A wrinkle-resistant finishing method for cotton fabric without formaldehyde and without loss of strength

A technology for anti-wrinkle finishing and cotton fabrics, which is applied in the fields of plant fiber, fiber treatment, textiles and papermaking, etc. It can solve the problems of reduced strength and good wrinkle resistance of fabrics, and achieves improved anti-wrinkle effect, less wrinkle resistance, and good washing stability. Effect

Active Publication Date: 2021-03-30
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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Abstract

The invention discloses an anti-wrinkle finishing method for cotton fabrics without formaldehyde and without loss of strength, and belongs to the field of anti-wrinkle finishing of textiles. The invention adopts the lipoic acid analog containing disulfide bond (or mercapto group) and carboxyl group as the anti-wrinkle finishing agent of cotton fabric, and establishes a method for anti-wrinkle finishing of cotton fabric without formaldehyde and loss of strength. First, the cotton fabric after scouring and bleaching is immersed in the dimethyl sulfoxide solution of the lipoic acid analogue, and the esterification reaction is completed under the action of a dehydrating agent and a catalyst; the disulfide bond in the lipoic acid analogue is reduced by a reducing agent into two mercapto groups, and finally oxidized to a disulfide bond under a certain tension to form a covalent cross-linked structure to obtain a durable wrinkle-resistant cotton fabric. The cotton fabric after finishing is strong without damage, has excellent wrinkle resistance and good washing stability. Since the molecular structure of lipoic acid analogs does not contain formaldehyde, there will be no problems such as formaldehyde release during processing or consumption, ensuring the safety of wrinkle-resistant cotton fabrics.

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

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Application Information

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Patent Type & Authority Patents(China)
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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