the dyed regenerated cellulose suspension dye solution obtained in step (2) with water and stir evenly, pour it into a centrifuge tube, and perform cen...

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Abstract

The invention relates to a method for preparing regenerated cellulose color paste. The method comprises the following steps: uniformly mixing a reactive dye, a regenerated cellulose suspension and water to obtain dye liquor; performing stirring for dyeing, adding an electrolyte, performing stirring for dyeing continuously, and adding a color fixing alkali agent for fixation to obtain dyed regenerated cellulose suspension dye liquor; adding water to dilute the dyed regenerated cellulose suspension dye liquor, evenly stirring and centrifuging the dye liquor, adding water to dilute underlayer precipitate, adding a soaping agent for soaping, performing cooling and centrifuging, and keeping the underlayer precipitate to obtain the regenerated cellulose color paste. According to the method, different reactive dyes are used for dyeing the regenerated cellulose suspension, so that the regenerated cellulose color paste with rich colors can be obtained; the preparation method adopts a simple process and facilitates industrialization; the obtained regenerated cellulose color paste has good biocompatibility, degradability, dispersion stability and shear thinning performance, and has wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of textile printing and dyeing, in particular to a preparation method of regenerated cellulose color paste. Background technique [0002] Cellulose is one of the most abundant renewable resources in nature. It is green, environmentally friendly, cheap, and easy to obtain. It is the main raw material for future chemical industry and energy. Regenerated cellulose can be prepared by dissolving cellulose in the corresponding solvent and regenerated. Regenerated cellulose has good compatibility, high reactivity and good emulsifying ability, so it can be used to stabilize emulsion and prepare regenerated cellulose film And the preparation of regenerated cellulose composite materials, etc. [0003] Reactive dyes have the characteristics of bright color, complete color spectrum, excellent fastness, and low cost, and can be used for dyeing cellulose fibers, protein fibers, and polyamide fibers. Reactive dyes can re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P1/38D06P3/66
Inventor 隋晓锋丁雷王碧佳毛志平徐红张琳萍钟毅
Owner DONGHUA UNIV