Unlock instant, AI-driven research and patent intelligence for your innovation.

Covalent Bond Coloring Method Applicable to Silk

A covalent bond and silk technology, applied in dyeing, textiles and papermaking, etc., can solve the problems of single coupling component and difficulty in dark color, and achieve the effect of low development cost, small damage and high fastness to wet treatment

Active Publication Date: 2015-11-11
ZHEJIANG SCI-TECH UNIV
View PDF3 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Covalent Bond Coloring Method Applicable to Silk
  • Covalent Bond Coloring Method Applicable to Silk
  • Covalent Bond Coloring Method Applicable to Silk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1. A covalent bond coloring method suitable for silk, selecting a yellow dye containing a primary aromatic amine group as a yellow dye, 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; dye bath ratio is 1:50; dye bath pH value 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℃, 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 (wash the dye floating and formaldehyde from the silk), and dry it (air to constant weight at room temperature) .

[0037] The measured maximum absorption wavelength of the dye (dissolved in water) is 448nm, and the maximum absorption...

Embodiment 2

[0038] Example 2. A covalent bond coloring method suitable for silk, selecting a dye containing primary aromatic amine groups as a red dye, and its structural formula is as follows:

[0039]

[0040] Acetaldehyde is specifically selected for aldehydes.

[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 dyeing bath pH is 4.0, the dyeing temperature is 30°C, and the holding time is 24 hours.

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

[0044] The measured maximum absorption wavelength of the dye (dissolved in water) is 530nm, and the maximum absorption wavelength after dyeing the fabric is 540nm. The silk treated by the method described in Example 2 is in accordance with the national standard "Color fastness to washing GB / T3921-2008" And the national standard "Test for color fastne...

Embodiment 3

[0045] Example 3. A covalent bond coloring method suitable for silk, selecting a blue dye containing a primary aromatic amine group as a blue dye, and its structural formula is as follows:

[0046]

[0047] Propionaldehyde is specifically selected as the aldehyde substance.

[0048] The coloring method is as follows:

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

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

[0051] The measured maximum absorption wavelength of the dye (dissolved in water) is 628nm, and the maximum absorption wavelength after dyeing the fabric is 630nm. The silk treated by the method described in Example 3 is in accordance with the national standard "Color fastness to washing GB / T3921-2008" And the national stand...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
color fastnessaaaaaaaaaa
color fastnessaaaaaaaaaa
color fastnessaaaaaaaaaa
Login to View More

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 dye fastness, and the existing dyeing methods suitable for silk fiber have their own shortcomings. The synthetic dyes currently used in silk dyeing mainly include acid dyes, metal complex dyes and reactive dyes. Although acid dyes have bright colors, complete chromatograms, and high dye uptake, they are combined with silk fibers through ionic bonding and are easily affected by the solvation of water, and usually have poor fastness to moisture treatment. Metal complex dyes use the action of metal (chromium, cobalt) ions to form complexes on the fiber, which has good wet fastness, but a large amount of metal ion residues in the fiber and dye solution will have a negative impact on human health and the environment. The reactive dyes have reactive groups in the structure, which can react with the amino groups at the ends...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
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