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Porous graphene-carbon nanotube composite fiber and its rapid preparation method

A carbon nanotube composite and porous graphene technology, which is applied in fiber processing, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of high equipment requirements, complicated preparation process, long preparation cycle, etc., and achieve cost reduction and high process efficiency convenient effect

Active Publication Date: 2020-04-24
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the preparation method of the above process can obtain a large specific surface area, the preparation process is complicated, the equipment requirements are high, and the preparation cycle is long, so it is difficult to really promote the rapid preparation of graphene composite carbon nanotubes in large quantities in fiber supercapacitors.

Method used

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  • Porous graphene-carbon nanotube composite fiber and its rapid preparation method
  • Porous graphene-carbon nanotube composite fiber and its rapid preparation method
  • Porous graphene-carbon nanotube composite fiber and its rapid preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Mix the graphene oxide dispersion with a concentration of about 5 mg / ml and the carbon nanotube SDS aqueous dispersion with a concentration of about 0.1 mg / ml at a volume ratio of 1:1, ultrasonicate, and stir for 0.5 h;

[0053] (2) The solution prepared in step (1) is injected into 25°C through a syringe with a spinneret inner diameter of about 200 μm, and the mass concentration is 5% CaCl 2 In the coagulation bath, obtain fibrous composite fibers, and soak the fibers in the coagulation bath for 30 minutes;

[0054] (3) the molded fiber obtained in step (2) (see Figure 1a , Figure 1c ) was transferred to 35% HI acid, and chemically reduced at 90°C for 6h, then washed with water for 3 times, and vacuum-dried at 25°C for 3h;

[0055] (4) The fiber obtained in step (3) is fixed on a glass slide, and in the air, a DC voltage of 10V / cm is applied to both ends of the fiber for 5 seconds to finally obtain the expanded porous graphene-carbon nanotube composite fiber (s...

Embodiment 2

[0057] (1) Mix 5mg / ml graphene oxide dispersion with 0.2mg / ml carbon nanotube SDS aqueous dispersion at a volume ratio of 1:1, ultrasonicate, and stir for 0.5h;

[0058] (2) The solution prepared in step (1) is injected into a syringe with a spinneret inner diameter of about 200 μm to 25° C., and the mass concentration is 5% CaCl 2 In the coagulation bath, obtain the fibrous composite fiber, and make the fiber soak in the coagulation bath for 30 minutes;

[0059] (3) Transfer the molded fiber obtained in step (2) to 35% HI acid, and perform chemical reduction at 90°C for 6h, then wash it with water for 3 times, and dry it in vacuum at 25°C for 3h;

[0060] (4) The fiber obtained in step (3) is fixed on a glass slide, and in the air, a DC voltage of 10V / cm is applied to both ends of the fiber for 5 seconds to finally obtain an expanded porous graphene-carbon nanotube composite fiber.

Embodiment 3

[0062] (1) Mix 5mg / ml graphene oxide dispersion with 0.2mg / ml carbon nanotube SDS aqueous dispersion at a volume ratio of 1:1, ultrasonicate, and stir for 0.5h;

[0063] (2) The solution prepared in step (1) is injected into a syringe with a spinneret inner diameter of about 200 μm to 25° C., and the mass concentration is 5% CaCl 2 In the coagulation bath, obtain the fibrous composite fiber, and make the fiber soak in the coagulation bath for 30 minutes;

[0064] (3) Transfer the molded fiber obtained in step (2) to 35% HI acid, and perform chemical reduction at 90°C for 6h, then wash it with water for 3 times, and dry it in vacuum at 25°C for 3h;

[0065] (4) Fix the fiber obtained in step (3) on a glass slide, and place it in an inert atmosphere, and apply a DC voltage of 15V / cm to both ends of the fiber for 5 seconds to finally obtain expanded porous graphene-carbon nanotube composite fibers.

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Abstract

The invention discloses a porous graphene-carbon nanotube composite fiber and a rapid preparation method thereof. The rapid preparation method includes: providing graphene-carbon nanotube composite fibers; and quickly applying a voltage on the graphene-carbon nanotube composite fibers, so that the graphene-carbon nanotube composite fibers expand rapidly, so that the graphene-carbon nanotube composite fibers A three-dimensional porous structure is formed inside to form porous graphene-carbon nanotube composite fibers. The process of the present invention is simple and easy to implement. It only needs to quickly load a voltage on the graphene-carbon nanotube composite fiber to instantly form a three-dimensional porous structure inside the composite fiber, which has high efficiency and low cost.

Description

technical field [0001] The invention relates to a method for rapidly preparing porous graphene-carbon nanotube composite fibers, and belongs to the technical field of nanoporous material preparation. Background technique [0002] With the increasing demand for portable, flexible and wearable electronic devices, the demand for lightweight, high-capacity, and flexible energy storage devices that match these electronic devices has also become the focus of attention. However, traditional energy storage devices have disadvantages such as large volume, slow charging and discharging speed, and lack of flexibility, which greatly limit the development of wearable electronic devices. In order to solve the above problems, people are constantly developing new materials with flexibility, weaving and high energy storage as electrodes of energy storage devices. Supercapacitor is an electrochemical energy storage device, which mainly utilizes the electric double layer capacitance formed be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M10/00D01F9/12
CPCD01F9/12D06M10/00
Inventor 张永毅相喜赵威李清文
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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