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Formaldehyde-free and strength loss-free crease-resistant finishing method for cotton fabrics

A technology for anti-wrinkle finishing and cotton fabrics, which is applied in fiber treatment, plant fiber, textiles and papermaking, etc. It can solve the problems of good wrinkle resistance and strength reduction of fabrics, and achieve the advantages of not easy to wrinkle, improved anti-wrinkle effect, and good washing stability Effect

Active Publication Date: 2020-05-19
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problem that the existing cotton products have good wrinkle resistance but the strength is generally seriously reduced after anti-wrinkle finishing

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
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] First prepare the α-lipoic acid solution with a concentration of 50g / L, add 50g / L α-lipoic acid, 50g / L N-N'-dicyclohexylcarbodiimide and 30g / L 4 - Dimethylaminopyridine. Shake at 30°C for 30min, then soak the cotton fabric in the solution with a bath ratio of 1:50, shake for 24h, and the temperature is 30°C. After the grafting was completed, it was washed with water, then ultrasonically cleaned in absolute ethanol for 30 minutes, washed with water, and dried to obtain a cotton fabric grafted with α-lipoic acid.

[0033]Put the cotton fabric grafted with lipoic acid into 0.5mol / L sodium borohydride solution with a bath ratio of 1:80, shake it at room temperature for 0.5h, wash it with water after the reduction is completed, apply tension to the cotton fabric and fix it at 160°C Bake at the bottom for 3 minutes to eliminate wrinkles in the finishing process, and then oxidize with constant tension for 6 hours. The disulfide bonds of lipoic acid on the cotton fabric are c...

Embodiment 2

[0036] First prepare the α-lipoic acid solution with a concentration of 100g / L, add 100g / L α-lipoic acid, 100g / L N-N'-dicyclohexylcarbodiimide and 60g / L 4 - Dimethylaminopyridine. Shake at 30°C for 30min, then soak the cotton fabric in the solution with a bath ratio of 1:50, shake for 24h, and the temperature is 30°C. After the grafting was completed, it was washed with water, then ultrasonically cleaned in absolute ethanol for 30 minutes, washed with water, and dried to obtain a cotton fabric grafted with α-lipoic acid.

[0037] Put the cotton fabric grafted with lipoic acid into 0.5mol / L sodium borohydride solution with a bath ratio of 1:80, shake it at room temperature for 0.5h, wash it with water after the reduction is completed, apply tension to the cotton fabric and fix it at 160°C Bake at the bottom for 3 minutes to eliminate wrinkles in the finishing process, and then oxidize with constant tension for 6 hours. The disulfide bonds of lipoic acid on the cotton fabric a...

Embodiment 3

[0041] First prepare the α-lipoic acid solution that concentration is 150g / L, add 150g / L α-lipoic acid, 150g / L N-N'-dicyclohexylcarbodiimide and 90g / L 4 successively in dimethyl sulfoxide - Dimethylaminopyridine. Shake at 30°C for 30min, then soak the cotton fabric in the solution with a bath ratio of 1:50, shake for 24h, and the temperature is 30°C. After the grafting was completed, it was washed with water, then ultrasonically cleaned in absolute ethanol for 30 minutes, washed with water, and dried to obtain a cotton fabric grafted with α-lipoic acid.

[0042] Put the cotton fabric grafted with lipoic acid into 0.5mol / L sodium borohydride solution with a bath ratio of 1:80, shake it at room temperature for 0.5h, wash it with water after the reduction is completed, apply tension to the cotton fabric and fix it at 160°C Bake at the bottom for 3 minutes to eliminate wrinkles in the finishing process, and then oxidize with constant tension for 6 hours. The disulfide bonds of l...

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PUM

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Abstract

The invention discloses a formaldehyde-free and strength loss-free crease-resistant finishing method for cotton fabrics, and belongs to the field of crease-resistant finishing of textiles. A lipoic acid analogue containing disulfide bonds (or sulfydryl) and carboxyl simultaneously is used as a crease-resistant finishing agent for cotton fabrics, and a formaldehyde-free and strength loss-free crease-resistant finishing method for cotton fabrics is established. The method comprises the steps of firstly dipping scoured and bleached cotton fabrics in a dimethyl sulfoxide solution of the lipoic acid analogue, and completing an esterification reaction under the action of a dehydrating agent and a catalyst; and reducing a disulfide bond in the lipoic acid analogue into two sulfydryl groups by using a reducing agent, and finally oxidizing the sulfydryl groups into a disulfide bond under a certain tension to form a covalent cross-linked structure so as to obtain the durable anti-wrinkle cottonfabrics. The finished cotton fabrics are strong, free of damage, excellent in crease resistance and good in washable stability. The molecular structure of the lipoic acid analogue does not contain formaldehyde, so that the problems of formaldehyde release and the like do not exist in the processing process or taking process, and the safety of the anti-wrinkle cotton fabrics is ensured.

Description

technical field [0001] The invention relates to a wrinkle-resistant finishing method for cotton fabrics without formaldehyde and loss of strength, and belongs to the field of wrinkle-resistant finishing of textiles. Background technique [0002] Cotton fabrics are favored by everyone because of their soft material, comfortable wearing, good air permeability, and excellent dyeing performance. It brings a lot of inconvenience, so cotton fabrics often have the link of anti-wrinkle finishing when they are processed. The reason for the wrinkling of cotton fabrics is that the cellulose is connected by hydrogen bonds rather than covalent bonds. When cotton fabrics are processed or washed, hydrogen bonds are easily broken and new hydrogen bonds are formed in new positions, so wrinkles occur . Researchers have done a lot of research on anti-wrinkle finishing. In 1926, people began to treat cotton fabrics with urea-formaldehyde or phenolic pre-shrinks to obtain anti-wrinkle effects...

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
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Application Information

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IPC IPC(8): D06M13/248D06M11/80D06M101/06
CPCD06M11/80D06M13/248D06M2101/06D06M2200/20
Inventor 王强黄聪余圆圆王平范雪荣
Owner JIANGNAN UNIV
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