Highly-conductive flexible graphene tube and preparation method thereof

A technology of flexible graphite and graphene tubes, applied in the direction of graphene, nano-carbon, etc., can solve the problems of mechanical and conductive properties limiting the application of graphene tubes, low fiber conductivity, and easy damage of the structure, to achieve increased specific surface area, Effect of increasing specific surface area and stabilizing electrical conductivity

Active Publication Date: 2019-01-15
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing methods still have shortcomings in the preparation of highly conductive flexible hollow graphene fibers, such as the low conductivity of the fibers prepared by the limited thermal gelation method, wet spinning method and electrophoretic deposition, while the chemical vapor phase Deposition structure is easily damaged and relatively low flexibility during the preparation of hollow fibers
This lack of mechanical and conductive properties limits the application of graphene tubes in the field of flexible wearable devices

Method used

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  • Highly-conductive flexible graphene tube and preparation method thereof
  • Highly-conductive flexible graphene tube and preparation method thereof
  • Highly-conductive flexible graphene tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] like figure 1 Shown in the flowchart of, a kind of preparation method of highly conductive flexible graphene tube comprises the following steps:

[0044] (1) Prepare the deposition substrate: Twist the polyester fiber bundles until the gap between the fibers is less than 0.4 μm to form a tightly twisted stranded fiber bundle (such as figure 2 shown), as a deposition substrate;

[0045] (2) Electrostatic spraying of graphene oxide: the graphene oxide dispersion is placed in the liquid storage mechanism of the electrostatic spraying device, and the deposition substrate obtained in step (1) is sprayed with graphene oxide with the electrostatic spraying device, and the electrostatic spraying parameter is spray The voltage is 8kV, the spray distance is 3cm, the propulsion rate of the liquid propulsion part of the liquid storage mechanism of the electrostatic spray device to the graphene dispersion is 12ul / min, and the electrostatic spray time is 60min, and the graphene oxi...

Embodiment 2

[0051] like figure 1 Shown in the flowchart of, a kind of preparation method of highly conductive flexible graphene tube comprises the following steps:

[0052] (1) Prepare the deposition substrate: adjust the polyester fiber bundle to a loose fiber bundle with three fiber gaps between 0.4 μm and 2 μm (such as Image 6 shown), as a deposition substrate;

[0053] (2) Electrostatic spraying of graphene oxide: the graphene oxide dispersion is placed in the liquid storage mechanism of the electrostatic spraying device, and the deposition substrate obtained in step (1) is sprayed with graphene oxide with the electrostatic spraying device, and the electrostatic spraying parameter is spray The voltage is 8kV, the spray distance is 3cm, the propulsion rate of the liquid propulsion part of the liquid storage mechanism of the electrostatic spray device to the graphene dispersion is 12ul / min, and the electrostatic spray time is 60min, and the graphene oxide / polymer composite fiber is ob...

Embodiment 3

[0059] like figure 1 Shown in the flowchart of, a kind of preparation method of highly conductive flexible graphene tube comprises the following steps:

[0060] (1) Prepare the deposition substrate: adjust the nylon fiber bundle to a loose fiber bundle with multiple fiber gaps between 0.4 μm and 2 μm (such as Figure 8 shown), as a deposition substrate;

[0061] (2) Electrostatic spraying of graphene oxide: the graphene oxide dispersion is placed in the liquid storage mechanism of the electrostatic spraying device, and the deposition substrate obtained in step (1) is sprayed with graphene oxide with the electrostatic spraying device, and the electrostatic spraying parameter is spray The voltage is 15kV, the spray distance is 10cm, the propulsion rate of the liquid propulsion part of the liquid storage mechanism of the electrostatic spray device to the graphene dispersion is 3μl / min, and the electrostatic spray time is 40min, and the graphene oxide / polymer composite fiber is o...

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Abstract

The invention discloses a highly-conductive flexible graphene tube and a preparation method thereof. The method comprises the following steps: (1) adjusting an interfiber gap of a high-molecular polymer fiber bundle used as a deposition substrate; (2) electrostatically spraying graphene oxide; (3) soaking a composite material in a GaCl2 solution to enhance the mechanical properties of the fibers;(4) performing chemical pre-reduction on the graphene oxide; and (5) carrying out high-temperature heat treatment: completely reducing the graphene oxide and removing the deposition substrate in the sample to obtain the graphene tube. The graphene tube has a large specific surface area and high conductivity and flexibility, and can maintain stable conductivity after repeated bending. The preparation method for the graphene tube is simple in process and low in cost, and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of graphene material preparation, and in particular relates to a highly conductive flexible graphene tube and a preparation method thereof. Background technique [0002] In recent years, with the rise of smart wearable devices, flexible wearable devices based on flexible fibers have received extensive attention, such as carbon-based fiber flexible supercapacitors, carbon-based fiber flexible gas sensors, etc. Flexible wearable devices made of fibers with high specific surface area and high conductivity often have superior performance. Therefore, the development of highly conductive flexible fibers has become a hot spot in the field of flexible devices. Graphene, as a single-layer two-dimensional carbon atom crystal, has extremely high electrical conductivity, thermal conductivity, and mechanical strength, and is regarded as the best material for assembling macroscopically highly conductive flexible hollow f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184
CPCC01B32/184
Inventor 韩文鹏龙云泽燕军祥宫赫李梦菲
Owner QINGDAO UNIV
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