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A kind of preparation method of absorbing dye fiber and its rope

A technology for adsorbing dyes and fibers, applied in the chemical characteristics of fibers, rayon manufacturing, textiles and papermaking, etc., can solve the problems of easy inhalation, material loss, safety problems, etc., and achieve the effect of simple and reliable synthesis process

Active Publication Date: 2021-06-04
JIULI ROPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the conventionally obtained pterene-based materials are in the form of powder. On the one hand, they are easily inhaled into the human body during use, which may easily lead to safety problems; on the other hand, powder materials are not easy to recycle after use, which may easily lead to material loss

Method used

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  • A kind of preparation method of absorbing dye fiber and its rope
  • A kind of preparation method of absorbing dye fiber and its rope
  • A kind of preparation method of absorbing dye fiber and its rope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment provides a dye-absorbing fiber. The chemical composition of the dye-absorbing fiber according to the weight percentage is: 5 wt% of the pterene skeleton polymer, and the total content of polyacrylonitrile and polyurethane is 95 wt%. The value is an integer and above 50, the sulfur content is 2.4%; the mass ratio of polyacrylonitrile to polyurethane is 1:1; the molecular weights of polyacrylonitrile and polyurethane are 80,000-200,000 and 200,000-400,000, respectively. The preparation method is as follows: according to the above proportions, mix the pterene skeleton polymer and methanol uniformly to obtain a pterene skeleton polymer dispersion with a mass concentration of 20%; mix polyacrylonitrile, polyurethane and N,N-dimethylacetamide Mix evenly to obtain a composite spinning solution with a total mass concentration of 30%; mix the dispersion liquid and the composite spinning solution evenly and prepare composite fibers by wet spinning process, wherein ...

Embodiment 2

[0042] The composite fiber prepared in Example 1 is directly added to different concentrations of methylene blue solutions for adsorption. The steps of dye adsorption performance test are: configure dye solutions (single dye or mixed dyes), fibers or ropes were added to these dye solutions, and the amount added was calculated according to 0.1 mg / ppm dye, and the dye concentration before and after adsorption was tested by a UV-visible spectrophotometer, so as to obtain the adsorption rate of the dye.

[0043] The steps applied to the repeated adsorption of the dye solution are as follows: the fiber (or rope) after the dye adsorption is first passed through the desorption process, and then recycled for the dye adsorption. Among them, the desorption mainly adopts solvent elution, and the elution solvent is: one or more of methanol, ethanol, acetone, ethyl acetate; One or more of the methods of mechanical shock for 30 to 90 minutes are used in combination.

[0044] The results of...

Embodiment 3

[0046] This embodiment provides a dye-absorbing fiber. The chemical composition of the dye-absorbing fiber according to the weight percentage is: 10 wt% of the pterene skeleton polymer, and the total content of polyacrylonitrile and polyurethane is 90 wt%. The value is an integer and above 50, the sulfur content is 4.4%; the mass ratio of polyacrylonitrile to polyurethane is 1:3; the molecular weights of polyacrylonitrile and polyurethane are 80,000 to 200,000 and 200,000 to 400,000, respectively. The preparation method is as follows: according to the above proportions, mix the pterene skeleton polymer and methanol uniformly to obtain a pterene skeleton polymer dispersion with a mass concentration of 30%; mix polyacrylonitrile, polyurethane and N,N-dimethylacetamide Mix evenly to obtain a composite spinning solution with a total mass concentration of 30%; mix the dispersion and the composite spinning solution evenly and prepare composite fibers by wet spinning process, wherein ...

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Abstract

The invention provides a preparation method of dye-absorbing fibers and ropes thereof. The chemical composition of the dye-absorbing fiber according to weight percentage is: 2-20 wt% of pterene skeleton polymer, the total content of polyacrylonitrile and polyurethane is 80-98 wt%, wherein the mass ratio of polyacrylonitrile and polyurethane is 1:(0.25-4 ); the structural formula of the pterene skeleton polymer is: wherein, n is an integer and ≥ 50, and the sulfur content is 0.5-5.0 wt%. The rope is braided from the above-mentioned multiple dye-absorbing fibers. The preparation method comprises: uniformly mixing the pterene skeleton polymer with a solvent to obtain a pterene skeleton polymer dispersion liquid; uniformly mixing polyacrylonitrile, polyurethane and solvent two to obtain a composite spinning solution; mixing the dispersion liquid and the composite spinning solution After uniformity, the composite fiber is prepared by wet spinning process. The highest adsorption efficiency of the composite fiber and its rope applied to the dye adsorption process can be kept above 90%.

Description

technical field [0001] The invention belongs to the field of functional fiber preparation, and in particular relates to a preparation method of a dye-absorbing fiber and a rope thereof. Background technique [0002] The problem of dye pollution has increasingly become one of the most important global hot issues. As we all know, the COD, BOD and other indicators of water polluted by dyes seriously exceed international standards, causing great harm to human living water and health [1]. This type of wastewater mainly comes from the synthesis of dyes and the production of dye intermediates. It is composed of the mother liquor of crystallization of various products and intermediates, materials lost during the production process, and wastewater from equipment. To date, more than 100,000 commercial dyes are known, with an annual output of more than 7×10 5 tons / year[1], the industrial sector will discharge 30,000 to 150,000 tons of dye materials into the water[4], the total dye con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/08D01F8/16D01F1/10
CPCD01F1/10D01F8/08D01F8/16
Inventor 谭淋姜文松李忠明纪俊祥冯百明王海江李亚静
Owner JIULI ROPE