Preparation method of graphene-carbon nanotube composite fiber with helical structure

A carbon nanotube composite and helical structure technology, which is applied in the chemical characteristics of fibers, textiles and papermaking, and inorganic raw material artificial filaments, etc., can solve the problems of difficulty in achieving large size and insufficient mixing of graphene and carbon nanotube composite fibers. , to achieve the effect of continuous and uniform fiber morphology and unique structure

Active Publication Date: 2017-08-15
ZHENGZHOU UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The present invention proposes a method for preparing a helical graphene-carbon nanotube composite fiber, which solves the problem that the graphene-carbon nanotube composite fiber in the prior art is not mixed uniformly and is difficult to achieve a large size

Method used

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  • Preparation method of graphene-carbon nanotube composite fiber with helical structure
  • Preparation method of graphene-carbon nanotube composite fiber with helical structure
  • Preparation method of graphene-carbon nanotube composite fiber with helical structure

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Effect test

Embodiment 1

[0046] Embodiment 1: graphene solution can be prepared according to the method comprising the following steps: a certain amount of expanded graphite is dissolved in the mixed solution of sulfuric acid and phosphoric acid, after stirring, slowly add a certain amount of permanganate under ice bath conditions Potassium particles, after the reaction is complete, add deionized water to dilute, and add hydrogen peroxide to fully oxidize, then use acid and water to repeatedly centrifugally clean the reactants, and finally prepare a uniformly distributed graphene oxide solution. The steps are as follows:

[0047] (1) Take 200ml of sulfuric acid and 50ml of phosphoric acid, mix them evenly in a 1-liter beaker, and add 3 grams of worm graphite of about 300 mesh.

[0048] (2) Slowly add 20 grams of potassium permanganate particles under ice bath conditions.

[0049] (3) Under the condition of 40℃ water bath, react for 4 hours.

[0050] (4) Slowly add 700ml of deionized water into the be...

Embodiment 2

[0054] Take a graphene oxide aqueous solution with a concentration of 5 mg / mL, and then prepare a continuously grown carbon nanotube film by chemical vapor deposition, and mix the continuous carbon nanotube film with the graphene oxide solution layer by layer, continuously After collecting for 1 h, a uniform, layered and flexible graphene oxide-carbon nanotube composite film was obtained. After natural drying, the composite film was cut into strips (3 mm) with adjustable width, which were rotated and spun by the rotation of a motor in a humid environment to obtain helical graphene oxide-carbon nanotube helical fibers , followed by chemical reduction with hydriodic acid to obtain graphene-carbon nanotube helical fibers. The helical structure is observed by a scanning electron microscope (model JEOL JSM-6700), and its diameter is about 250-300 microns.

[0055] The preparation method of graphene solution in the present embodiment is the same as embodiment 1.

Embodiment 3

[0057] Take a graphene oxide aqueous solution with a concentration of 5 mg / mL, and then prepare a continuously grown carbon nanotube film by chemical vapor deposition, and mix the continuous carbon nanotube film with the graphene oxide solution layer by layer, continuously After collecting for 1 h, a uniform, layered and flexible graphene oxide-carbon nanotube composite film was obtained. After natural drying, the composite film was cut into strips (4 mm) with adjustable width, which were rotated and spun by the rotation of a motor in a humid environment to obtain helical graphene oxide-carbon nanotube helical fibers , followed by chemical reduction with hydriodic acid to obtain graphene-carbon nanotube helical fibers. The helical structure is observed by a scanning electron microscope (model JEOL JSM-6700), and its diameter is about 300-350 microns.

[0058] The preparation method of graphene solution in the present embodiment is the same as embodiment 1.

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Abstract

The invention provides a preparation method of a graphene-carbon nanotube composite fiber with a helical structure. The preparation method is used for solving problems in the prior art that mixing of traditional graphene-carbon nanotube composite fiber is not uniform, and large-size product is difficult to prepare. The preparation method comprises following steps: 1, an oxidized graphene aqueous solution is prepared; 2, carbon nanotube film is prepared; 3, a rotating wheel is used for collecting prepared carbon nanotube film, and is immersed in an oxidized graphene aqueous solution at the same time so as to obtain an oxidized graphene and carbon nanotube mixed film; and 4, the oxidized graphene and carbon nanotube mixed film is dried in the air, is collected from the rotating wheel via cutting, is subjected to twisting so as to achieve the helical structure, and then is subjected to chemical reduction so as to obtain the graphene-carbon nanotube composite fiber. The graphene-carbon nanotube composite fiber is unique in structure, and is stretchable; and the resistance changes regularly with deformation in a fiber elastic stretchable range.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing helical graphene-carbon nanotube fibers. Background technique [0002] As an emerging material based on graphene, graphene fiber not only inherits the good thermoelectric properties of graphene, but also attracts attention as a potential high-performance textile fiber, although graphene fiber has relatively Good mechanical properties and functional application characteristics, but there is still a big gap in its performance compared with graphene. How to improve the mechanical properties and spinnability of graphene fibers is still a big challenge. [0003] At present, there are many ways to strengthen graphene fibers, such as metal ion bath strengthening, vacuum ultra-high temperature graphitization strengthening; preparing graphene composite fibers by compounding graphene with other polymers to improve its mechanical properti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/12D01F9/08
CPCD01F9/08D01F9/12
Inventor 上媛媛花春飞王颖郭佳慧
Owner ZHENGZHOU UNIV
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