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Method for swelling combed ramie fibers

A hemp fiber and combing technology is applied in the field of swollen ramie combed hemp fiber, which can solve the problems of aggravating the environmental pollution treatment of the printing and dyeing industry, dull and dark colors, and difficulty in dyeing dyes, so as to improve the adsorption rate and the dyeing rate, reduce the Environmental pollution, the effect of environmental protection

Inactive Publication Date: 2011-05-25
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, problems such as low dye uptake of ramie fiber limit the development of this type of product.
[0003] Ramie fiber has high crystallinity and orientation, and tight molecular structure, which affects the penetration ability of dyes, makes dyes difficult to dye, and causes disadvantages such as light coloring, dark shade, and poor color fastness.
In order to improve its dyeing rate, the previous researches were all based on a series of modifications based on the alkali denaturation of ramie fiber (Jin Yongan, Geng Qinyu, Hu Xuemei. Modification and denaturation of ramie fiber [J]. Wool Spinning Science and Technology, 2004, 15( 7):53-55.), which aggravates the environmental pollution treatment of the printing and dyeing industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step (1): Add 60g of N-methylmorpholine-N-oxide into 40ml of distilled water, stir at room temperature until completely dissolved, and prepare N-methylmorpholine-N with a mass fraction of 60%. - Aqueous oxide solution.

[0022] Step (2): Take 5 g of combed ramie and add it to 50 ml of 60% N-methylmorpholine-N-oxide aqueous solution at a bath ratio of 1:10.

[0023] Step (3): heat the step (2) to 80°C for 60 minutes at this temperature, and then wash with 80°C distilled water for 3 times to obtain swollen combed ramie.

[0024] Step (4): Swelling rate detection of combed ramie

[0025] The diameter of combed ramie before and after swelling was photographed by the camera system under a high-power electron microscope, randomly sampled, and tested in parallel three times; according to formula (1), the maximum swelling rate was determined to be 209% by calculation.

[0026] (1)

[0027] In the formula: L is the diameter swelling rate of rami...

Embodiment 2

[0030] Step (1): Add 60 g of N-methylmorpholine-N-oxide into 60 ml of distilled water, stir at room temperature until completely dissolved, and prepare N-methylmorpholine-N-oxide with a mass fraction of 50%. Aqueous N-oxide solution.

[0031] Step (2): Take 5g of combed ramie and add it to 75ml of 50% N-methylmorpholine-N-oxide aqueous solution at a bath ratio of 1:15.

[0032] Step (3): heat the step (2) to 80°C for 80 minutes at this temperature, and then wash with 80°C distilled water for 3 times to obtain swollen combed ramie.

[0033] Step (4): Swelling rate detection of combed ramie

[0034] With embodiment 1, after testing, the average swelling rate of the ramie combed hemp that this example obtains is 165%.

Embodiment 3

[0036] Step (1): Add 60 g of N-methylmorpholine-N-oxide into 90 ml of distilled water, stir at room temperature until completely dissolved, and prepare N-methylmorpholine with a mass fraction of 40% -N-oxide aqueous solution.

[0037] Step (2): Take 5g of combed ramie and add it to 100ml of 40% N-methylmorpholine-N-oxide aqueous solution at a bath ratio of 1:20.

[0038] Step (3): Heat step (2) to 80°C for 65 minutes at this temperature, then wash 3 times with 80°C distilled water to obtain swollen combed ramie

[0039] Step (4): Swelling rate detection of combed ramie

[0040] With embodiment 1, after testing, the average swelling rate of the ramie combed hemp that this example obtains is 150%.

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PUM

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Abstract

The invention discloses a method for swelling combed ramie fibers. Specifically, the combed ramie fibers are swelled at the swelling temperature of 20 to 80 DEG C for 5 to 120 minutes by taking aqueous solution of N-methylmorpholine-N-oxide as a solvent under the conditions of mass fraction of the aqueous solution of N-methylmorpholine-N-oxide of 20 to 90 percent and bath ratio of 1:5 to 1:50. In the method, the combed ramie fibers can be effectively swelled; and the method can increase the dye absorption rate and dye-uptake of the combed ramie fibers in dyeing, and has the advantages of fewer treatment steps, short treatment time, low energy consumption, favorability for environmental protection and the like.

Description

technical field [0001] The invention belongs to the technical field of swelling cellulose fibers, in particular to a method for swelling ramie combed hemp fibers. Background technique [0002] Ramie fiber has cool, breathable, antibacterial and other properties, and is known as the "king of natural fibers". (Liu Xiaoxia, He Wenyuan. Research on High Performance Ramie Modified Fiber[J]. Textile Science Research, 2004(1):41-44.). In recent years, with the further increase of my country's cotton gap and the depletion of petroleum and other chemical resources, the position of hemp natural fiber crops represented by ramie fiber in my country's textile raw materials has become increasingly important. However, problems such as low dye uptake of ramie fiber limit the development of this type of product. [0003] Ramie fiber has high crystallinity and orientation, and tight molecular structure, which affects the penetration ability of dyes, makes dyes difficult to dye, and causes d...

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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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/355D06M101/06
Inventor 蔡映杰曾庆福林丽娜陈悟崔永明李玉广陈洪高王军潘飞苏工兵
Owner WUHAN TEXTILE UNIV
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