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A kind of dope dyed composite fiber and its preparation method

A composite fiber, dope dyeing technology, applied in the direction of chemical characteristics of fibers, cellulose/protein conjugated rayon, adding dyes in spinning solutions, etc., to achieve the effect of improving hygroscopic performance, environmental protection and high efficiency in the production process, and uniform coloring

Active Publication Date: 2021-03-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, there are many products that use nanocellulose or modified nanocellulose as reinforcements to reinforce polymer materials, but it has not appeared to add nanocellulose as a colorant to synthetic high polymer spinning dope after dyeing Preparation of colored composite fibers in the medium to improve their dyeability and antistatic properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Preparation of dope-dyed polyacrylonitrile composite fiber.

[0020] (1) Select a nanocellulose aqueous dispersion with a solid content of less than 5wt%, a diameter of 10-50nm, and a length of 100-1000nm, and ultrasonically disperse it in an ultrasonic cleaning machine for 15 minutes with an ultrasonic power of 180-300W to obtain a well-dispersed The nanocellulose aqueous dispersion is placed in a 60°C water bath to keep warm.

[0021] (2) Weigh 0.1g Vat Blue RSN into a 250ml silk bottle, place it in a 60°C water bath, add 5 drops of Swire oil to make a slurry, add 50ml deionized water, weigh 1.5g sodium hydroxide and add Wherein, the magnetic stirring was turned on, and after the temperature of the solution rose to 60° C., 0.8 g of sodium hydrosulfite was added and reacted for 15 minutes. Take 50ml of the nanocellulose aqueous dispersion obtained in step (1) and add it into it, finish the dyeing after 50min, centrifuge and wash twice with deionized water t...

Embodiment 2

[0025] Example 2: Preparation of dope-colored polyvinyl alcohol composite fiber.

[0026] (1) Select the nano-cellulose aqueous dispersion with a solid content of less than 5wt%, a diameter of 10-50nm, and a length of 100-1000nm, and ultrasonically disperse in an ultrasonic cleaning machine for 15 minutes with an ultrasonic power of 180-300W to obtain good dispersion. aqueous nanocellulose dispersion.

[0027] (2) Take 100ml of the dispersion obtained in step (1) in a silk bottle, place it in a water bath at 60°C, turn on magnetic stirring, add 0.1g of MEGAFIX type reactive red B-4BD, dye for 10min, add 2g of sodium sulfate, and dye 10min, then add 2g sodium sulfate, dye for 25min, add 0.6g sodium carbonate, dye for 15min, then add 1.4g sodium carbonate, continue dyeing for 45min and end. Centrifugal washing with deionized water to remove unreacted dyes and residual dyeing auxiliaries, adding an appropriate amount of water to obtain a dyed nanocellulose aqueous dispersion wit...

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Abstract

The invention discloses stock solution colouring composite fibers and a preparation method thereof. The composite fibers are obtained by adding dyeing nano-cellulose into polymer solution and performing solution spinning. The preparation method of the stock solution colouring composite fibers comprises the following steps: (1) preparing dyeing nano-cellulose dispersing liquid; (2) preparing the polymer solution; (3) mixing the dyeing nano-cellulose dispersing liquid and the polymer solution, fully stirring, and performing filtering treatment and defoaming treatment in sequence to obtain uniform and stable mixed spinning solution; (4) performing solution spinning on the mixed spinning solution. The stock solution colouring composite fibers prepared by the preparation method are uniform in colouring and high in colour fastness; a process is simple; a dye can be fully utilized; a production process is environment-friendly and high-efficiency; meanwhile, the moisture absorption performance, the anti-static performance and the biodegradability of the fibers can be improved.

Description

technical field [0001] The invention belongs to the field of raw materials for textile industry and its manufacture, and in particular relates to a dope-colored composite fiber and a preparation method thereof. Background technique [0002] Since the advent of synthetic fibers, they have been valued by the textile industry for their light weight, high strength, good elasticity, mildew and insect resistance, and other excellent properties. However, compared with traditional natural fibers, synthetic fibers also have some obvious defects, such as Poor hygroscopicity, poor antistatic performance, and difficult dyeing, etc., limit the application of some synthetic fibers in the field of textile and clothing to a certain extent. Take polyacrylonitrile fiber as an example. As one of the three major synthetic fibers, although it has softness and warmth retention properties similar to wool, it is easy to accumulate static electricity and difficult to dye. [0003] In order to impro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/54D01F6/50D01F8/08D01F8/10D01F8/02D01F1/06
CPCD01F1/06D01F6/50D01F6/54D01F8/02D01F8/08D01F8/10
Inventor 陈胜董立琴顾迎春阎斌
Owner SICHUAN UNIV
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