Fe3C-containing hollow composite carbon fiber with carbon nanotubes growing on inner and outer surfaces and preparation method of Fe3C-containing hollow composite carbon fiber

A technology of compounding carbon fibers and carbon nanotubes, applied in the directions of carbon fiber, fiber processing, fiber chemical characteristics, etc., can solve problems such as poor electromagnetic shielding efficiency, and achieve the effect of enhancing dielectric loss

Active Publication Date: 2019-09-13
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0004] The present invention is to solve the technical problem of poor electromagnetic shielding efficiency of the existing carbon fiber and carbon nanotube composite materials, and to provide a carbon nanotube containing Fe 3 The hollow composite carbon fiber of C and its preparation method

Method used

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  • Fe3C-containing hollow composite carbon fiber with carbon nanotubes growing on inner and outer surfaces and preparation method of Fe3C-containing hollow composite carbon fiber
  • Fe3C-containing hollow composite carbon fiber with carbon nanotubes growing on inner and outer surfaces and preparation method of Fe3C-containing hollow composite carbon fiber
  • Fe3C-containing hollow composite carbon fiber with carbon nanotubes growing on inner and outer surfaces and preparation method of Fe3C-containing hollow composite carbon fiber

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specific Embodiment approach 1

[0026] Specific implementation mode one: the inner and outer surfaces of the present embodiment grow carbon nanotubes containing Fe 3 The hollow composite carbon fiber of C, its structure is based on the magnetic Fe 3 The carbonized fiber hollow tube of the C nanoparticle is used as a carrier, and carbon nanotubes are grown on the inner and outer surfaces of the hollow tube.

specific Embodiment approach 2

[0027] Specific implementation mode two: the inner and outer surfaces of the present embodiment grow carbon nanotubes containing Fe 3 The preparation method of the hollow composite carbon fiber of C, carries out according to the following steps:

[0028] 1. Preparation of Fe 3 o 4 -PAN / PMMA hollow fiber:

[0029] a. Fe 3 o 4 Nanoparticles dispersed in DMSO to obtain Fe 3 o 4 Nanoparticle dispersion; adding polyacrylonitrile to DMSO and heating to dissolve to obtain a polyacrylonitrile solution; adding Fe 3 o 4 mixing the nanoparticle dispersion with the polyacrylonitrile solution to obtain a mixed solution; evaporating part of the solvent under reduced pressure to obtain a shell solution;

[0030] B, prepare the DMSO solution of polymethyl methacrylate (PMMA), obtain core layer solution;

[0031] c. Using DMSO aqueous solution as the coagulation bath, pass the core solution into the central cavity of the dual-channel coaxial spinneret of the spinning machine, and pass...

specific Embodiment approach 3

[0038] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the magnetic Fe in step one 3 o 4 The preparation method of nanoparticles is as follows: 1.35~2.7g FeCl 3 ·6H 2 O. Mix 3.6-7.2g of anhydrous sodium acetate, 0-1g of polyethylene glycol and 80ml of ethylene glycol, stir thoroughly with ultrasonic waves, put it into a polytetrafluoroethylene reactor, and react at 190-210°C for 8-10 hours. Then cleaned with ethanol and dried in a vacuum oven to obtain magnetic Fe 3 o 4 Nanoparticles. Others are the same as in the second embodiment.

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Abstract

The invention discloses Fe3C-containing hollow composite carbon fiber with carbon nanotubes growing on inner and outer surfaces and a preparation method of the Fe3C-containing hollow composite carbonfiber, relates to a hollow fiber shielding material and a preparation method thereof, and aims to solve the technical problem that the existing carbon fiber and carbon nanotube composite material arepoor in electromagnetic shielding efficiency. The Fe3C-containing hollow composite carbon fiber with the carbon nanotubes growing on the inner and outer surfaces adopts a structure as follows: a carbonized fiber hollow tube containing magnetic Fe3C nanoparticles is used as a carrier, and the carbon nanotubes grow on the inner and outer surfaces of the hollow tube. The preparation method comprisesthe following steps: 1, preparing Fe3O4-PAN / PMMA hollow fibers; 2, growing the carbon nanotubes on the inner and outer surfaces of the Fe3O4-PAN hollow fiber. The Fe3C-containing hollow composite carbon fiber with the carbon nanotubes growing on the inner and outer surfaces has the electromagnetic shielding efficiency capable of reaching 80dB, and can be applied to the field of electromagnetic shielding.

Description

technical field [0001] The invention relates to a hollow fiber shielding material and a preparation method thereof. Background technique [0002] At present, electromagnetic pollution has become the fifth largest pollution source after air pollution, water pollution, noise pollution, and soil pollution, and it has a tendency to endanger physical and mental health. Different from other pollutants, air, water, noise, and soil pollution are all visible, traceable, and directly observable, and people can fully understand the harm of these pollutions, but electromagnetic radiation is nowhere to be found. Yes, it is a kind of energy pollution, and the pollution to the environment is relatively hidden. In daily life, when the intensity of electromagnetic radiation exceeds the limit value of safety and health standards, it will have negative effects on the human body, such as headaches, insomnia and other symptoms. The harm of electromagnetic radiation has become the focus of heal...

Claims

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Application Information

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IPC IPC(8): D01F9/22D01F1/10D06M11/74D06M101/40
CPCD01F9/22D01F1/10D06M11/74D06M2101/40
Inventor 姜再兴韦华伟黄玉东
Owner HARBIN INST OF TECH
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