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Method for preparing carbon nanofibers from wearing acrylic fibers or waste wearing acrylic fibers

A technology of nano-carbon fiber and acrylic fiber, applied in the direction of fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of enlargement, achieve the effect of rich sources, improved flexibility, and easy operation

Active Publication Date: 2018-09-14
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently there is still a lack of methods and technologies for preparing nano-carbon fibers using acrylic fibers as raw materials, especially discarding acrylic fibers, such as acrylic fiber scraps generated during production and processing, dyed and undyed, single or blended acrylic fibers, yarns, tops And fabrics (sweaters, scarves, curtains, etc.), because they contain chemical impurities such as dyes and printing and dyeing auxiliaries, it further increases the difficulty of preparing carbon nanofibers with complete fiber shape, no adhesion, excellent mechanical strength, and good flexibility.

Method used

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  • Method for preparing carbon nanofibers from wearing acrylic fibers or waste wearing acrylic fibers
  • Method for preparing carbon nanofibers from wearing acrylic fibers or waste wearing acrylic fibers
  • Method for preparing carbon nanofibers from wearing acrylic fibers or waste wearing acrylic fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Adopt the method for preparing nano-carbon fiber by taking acrylic fiber, the specific process of this method is as follows:

[0033] (1) Wash the acrylic yarn twice with deionized water and acetone alternately, sieve to remove solid impurities, dry at 80°C for 24 hours, and set aside;

[0034] (2) Dissolving the acrylic yarn in step (1) in DMF, the mass ratio of acrylic yarn to DMF is 1:8, and after being completely dissolved, an unmodified spinning precursor is obtained for use;

[0035] (3) Add sodium acetate to the spinning precursor obtained in step (2). The amount of sodium acetate added is 5% of the mass of the acrylic yarn (calculated as 100% of the mass of the acrylic yarn), and modified at 100°C for 1h , to obtain a modified spinning precursor;

[0036] (4) The spinning precursors in steps (2) and (3) are prepared by electrospinning technology to prepare nano-acrylic fibers;

[0037] (5) The nano-acrylic fiber in step (4) is subjected to continuous pre-oxida...

Embodiment 2

[0041] Adopt the method for preparing nano-carbon fiber by taking acrylic fiber, the specific process of this method is as follows:

[0042] (1) Exactly the same as step (1) in Example 1, purifying acrylic fiber;

[0043] (2) Dissolving the acrylic yarn in step (1) in DMF, the mass ratio of acrylic yarn to DMF is 1:10, and after being completely dissolved, an unmodified spinning precursor is obtained for use;

[0044] (3) Add nickel acetate to the spinning precursor in step (2), the amount of nickel acetate added is 10% of the mass of acrylic fiber yarn (calculated as 100% of the mass of acrylic fiber yarn), and modified at 85°C for 10h, Obtain modified spinning precursor;

[0045] (4) Prepare nano-acrylic fibers from the spinning precursors in steps (2) and (3) by centrifugal spinning technology;

[0046] (5) Analyze the thermal properties of the unmodified and modified nano-acrylic fibers prepared in step (4) using a differential scanning calorimeter (DSC), as shown in f...

Embodiment 3

[0049] Adopt the method for preparing nano-carbon fiber by taking acrylic fiber, the specific process of this method is as follows:

[0050] (1) Exactly the same as step (1) in Example 1, purifying acrylic fiber;

[0051] (2) Dissolving the acrylic yarn in step (1) in DMF, the mass ratio of acrylic yarn to DMF is 1:6, and after being completely dissolved, an unmodified spinning precursor is obtained for use;

[0052] (3) Add zinc chloride and copper chloride to the spinning precursor of step (2), wherein the additions of zinc chloride and copper chloride are respectively 10% and 10% of the mass of acrylic yarn (acrylic yarn Yarn quality is 100%), modified at 50°C for 6h to obtain a modified spinning precursor;

[0053] (4) Using the spinning precursors in steps (2) and (3) to prepare nano-acrylic fibers by brush spinning;

[0054] (5) Analyze the thermal properties of the unmodified and modified nano-acrylic fibers prepared in step (4) using a differential scanning calorimet...

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Abstract

The invention relates to a method for preparing carbon nanofibers from wearing acrylic fibers or waste wearing acrylic fibers, and belongs to the technical field of preparation of the carbon nanofibers. The method includes performing washing, impurity removal and drying pretreatment on the wearing acrylic fibers or the waste wearing acrylic fibers, then re-dissolving the acrylic fibers by good solvents, adding metal salt for modifying, controlling modification temperature and time to obtain spinning precursors, and performing spinning, pre-oxidation and carbonation on the spinning precursors to obtain the carbon nanofibers. The metal salt for modification refers to one or two or more of cobalt acetate, manganese acetate, zinc acetate, ferric acetate, nickelous acetate, copper acetate, magnesium acetate, sodium acetate, cobalt chloride, zinc chloride, manganese chloride, ferric chloride, copper chloride, cuprous chloride or stannous chloride. Raw materials applied to the method are waste. The method has the advantages that cyclization reaction triggering mechanisms of the acrylic fibers during pre-oxidation can be changed, cyclization reaction starting temperatures of the acrylic fibers can be lowered remarkably at the same time, energy conservation and environmental protection can be achieved, and production costs can be reduced remarkably.

Description

technical field [0001] The invention relates to a method for preparing carbon nanofibers, in particular to a method for preparing carbon nanofibers by taking or discarding acrylic fiber, and belongs to the technical field of carbon nanofiber preparation. Background technique [0002] The application of carbon nanofibers is constantly being developed, and is widely used in energy storage, sensing and catalysis. Nano-carbon fiber preparation technology has been developed and upgraded, especially with the breakthrough of nano-fiber spinning technology such as electrospinning, centrifugal spinning, force spinning and brush spinning, mass production of nano-carbon fiber has become possible, and the industrialization of nano-carbon fiber preparation and application is expected to be realized. [0003] However, what does not match the continuous maturity of the technology required for the industrialization of carbon nanofibers is the high price of raw materials required for the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22
CPCD01F9/22
Inventor 胡毅陈仁忠
Owner ZHEJIANG SCI-TECH UNIV
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