Graphene-coated pan-based ladder polymer ultra-short nanofibers and its preparation method and application

A nanofiber and graphene technology, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of low conductivity and inferior conductivity of semiconductors

Active Publication Date: 2021-03-05
JIANGXI ADVANCED NANOFIBER S&T CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conductivity of this ladder polymer is low, below 10-6S / cm, which is not as good as that of semiconductors

Method used

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  • Graphene-coated pan-based ladder polymer ultra-short nanofibers and its preparation method and application

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preparation example Construction

[0022] What the first aspect of the present invention provides is a kind of preparation method of graphene-coated PAN-based ladder polymer ultra-short nanofiber, and the steps include at least:

[0023] (1) the polyacrylonitrile fiber mat and / or non-woven fabric is impregnated with graphene dispersion, cut into strips after drying;

[0024] (2) Draw the strips with hot air at 80°C-150°C to prepare graphene-coated PAN electrospun oriented fiber tows;

[0025] (3) The electrospun oriented fiber tow is subjected to air oxidation and inert gas cyclization to form a graphene-coated PAN-based ladder polymer nanofiber oriented tow, which is further cut to obtain a graphene-coated PAN-based ladder polymer superstructure. short nanofibers.

[0026] The polyacrylonitrile described in the present invention is not particularly limited, and generally commercially available polyacrylonitrile can be used in the present invention. In the present invention, PAN is the abbreviation of polyacry...

Embodiment 1

[0058] Graphene is coated with the preparation method of PAN-based ladder polymer ultrashort nanofiber, and the steps comprise:

[0059] (1) the polyacrylonitrile non-woven fabric is impregnated with the graphene dispersion liquid, and cut into strips after drying;

[0060] (2) Hot air drawing is carried out to strip, prepares graphene-coated PAN electrospun oriented fiber tow;

[0061] (3) The electrospun oriented fiber tow is subjected to air oxidation and inert gas cyclization to form a graphene-coated PAN-based ladder polymer nanofiber oriented tow, which is further cut to obtain a graphene-coated PAN-based ladder polymer superstructure. short nanofibers;

[0062] The preparation of the polyacrylonitrile non-woven fabric in the step (1) is as follows: polyacrylonitrile and an appropriate amount of solvent are added to the polymerization reactor, stirred and dissolved to obtain a polyacrylonitrile solution, and electrospun in a high-voltage electric field is used. The sta...

Embodiment 2

[0065] Graphene is coated with the preparation method of PAN-based ladder polymer ultrashort nanofiber, and the steps comprise:

[0066] (1) the polyacrylonitrile fiber mat is impregnated with the graphene dispersion, and cut into strips after drying;

[0067] (2) Hot air drawing is carried out to strip, prepares graphene-coated PAN electrospun oriented fiber tow;

[0068] (3) The electrospun oriented fiber tow is subjected to air oxidation and inert gas cyclization to form a graphene-coated PAN-based ladder polymer nanofiber oriented tow, which is further cut to obtain a graphene-coated PAN-based ladder polymer superstructure. short nanofibers;

[0069] The preparation of the polyacrylonitrile fiber felt in the step (1) is as follows: polyacrylonitrile and an appropriate amount of solvent are added to the polymerization reactor, stirred and dissolved to obtain a polyacrylonitrile solution, and electrospun in a high-voltage electric field is carried out. The mesh belt is a c...

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Abstract

The present invention relates to the field of preparation of nanofibers, and provides a method for preparing graphene-coated PAN-based ladder polymer ultrashort nanofibers, the steps at least comprising: (1) impregnating polyacrylonitrile fiber mats and / or non-woven fabrics with graphene The dispersion liquid is cut into strips after drying; (2) the strips are drawn by hot air at 80°C-150°C to prepare graphene-coated PAN electrospun oriented fiber bundles; (3) the electrospun oriented fibers The bundles are subjected to air oxidation and inert gas cyclization to form oriented filament bundles of graphene-coated PAN-based ladder polymer nanofibers, which are further cut to obtain graphene-coated PAN-based ladder polymer ultrashort nanofibers.

Description

technical field [0001] The invention relates to the field of preparation of nanofibers, in particular to a graphene-coated PAN-based ladder polymer ultra-short nanofiber and its preparation method and application. Background technique [0002] With the continuous development of social economy, the global demand for new fibers with special functions is increasing, especially fibers with high strength and high conductivity are gradually being explored for applications in reinforcing materials, functional clothing, new energy electrodes, electromagnetic fields, military and other fields. Modified fiber materials have become one of the hot spots in the field of composite materials research. [0003] Graphene is a new type of inorganic material, made of cheap graphite, its ultimate modulus is 1.01TPa, and its ultimate strength is 116GPa. At the same time, it has high thermal conductivity, high specific surface area and excellent electron transport properties. An ideal material ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/60H01M4/62B82Y30/00
CPCB82Y30/00H01M4/366H01M4/604H01M4/625Y02E60/10
Inventor 侯豪情潘萍萍王煜明程楚云欧阳文王琦吕晓义
Owner JIANGXI ADVANCED NANOFIBER S&T CO LTD
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