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A polyacrylonitrile-based carbon fiber/polyaniline composite conductive fiber with core-sheath structure and preparation method thereof

A technology of polyacrylonitrile-based carbon fiber and polyacrylonitrile fiber, which is applied in the fields of carbon fiber, fiber processing, textile and paper making, etc., can solve the problems of poor comprehensive mechanical properties, poor solubility, restricting the industrial application of PANI, etc. The effect of collapse, cheap raw materials, and easy post-processing

Active Publication Date: 2020-11-27
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its chain rigidity and strong inter-chain interactions, polyaniline has extremely poor solubility and is almost insoluble in most commonly used organic solvents. It is difficult to process and shape by traditional methods, and its comprehensive mechanical properties are poor. The industrial application of PANI has become the biggest obstacle to its further promotion

Method used

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  • A polyacrylonitrile-based carbon fiber/polyaniline composite conductive fiber with core-sheath structure and preparation method thereof
  • A polyacrylonitrile-based carbon fiber/polyaniline composite conductive fiber with core-sheath structure and preparation method thereof
  • A polyacrylonitrile-based carbon fiber/polyaniline composite conductive fiber with core-sheath structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Dissolve 0.20g of polyacrylonitrile (PAN) in 1.5mL of N,N-dimethylformamide (DMF), and stir magnetically for 5 hours at room temperature. In order to ensure that the polyacrylonitrile is completely dissolved, you can Ultrasound was used to accelerate the dissolution of polyacrylonitrile, and finally a transparent yellowish solution was obtained. Measure 1mL of the prepared solution into a 1mL syringe, and control the spinning parameters (spinning voltage 15KV, spinning distance 20cm, spinning flow rate 0.6mL / h) for electrospinning to obtain polyacrylonitrile fibers with uniform diameter.

[0029] (2) Take the 120mg sample obtained in (1) and place it evenly in a 120*60mm porcelain boat, place it in a tube furnace, heat it to 280°C at a heating rate of 5°C / min, and keep it for 2h to obtain pre-oxidized polypropylene Nitrile. Take 90 mg of the obtained pre-oxidized polyacrylonitrile fiber in a tube furnace, under the protection of nitrogen, heat it to 850 °C at a hea...

Embodiment 2

[0032] (1) Dissolve 0.30g of polyacrylonitrile (PAN) in 2mL of N,N-dimethylformamide (DMF), and stir magnetically for 5 hours at room temperature. To ensure the complete dissolution of polyacrylonitrile, you can use Ultrasound is used to accelerate the dissolution of polyacrylonitrile, and finally a transparent yellowish solution is obtained. Measure 0.5mL of the prepared solution into a 1mL syringe, and control the spinning parameters (spinning voltage 20KV, spinning distance 20cm, spinning flow rate 0.6mL / h) for electrospinning to obtain polyacrylonitrile fibers with uniform diameter.

[0033] (2) Take the 100mg sample obtained in (1) and place it evenly in a 120*60mm porcelain boat, place it in a tube furnace, heat it to 270°C at a heating rate of 5°C / min, and keep it for 2h to obtain pre-oxidized polypropylene Nitrile. Take 80 mg of the obtained pre-oxidized polyacrylonitrile fiber in a tube furnace, under the protection of nitrogen, heat it to 800 °C at a heating rate of...

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Abstract

The invention discloses a PAN (polyacrylonitrile)-based carbon fiber / PANI (polyaniline) composite conductive fiber with a core-sheath structure and a preparation method of thePAN-based carbon fiber / PANI composite conductive fiber. The method comprises the following steps: (1), preparing a PAN fiber with uniform diameter and smooth surface from polymer PAN as a raw material with an electrostaticspinning method; (2), carbonization at high temperature, taking PAN as a precursor, and performing carbonization to obtain a PAN-based carbon fiber; (3), constructing the PAN-based carbon fiber / PANI composite conductive fiber with the core-sheath structure with the PAN-based carbon fiber as a template. The PAN-based carbon fiber is used as a good matrix material and has good electrical conductivity and chemical stability; PANI has good specific capacitance and undoping capability, excellent pseudocapacitance is provided for the composite conductive fiber, the synergistic effect of the two fibers is provided can be fully developed, and electrochemical performance of the material is improved.

Description

technical field [0001] The invention relates to a conductive polymer nanofiber, in particular to a polyacrylonitrile-based carbon fiber / polyaniline composite conductive fiber with a core-sheath structure and a preparation method thereof. Background technique [0002] As a simple and widely applicable method for preparing nanofibers, electrospinning has been intensively studied and widely used. By applying the electrospinning process and adjusting the corresponding spinning process parameters, uniform fibers with a diameter of several microns to several nanometers and a smooth surface can be prepared. Nanofibers have the characteristics of large specific surface area, high porosity, good permeability, and good connectivity of internal voids, and have potential applications in many fields. Among many conductive polymers, polyaniline (PANI) has been widely studied in the fields of secondary batteries, electromagnetic shielding, electrochromic materials, sensors, stealth materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/61D06M101/40
Inventor 许一婷何锴慰戴李宗吴章锋王宏超张丹丹闫蕾陈国荣曾碧榕袁丛辉罗伟昂
Owner XIAMEN UNIV
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