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Pleated graphene fiber, graphene-fiber non-woven fabric and preparation methods of pleated graphene fiber and graphene-fiber non-woven fabric

A graphene fiber, non-woven technology, applied in the direction of chemical characteristics of fibers, textiles and papermaking, chemical post-processing of rayon, etc., can solve the problems that have not been reported, and achieve the effect of wide application prospect and simple preparation method.

Active Publication Date: 2017-12-22
HANGZHOU GAOXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, graphene fiber non-woven fabrics with multi-level structure have not been reported

Method used

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  • Pleated graphene fiber, graphene-fiber non-woven fabric and preparation methods of pleated graphene fiber and graphene-fiber non-woven fabric
  • Pleated graphene fiber, graphene-fiber non-woven fabric and preparation methods of pleated graphene fiber and graphene-fiber non-woven fabric
  • Pleated graphene fiber, graphene-fiber non-woven fabric and preparation methods of pleated graphene fiber and graphene-fiber non-woven fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) The graphene oxide / water solution with a concentration of 5 mg / mL was used as the spinning solution, and the calcium chloride / water / ethanol mixture (mass ratio 20:300:100) was used as the coagulation bath for continuous wet spinning.

[0028] (2) The obtained graphene oxide fibers were left at room temperature for 12 hours, and then vacuum-dried at a temperature of 80° C. for 3 hours.

[0029] (3) Soak the fully dried graphene oxide fiber in a hydrothermal kettle filled with water for hydrothermal treatment, and the treatment condition is 200° C. for 12 hours.

[0030] (4) Obtain multi-fold graphene fibers after drying in air.

[0031] After the above steps, the obtained graphene fiber has an obvious wrinkled structure, the fiber strength is about 90MPa, and the conductivity is 102S / m.

Embodiment 2

[0033] (1) The graphene oxide / N, N-dimethylformamide solution with a concentration of 5 mg / mL was used as the spinning solution, and ethyl acetate was used as the coagulation bath for continuous wet spinning.

[0034] (2) The obtained graphene oxide fiber was placed at room temperature for 14 hours, and then vacuum-dried at 60° C. for 3 hours.

[0035] (3) Soak the fully dried graphene oxide fiber in a hydrothermal kettle filled with water for hydrothermal treatment, and the treatment condition is 150° C. for 12 hours.

[0036] (4) Using a high-speed shear mixer with a rotating speed of 3000rpm, the graphene fibers after the hydrothermal treatment are crushed into short fibers with a length of 4 mm, deposited on a filter screen, and dried in the air to obtain a graphene fiber non-woven fabric.

[0037] After the above steps, the obtained graphene fiber non-woven fabric has a multi-level structure, the graphene fiber surface is rough, contains a large number of wrinkles and pro...

Embodiment 3

[0039] (1) The graphene oxide aqueous solution with a concentration of 15 mg / mL is used as the dispersion liquid, and the calcium chloride / water / ethanol mixture is used as the coagulation bath for continuous wet spinning.

[0040] (2) The obtained graphene oxide fiber was placed at room temperature for 15 hours, and then vacuum-dried at 100° C. for 3 hours.

[0041] (3) Soak the fully dried graphene oxide fiber in a hydrothermal kettle filled with water for hydrothermal treatment, and the treatment condition is 80° C. for 12 hours.

[0042] (4) Use a high-speed shear mixer to crush the graphene fibers after the hydrothermal treatment into short fibers at a speed of 5000rpm, and deposit them on a filter screen, and obtain a graphene fiber non-woven fabric with a multi-level structure after drying in the air.

[0043] (5) The dried graphene fiber non-woven fabric is further chemically reduced by using hydrazine hydrate.

[0044] After the above steps, the obtained graphene fibe...

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Abstract

The invention discloses a graphene fiber with a pleated structure, a graphene-fiber non-woven fabric and preparation methods of the graphene fiber and the graphene-fiber non-woven fabric. The surface of the graphene fiber contains a large number of pleated microstructures and can be used for forming the graphene-fiber non-woven fabric with a multi-pleat structure, so that the specific surface area of the non-woven fabric is remarkably increased; the graphene fiber and a communication network structure formed by the fiber have higher conductivity and flexibility simultaneously, and accordingly, the graphene fiber can be used as a flexible electrode material to be applied to wearable energy storage devices.

Description

technical field [0001] The invention relates to graphene fibers and fabrics, in particular to a graphene fiber and a graphene fiber non-woven fabric formed by stacking crumpled graphene sheets and a preparation method thereof. Background technique [0002] Graphene fiber non-woven fabric is a new type of non-woven fabric composed of graphene fibers (Nature Communications, 2016, 13684). Due to the fusion of graphene fibers at the overlapping joints, this non-woven material It has excellent electrical and thermal conductivity properties, which fully reflects the excellent characteristics of graphene on a macro scale (Science, 2004, 306:666-669). Thanks to the highly conductive network structure presented by graphene fiber nonwovens, it has great application potential as a flexible fabric electrode in the field of energy storage devices such as capacitors and batteries. [0003] The existing graphene fiber non-woven fabrics have good flexibility and high electrical conductivit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/12D01F11/16
CPCD01F9/12D01F11/16
Inventor 高超李拯
Owner HANGZHOU GAOXI TECH CO LTD
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