Covalent bond tinting method applicable to silks

A covalent bond and silk technology, applied in dyeing, textile and papermaking, etc., can solve the problems of difficulty in dark color and single coupling components, and achieve the effects of small damage, low development cost and complete chromatogram.

Active Publication Date: 2014-04-23
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is difficult to obtain dark colors due to the single coupling component, so it is only suitable for the coloring of light-colored silk fibers such as yellow, orange, and red.

Method used

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  • Covalent bond tinting method applicable to silks
  • Covalent bond tinting method applicable to silks
  • Covalent bond tinting method applicable to silks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, a kind of covalent bond coloring method that is applicable to silk, selects the dyestuff that contains primary aromatic amine group as yellow dyestuff, and its structural formula is as follows:

[0032]

[0033] Formaldehyde is specifically selected as the aldehyde substance.

[0034] The coloring method is as follows:

[0035] Add 5g (0.0134mol) of dye and 0.0134mol of formaldehyde to 1000g of mulberry silk fabric; the dyeing bath ratio is 1:50; the pH value of the dyeing bath is 6.5 (use acetic acid-sodium acetate buffer solution to adjust the above pH value, this It is a conventional technique), the dyeing temperature is 40°C, and the holding time is 20 hours.

[0036] After dyeing, it is washed with deionized water at 60°C and 15°C to remove impurities adsorbed on the silk (just wash the floating color of the dye and formaldehyde from the silk), and then dry it in the air (until it reaches constant weight at room temperature) .

[0037] It is mea...

Embodiment 2

[0038] Embodiment 2, a kind of covalent bond coloring method that is applicable to silk, selects the dyestuff that contains primary aromatic amine group as red dyestuff, and its structural formula is as follows:

[0039]

[0040] The aldehyde substance is specifically selected from acetaldehyde.

[0041] The coloring method is as follows:

[0042] Add 30g (0.07mol) of dye and 0.14mol of acetaldehyde to 1000g of mulberry silk fabric; the dyeing bath ratio is 1:100; the pH value of the dyeing bath is 4.0, the dyeing temperature is 30°C, and the holding time is 24 hours.

[0043] After the dyeing is finished, it is washed with deionized water at 60°C and 15°C to remove impurities adsorbed on the silk, and dried in the air.

[0044] It is measured that the maximum absorption wavelength of the dye (water soluble) is 530nm, and the maximum absorption wavelength after dyeing the fabric is 540nm. The silk after the method described in Example 2 is processed according to the nation...

Embodiment 3

[0045] Embodiment 3, a kind of covalent bond coloring method that is applicable to silk, selects the dyestuff containing primary aramide group as blue dyestuff, and its structural formula is as follows:

[0046]

[0047] The aldehyde substance is specifically selected from propionaldehyde.

[0048] The coloring method is as follows:

[0049]Add 20g (0.049mol) of dye and 0.07mol of propionaldehyde to 1000g of pressed silk fabric; the dyeing bath ratio is 1:20; the pH value of the dyeing bath is 6.0, the dyeing temperature is 70°C, and the holding time is 0.5 hours.

[0050] After the dyeing is finished, it is washed with deionized water at 60°C and 15°C to remove impurities adsorbed on the silk, and dried in the air.

[0051] It is measured that the maximum absorption wavelength of the dye (water soluble) is 628nm, and the maximum absorption wavelength after dyeing the fabric is 630nm. The silk after the method described in Example 3 is processed according to the national s...

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Abstract

The invention discloses a covalent bond tinting method applicable to silks. The covalent bond tinting method comprises the following steps: carrying out a Mannich reaction on tyrosine residues in the silks by a dye containing aromatic primary amine radicals in the presence of aldehydes materials, wherein a mass ratio of the dye containing the aromatic primary amine radicals to the silks is (0.005-0.03) to 1; a mol ratio of the dye containing the aromatic primary amine radicals to the aldehydes materials is 1 to (1-2); a dye bath ratio of the dye containing the aromatic primary amine radicals to the aldehydes materials is 1 to (20-100); a dye bath pH (Potential of Hydrogen) value keeps within a range of 4.0-6.5; a dyeing temperature is 30-70 DEG C; the heat preservation time is 0.5-24h; after dyeing, washing a product with hot water and cool water, so as to remove impurities adsorbed on the silks; and finally, drying. The method has the advantages of moderate dyeing conditions, energy conversation and environmental friendliness; the problem of fastness in wet-resistant treatment of the fibers of the silks can be foundationally solved.

Description

technical field [0001] The invention relates to a covalent bond coloring method suitable for silk. Background technique [0002] Silk fiber has the problem of poor dyeing fastness, and the existing dyeing methods suitable for silk fiber have their own deficiencies. Synthetic dyes currently used for silk dyeing mainly include acid dyes, metal complex dyes and reactive dyes. Although acid dyes have bright color, complete chromatograms and high dye uptake, they are combined with silk fibers through ionic bonds and are easily affected by the solvation of water. Usually, the fastness to wet treatment is not good. Metal complex dyes form complexes on fibers with the help of metal (chromium, cobalt) ions, and have good fastness to wet treatment. However, a large amount of metal ions remaining in fibers and dyeing solutions will cause negative effects on human health and the environment. There are reactive groups in the reactive dye structure, which can react with the amino group ...

Claims

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Application Information

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IPC IPC(8): D06P1/39D06P1/651D06P3/04
Inventor 崔志华李鑫范素菊程晓红陈维国
Owner ZHEJIANG SCI-TECH UNIV
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