Preparing method for oriented graphene oxide fibers

A graphene fiber, graphene technology, applied in the chemical characteristics of fibers, wet spinning, textiles and papermaking, etc., can solve the problems of limiting practical application, difficult to expand the industrial level, etc., to strengthen the role between layers, high mechanical properties , the effect of increasing the slice size

Inactive Publication Date: 2016-05-25
YANCHENG ZENGCAI SCI & TECH
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Problems solved by technology

[0004] In order to further improve the fiber performance, many studies have taken improving the orientation degree of the fiber as a way, such as rotating the coagulation liquid during the spinning process, so that the fiber is stretched by the solution during the forming process, thereby exerting a certain stretching effect on the fiber. , or using templates to prepare highly oriented graphene oxide (GO) fibers by one-step hydrothermal method, but it is difficult to expand to the industrial level, which limits its practical application

Method used

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  • Preparing method for oriented graphene oxide fibers
  • Preparing method for oriented graphene oxide fibers
  • Preparing method for oriented graphene oxide fibers

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Embodiment 1

[0026] The preparation method of the oriented graphene oxide fiber comprises the following steps: preparing graphene oxide with flake graphite as a raw material, and configuring the graphene oxide spinning liquid; flowing the graphene oxide spinning liquid into the coagulation liquid through the wet spinning method, and preparing The raw gel graphene oxide fiber is produced; at a certain temperature, the graphene oxide fiber is radially stretched and dried to obtain the product.

[0027] Preparation of graphene oxide: Weigh 5g of 300μm expandable natural flake graphite, add 200mL of concentrated sulfuric acid and 50mL of fuming nitric acid, stir at room temperature for 24h, then slowly pour the mixture into 2L of deionized water, use a diameter of 90mm, the aperture Suction filter through a 0.2um cellulose membrane, wash twice with deionized water, and dry at 60°C for 24h after washing. The dried graphite was expanded at a high temperature of 1000° C. for 30 seconds to obtain ...

Embodiment 2

[0035] The difference between the preparation method of the oriented graphene oxide fiber of this embodiment and Example 1 is: (1) the graphene oxide preparation step also includes the graphene oxide solution prepared by freeze-drying for 5 days to prepare Solid graphene oxide. (2) Preparation of spinning solution: disperse solid graphene oxide in DMF solution as a solvent, and ultrasonicate for 15 minutes to obtain a 10 mg / ml graphene oxide solution, that is, obtain a uniformly dispersed graphene oxide spinning solution. The rest are the same as the preparation method of Example 1, and will not be repeated here.

Embodiment 3

[0037] Preparation of graphene oxide: The difference from Example 1 is that expandable natural flake graphite with a sheet size of 500 μm is selected as a raw material to prepare graphene oxide, and the rest is the same as the preparation of graphene oxide in Example 1.

[0038] Preparation of spinning solution: Take 200ml of the prepared graphene oxide solution, put it in an oil bath at 50°C, stir and concentrate, and obtain a graphene oxide spinning solution with a concentration of 5mg / ml.

[0039]Preparation of coagulation solution: prepare a 5% ethylenediamine aqueous solution as the coagulation solution.

[0040] Preparation of native graphene oxide fibers: use a mechanical syringe pump, select a spinning needle with an inner diameter of 0.43mm, push the syringe through the syringe pump, inject the spinning solution into the coagulation solution at a speed of 0.3ml / min, and form native graphene oxide fiber.

[0041] Preparation of oriented graphene oxide fibers: the prep...

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Abstract

The invention belongs to the technical field of preparation of graphene fiber materials and particularly relates to a preparing method for oriented graphene oxide fibers. The preparing method comprises the following steps that graphene oxide is prepared with lamellar graphene as a raw material, and a graphene oxide spinning solution is prepared; with a wet spinning method, the graphene oxide spinning solution flows into a solidifying solution, and primary graphene oxide fibers are prepared; at a certain temperature, the graphene oxide fibers are subjected to radial stretching and drying, and the oriented graphene oxide fibers are obtained. The preparing method is easy to implement and low in cost, the stretching rate of the fibers can be precisely controlled, and a good stretching effect can be achieved. The oriented graphene oxide fibers prepared through the method are significantly improved on the aspect of tensile strength compared with the primary graphene oxide fibers, a simple and effective method is provided for preparing high-performance fiber materials based on graphene, and the application of the graphene fibers in practical production and living can be promoted.

Description

technical field [0001] The invention relates to a preparation method of oriented graphene oxide fibers, belonging to the technical field of preparation of graphene fiber materials. Background technique [0002] Graphene, as a new type of two-dimensional material, has been widely concerned since it was discovered in 2004. Single-layer or multi-layer graphene prepared by CVD or epitaxial growth has excellent mechanical, electrical, and thermal properties, making it widely used in structural materials, energy storage devices, electronic devices, and sensors. . [0003] With the continuous development of the times, various fiber materials have become indispensable elements in people's production and life. How to assemble graphene sheets into macroscopic one-dimensional fiber materials and realize the practical application of graphene is an important issue now. Stages of challenges that people need to face. Based on this, research work on graphene fiber materials has been carr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/12D01D5/06
CPCD01D5/06D01F9/12
Inventor 闵永刚赵春燕曾文进冯亚飞苑春秋童宋照
Owner YANCHENG ZENGCAI SCI & TECH
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