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Natural dyestuff dyeing method for cellulosic fiber fabric

A technology of cellulose fibers and natural dyes, applied in the field of textile dyeing and finishing, can solve problems such as no similar reports, and achieve the effects of easy availability of raw materials, reduction of waste, and improvement of bonding fastness.

Active Publication Date: 2017-06-23
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are only a small amount of gelatin protein used in the report of textile finishing. The collagen finishing solution is prepared from tanning leftovers, used for pretreatment of cellulose fibers, and then dyed with natural dyes. There is no similar report on this method.

Method used

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  • Natural dyestuff dyeing method for cellulosic fiber fabric
  • Natural dyestuff dyeing method for cellulosic fiber fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Preparation of collagen hydrolyzate: Accurately weigh a certain amount of chrome-tanned leather leftovers, add it to a mass fraction of 10% NaOH solution, the ratio of chrome-tanned leather leftovers to NaOH solution mass is 1:8, Then hydrolyze at 80°C for 3 hours; after the hydrolysis is completed, filter to obtain a yellow viscous liquid that is collagen hydrolyzate, use glacial acetic acid to adjust the pH value of the hydrolyzate to neutral, and set aside;

[0021] (2) Cellulosic fiber fabric pretreatment: Accurately measure 100mL of the above collagen hydrolyzate, immerse the cotton fabric in the collagen hydrolyzate, dip twice and roll twice, the excess rate is 80%, pre-baked at 60°C for 10 minutes, and then soaked In a diisocyanate ethanol solution with a mass ratio of hexamethylene diisocyanate to absolute ethanol of 0.2:50, the crosslinking reaction time is 24 hours at 20°C. After the reaction, wash with water three times, dry at 80°C, and set aside;

[002...

Embodiment 2

[0030] (1) Preparation of collagen hydrolyzate: Accurately weigh a certain amount of aluminum tanned leather leftovers, add it into a 20% NaOH solution with a mass fraction, the ratio of aluminum tanned leather leftovers to NaOH solution mass is 1:16, Then hydrolyze at 100°C for 1 hour; after the hydrolysis is completed, filter to obtain a yellow viscous liquid, namely collagen hydrolyzate, use glacial acetic acid to adjust the pH value of the hydrolyzate to neutral, and set aside;

[0031] (2) Pretreatment of cellulose fiber fabric: accurately measure 100mL of the above-mentioned collagen hydrolyzate, immerse the hemp fabric in the collagen hydrolyzate, dip twice and roll twice, the excess rate is 90%, pre-baked at 75°C for 5 minutes, and then soaked In a diisocyanate ethanol solution with a mass ratio of p-phenylene diisocyanate to absolute ethanol of 0.6:50, the crosslinking reaction time is 12 hours at 50°C. After the reaction is completed, wash 5 times with water, dry at 8...

Embodiment 3

[0036] (1) Preparation of collagen hydrolyzate: accurately take a certain amount of iron-tanned leather leftovers, add it to a mass fraction of 15% NaOH solution, the ratio of iron-tanned leather leftovers to NaOH solution mass is 1:10, Then hydrolyze at 90°C for 2 hours; after the hydrolysis, filter to obtain a yellow viscous liquid that is collagen hydrolyzate, use glacial acetic acid to adjust the pH value of the hydrolyzate to neutral, and set aside;

[0037] (2) Cellulosic fiber fabric pretreatment: Accurately measure 100mL of the above-mentioned collagen hydrolyzate, immerse the viscose fabric in the collagen hydrolyzate, dip twice and roll twice, with a surplus rate of 85%, pre-baking at 65°C for 8 minutes, and then Soak in toluene-2,4-diisocyanate and absolute ethanol with a mass ratio of 0.4:50 diisocyanate ethanol solution, cross-linking reaction time at 40°C for 18h, after the reaction, wash 4 times with water, and dry at 82°C ,spare;

[0038] (3) Dyeing with natur...

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Abstract

The invention provides a natural dyestuff dyeing method for a cellulosic fiber fabric. The method comprises the steps: inorganic tanning leftover is chosen to perform alkali hydrolysis to prepare collagen hydrolysate which is applied to finishing cellulosic fiber fabric, then the finished fabric is dyed through natural dyestuff, and a residual inorganic metal salt tanning agent in the collagen hydrolysate has a mordant effect in a natural dyestuff dyeing process; a diisocyanate cross-linking agent improves binding strength of collagen and the cellulosic fiber fabric. Compared with an unfinished cellulosic fiber fabric, nautral dyestuff dyeing performance of the cellulosic fiber fabric which is finished by collagen hydrolysate is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of textile dyeing and finishing, in particular to a method for dyeing cellulose fiber fabrics with natural dyes. Background technique [0002] Natural dyes come from nature, and the textiles dyed with them are soft and natural in color, fresh and elegant in taste, and most of the plants used to extract dyes are Chinese herbal medicines, which make textiles dyed with natural dyes have certain antibacterial properties. Therefore, textiles dyed with natural dyes It is loved by more and more people. Generally, natural dyes have better dyeability to protein fibers such as silk and wool. Due to the single reaction group on cellulose fibers, the dyeing performance of natural dyes to cellulose fiber fabrics is generally poor, and some modification treatments are usually required. . [0003] my country is a big country in tanning, and a large amount of tanning leftovers are produced in the leather production proces...

Claims

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Application Information

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IPC IPC(8): D06P1/34D06P1/46D06P1/642D06P1/673D06P3/60
CPCD06P1/34D06P1/46D06P1/6424D06P1/67333D06P3/60
Inventor 彭勇刚汪媛纪俊玲陶永新
Owner CHANGZHOU UNIV
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