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Moisture-absorption polyacrylonitrile fibers

A technology of polyacrylonitrile fiber and solution, applied in the direction of fiber type, fiber treatment, biochemical fiber treatment, etc., can solve the problems of reducing the wearing performance of polyacrylonitrile fiber, difficult to absorb and distribute sweat, and low durability of treatment effect. Increase hydrophilic performance, not easy to lose, and enhance the effect of water retention

Inactive Publication Date: 2019-10-08
HAIYAN SHUOCHUANG CLOTHING RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The official moisture regain of natural fibers is about 8-15%, while that of polyacrylonitrile fibers is only 2%. It shows serious defects in properties related to human skin-friendly properties such as hygroscopicity and moisture permeability. Clothes feel stuffy when worn, sweat is not easily absorbed and dissipated, and has strong static electricity, often requiring additional functional treatment or reducing the blending ratio of post-spinning, which not only increases the processing cost, but also has low durability of the treatment effect, thus greatly reducing polypropylene. The wearability of nitrile fibers is even more limited in some fields with antistatic requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The preparation method of hygroscopic polyacrylonitrile fiber of the present invention comprises,

[0025] Step 1: Place the polyacrylonitrile fiber in the reactor, and add a mixed solution containing a NaOH solution with a concentration of 3.8-5.6% and a basic amino acid solution with a concentration of 0.5-1.6% at a bath ratio of 1:20-28, Wherein the volume ratio of the NaOH solution and the basic amino acid solution is 100:3-10, and the hydrolysis is carried out at a temperature of 70-95° C. for 8-14 minutes;

[0026] Step 2: After hydrolyzing and cooling, neutralize to a pH of 6-7, then add a cross-linking agent solution for cross-linking, and finally wash with water, and dry the obtained hygroscopic polyacrylonitrile fiber at 100-110°C.

[0027] The basic amino acids used in the hydrolysis process include arginine, lysine, and histidine. On the one hand, the hydrolysis of basic amino acids generates more negative hydroxide ions than positive hydrogen ions, which ca...

Embodiment 1

[0035] A method for the preparation of hygroscopic polyacrylonitrile fibers comprising,

[0036] Step 1: Put the polyacrylonitrile fiber bundle in the reactor, add a mixed solution containing a 3.8% NaOH solution and a 0.5% arginine solution at a bath ratio of 1:20, and then add polyacrylonitrile Ethanol with 4 times the weight of fiber bundles and mannitol with 0.04 times the weight of polyacrylonitrile fiber bundles, wherein the volume ratio of NaOH solution and arginine solution is 100:3, and the temperature is 70° C. and hydrolyzed for 8 minutes;

[0037] Step 2: neutralize the hydrolysis to pH 6 after cooling, then add AlCl with a concentration of 0.05g / L according to the ratio of material to liquid: 1:0.3 (g / mL) 3 ·6H 2 O solution, cross-linked at 90°C for 20 minutes, and finally washed with clean water, and dried the obtained hygroscopic polyacrylonitrile fiber bundle at 100°C to obtain the hygroscopic polyacrylonitrile fiber bundle.

Embodiment 2

[0039] A method for the preparation of hygroscopic polyacrylonitrile fibers comprising,

[0040] Step 1: Put polyacrylonitrile fiber filaments in the reactor, add a mixture containing 5.0% NaOH solution and 1.2% lysine solution at a bath ratio of 1:26, and then add polyacrylonitrile Ethanol with 5 times the weight of fiber filaments and mannitol with 0.1 times the weight of polyacrylonitrile fiber filaments, wherein the volume ratio of NaOH solution and lysine solution is 100:6, and the temperature is 85° C. and hydrolyzed for 10 minutes;

[0041] Step 2: After cooling the hydrolysis, neutralize to pH 6.5, then add AlCl with a concentration of 0.06g / L according to the ratio of material to liquid: 1:0.35 (g / mL) 3 ·6H 2 O solution, cross-linked at 95°C for 35 minutes, and finally washed with clean water, and dried the obtained hygroscopic polyacrylonitrile fiber at 105°C to obtain hygroscopic polyacrylonitrile fiber.

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Abstract

The invention provides moisture-absorption polyacrylonitrile fibers, and belongs to the technical field of chemical fibers. The moisture-absorption polyacrylonitrile fibers are obtained by the following steps: hydrolyzing the polyacrylonitrile fibers by using a mixed solution containing a NaOH solution and an alkaline amino acid solution, neutralizing until the pH value is 6-7 after cooling, and then adding a crosslinking agent solution for crosslinking and cleaning, wherein the moisture regain of the prepared polyacrylonitrile fibers is greater than or equal to 3.64%, and is higher than 375.26% of that of non-hydrophilic modified acrylic fibers. According to the preparation method disclosed by the invention, the carboxyl group in basic amino acid can be connected with acrylic fibers and Al3 + together in a subsequent crosslinking process, the main chain amino group and the side chain basic group of the basic amino acid are kept, the water solubility and the electropositivity of the acrylic fibers are improved, the acrylic fibers are endowed with certain antibacterial activity and lasting property, the color, the shape and the mechanical property of the polyacrylonitrile fibers canbe well kept, and the prepared polyacrylonitrile fibers have lasting antibacterial property, good morphology and mechanical property.

Description

technical field [0001] The invention belongs to the technical field of chemical fibers, in particular to hygroscopic polyacrylonitrile fibers. Background technique [0002] Polyacrylonitrile fiber (abbreviated product name Nitrile) is an important chemical fiber variety and textile raw material. It is the third largest synthetic fiber variety in my country after polyester and nylon. It has excellent warmth retention, dyeability and wool-like properties. It is known as artificial wool and is widely used in knitted underwear, blankets, artificial fur and other clothing fields. However, with the continuous improvement of people's living standards and the development of clothing culture, keeping warm is no longer a single requirement of clothing, and people have higher and higher requirements for its comfort, functionality and safety. The difference in wearing comfort of clothing made of different fiber materials is related to the hygroscopicity of the fiber, which can be expres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/38D06M13/148D06M13/144D06M11/17D06M13/342D06M13/432D06M13/352D06M10/00D06M101/28
CPCD06M10/008D06M11/17D06M11/38D06M13/144D06M13/148D06M13/342D06M13/352D06M13/432D06M16/00D06M2101/28
Inventor 王硕
Owner HAIYAN SHUOCHUANG CLOTHING RES INST
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