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Preparation method of graphene coated electric-conductive fiber

A technology of conductive fiber and graphene, which is applied in the direction of carbon fiber, fiber treatment, natural fiber, etc., can solve the problems of uneven carbon black coating, easy to fall off, etc., and achieve the effect of improved conductivity, not easy to fall off, and easy to operate

Inactive Publication Date: 2018-07-27
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of graphene-coated conductive fiber, by coating graphene evenly on the surface of the fiber, utilizing the high conductivity of graphene, endowing the fiber material with conductivity, and solving the problem of preparing conductive fibers by the current carbon-coating method. The carbon black coating that exists in the fiber is uneven and easy to fall off; the method is simple and suitable for large-scale production

Method used

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  • Preparation method of graphene coated electric-conductive fiber
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  • Preparation method of graphene coated electric-conductive fiber

Examples

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preparation example Construction

[0039] 1. Preparation of Graphene Hydrosol

[0040] Add graphite oxide or graphene oxide into deionized water at 1-5 mg / ml, and ultrasonically disperse for 15-30 minutes to obtain a stable and uniform graphene oxide aqueous solution. 0.5-1.5wt% of 80wt% hydrazine hydrate solution with a concentration of 80wt% is added dropwise to the graphene oxide solution, stirred evenly and then heated at 50° C. for 4 hours to obtain graphene hydrosol.

[0041]2. Preparation of graphene-coated conductive fibers

[0042] The dipping and pulling device used in the present invention is as figure 1 As shown, the technical parameters are as follows: the specifications of the fixed pulley I / II / III can be the same or different, and the diameter must be greater than 3cm; the liquid level of the graphene hydrosol in the liquid tank must be higher than the rotation axis of the fixed pulley II; The distance between Ⅱ and fixed pulley Ⅲ should be kept vertical, the angle between the tangent between f...

Embodiment 1

[0047] Take 200mg of graphite oxide, add it into 200ml of deionized water, and ultrasonically disperse for 20min to obtain an aqueous solution of graphene oxide. Add 2ml of hydrazine hydrate aqueous solution with a concentration of 80wt% dropwise to the graphene oxide aqueous solution, stir evenly and place it in a 50°C oven for heating for 4h, pour the obtained graphene hydrosol into figure 1 in the liquid tank.

[0048] fiberglass as figure 1 As shown in the arrangement, the fiber is pulled at a speed of 0.3m / s. After dipping and pulling, it is dried at 60°C for 1 hour to obtain a graphene-coated conductive glass fiber. The scanning electron microscope photo is as follows image 3 As shown, the graphene-coated conductive glass fiber prepared by this method has a diameter of about 23.6 μm and a volume conductivity of about 0.11 S / cm.

Embodiment 2

[0050] The difference from Example 1 is that the glass fiber is dipped and pulled 3 times to obtain a graphene-coated conductive glass fiber, and the scanning electron microscope photo is as follows: Figure 4 As shown, the graphene-coated conductive glass fiber prepared by this method has a diameter of about 25.5 μm and a volume conductivity of about 1.5 S / cm.

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Abstract

The invention belongs to the technical field of carbon material and composite materials and particularly provides a preparation method of a graphene coated electric-conductive fiber. The method includes the steps of: 1) reducing graphene oxide into a graphene hydrosol as a precursor and performing impregnation dip-coating process to uniformly coating the fiber with graphene, which can be repeatedfor several times; 2) drying the fiber so that the surface of the fiber is coated with a complete and continuous graphene thin film, thus producing the graphene coated electric-conductive fiber. Meanwhile, when the sol is dried and dehydrated, the sol is shrunk, so that the compression generated during the shrinking process can tightly press the graphene coating layer onto the surface of the fiber, and the graphene is tightly combined with the fiber and is not liable to fall off. On the surface of the fiber, the lamellas of graphene are overlapped and communicated to form the electric-conductive coating layer, thus significantly improving electric-conductivity of fibers. The fiber composite material has excellent conductivity, can be used for eliminating static electricity and electromagnetic shielding and has great application prospect. The preparation method has simple processes and is controllable in product performance, and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the research field of carbon materials and composite materials, in particular to a preparation method of graphene-coated conductive fibers. Background technique [0002] With the development of industrial production, static electricity and electromagnetic radiation have brought many negative effects on the normal operation of electronic equipment and human physiological health. Due to the remarkable antistatic effect of conductive fibers, and when the conductivity reaches a certain level, they have excellent electromagnetic shielding functions, the development and application of conductive fibers have attracted more and more attention. [0003] The coating method is a method of preparing conductive fibers, and the common method is to coat carbon black on the surface of ordinary fibers. The coating method can use adhesives to bond carbon black to the fiber surface, or directly soften the fiber surface quickly and bond with carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74C03C25/44D06M101/40D06M101/02D06M101/16
CPCC03C25/44D06M11/74D06M2101/02D06M2101/16D06M2101/40
Inventor 曾尤方明赫郝亚斌王超逸
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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