Preparation method for PVC-based carbon nanofiber

A technology of carbon nanofibers and nitrogen nitrogen dimethylformamide, which is applied in fiber processing, fiber chemical characteristics, textiles and papermaking, etc., can solve the problem of small hydrogen absorption, difficulty in determining the hydrogen absorption position, and difficulty in making suitable microstructures. Problems such as pore volume, shape and material, to achieve the effect of easy operation, easy recovery, and simple equipment

Active Publication Date: 2013-11-27
FUJIAN NORMAL UNIV
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  • Application Information

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Problems solved by technology

[0003] Carbon-based materials are insensitive to a small amount of gaseous impurities and can be used repeatedly. The storage container is light in weight, has a large choice of shape and high storage efficiency, but its hydrogen absorption capacity is small, and it is difficult to prepare materials with suitable micropore volume and shape. Difficult to determine the location of hydrogen absorption, etc.

Method used

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  • Preparation method for PVC-based carbon nanofiber
  • Preparation method for PVC-based carbon nanofiber
  • Preparation method for PVC-based carbon nanofiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation of electrospinning solution: Mix 1.4g PVC (K value 72-71), 0.0560g nickel chloride and 18.6mL nitrodimethylformamide, and stir for a period of time at 50 °C to form a uniform spinning liquid.

[0032] 2. Through electrospinning equipment, under the conditions of voltage 25KV, feeding flow rate of spinning solution 0.6mL / h, and electrospinning temperature 35℃, spinning solution electrospinning to prepare PVC / NiCl 2 Composite nanofiber precursors.

[0033] 3. The prepared PVC / NiCl 2 The composite nanofiber precursors were dried in an oven (temperature 50 °C) for 8 h.

[0034] 4. PVC / NiCl after drying 2 The composite nanofiber precursors were treated with iodine vapor under vacuum and 80°C for 48h.

[0035] 5. After the above iodine pretreatment, the nanofibers were calcined in a muffle furnace at 320 °C for 1 h

[0036] 6. The pre-oxidized nanofibers were calcined in a tube furnace at a nitrogen flow rate of 300ml / min at 2°C / min to 1000°C for 1 hour t...

Embodiment 2

[0039] 1. Preparation of electrospinning solution: Mix 1.4g PVC (K value 72-71), 0.0560g nickel chloride and 18.6mL nitrodimethylformamide, and stir for a period of time at 50 °C to form a uniform spinning liquid.

[0040] 2. Through electrospinning equipment, under the conditions of voltage 25KV, feeding flow rate of spinning solution 0.6mL / h, and electrospinning temperature 35℃, spinning solution electrospinning to prepare PVC / NiCl 2 Composite nanofiber precursors.

[0041] 3. The prepared PVC / NiCl 2 The composite nanofiber precursors were dried in an oven (temperature 50 °C) for 8 h.

[0042] 4. PVC / NiCl after drying 2 The composite nanofiber precursors were treated in alkaline solution (6.25mol / L sodium hydroxide, 0.037mol / L tetrabutylammonium bromide) at 70°C for 24h.

[0043] 5. The nanofibers were calcined in a muffle furnace at 260 °C for 3 h after the above alkali pretreatment.

[0044] 6. The pre-oxidized nanofibers were calcined in a tube furnace at a nitrogen...

Embodiment 3

[0046] 1. Preparation of electrospinning solution: Mix 1.4g PVC (K value 72-71), 0.0560g nickel acetate and 18.6mL nitrodimethylformamide, and stir for a period of time at 50°C to form a uniform spinning solution .

[0047] 2. Through electrospinning equipment, under the conditions of voltage 25KV, feeding flow rate of spinning solution 0.6mL / h, and electrospinning temperature 35℃, spinning solution electrospinning to prepare PVC / (CH) 3 COO) 2 Ni composite nanofiber precursors.

[0048] 3. The prepared PVC / (CH 3 COO) 2 The Ni composite nanofiber precursors were dried in an oven (temperature 50 °C) for 8 h.

[0049] 4. PVC / (CH after drying 3 COO) 2 The precursors of Ni composite nanofibers were treated with iodine vapor at 80 °C for 48 h in vacuum.

[0050] 5. After the above iodine pretreatment, the nanofibers were calcined in a muffle furnace at 320 °C for 1 h.

[0051] 6. The above pre-oxidized nanofibers are calcined in a tube furnace at a nitrogen flow rate of 300ml / ...

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Abstract

The invention related to a preparation method for carbon nanofiber. The preparation method is characterized in that: PVC and a catalyst precursor are mixed firstly by using an organic solvent, stirred at 40-50 DEG C to prepare a uniform electrostatic spinning solution; a PVC-based carbon nanofiber precursor is prepared from the spinning solution through an electrostatic spinning device; the PVC-based carbon nanofiber precursor is dried in a drying case, and the dried PVC-based carbon nanofiber precursor is subjected to iodine vapor treatment or alkaline liquor treatment to remove hydrogen chloride, and then the PVC-based carbon nanofiber precursor is put into a muffle furnace to perform preoxidation in an air environment and is forged into the PVC-based carbon nanofiber in a tube furnace under a condition of piping in inert gas continuously. By utilization of the method, resource reuse of the PVC can be achieved with simple equipment and easy operation, and large-scale preparation can be achieved. The PVC-based carbon nanofiber has a large specific surface area. The PVC-based carbon nanofiber is prone to recycle and can be reutilized. The PVC-based carbon nanofiber is suitable for applications in the fields of hydrogen storage, fuel cells, lithium ion batteries, and the like.

Description

technical field [0001] The invention relates to a method for preparing carbon nanofibers, in particular to a method for preparing PVC-based carbon nanofibers that can be used for hydrogen storage, lithium ion batteries, fuel cells and the like. Background technique [0002] Hydrogen is a clean fuel, and hydrogen energy is one of the promising new energy sources in the future. The storage of hydrogen is the bottleneck of the current development and utilization of hydrogen energy. There are three storage methods for hydrogen: high-pressure gas storage, low-temperature liquid storage, and solid-state storage. Among them, high-pressure gas storage or low-temperature liquid storage cannot meet the future hydrogen storage goals. Solid-state hydrogen storage is the storage of hydrogen in solid-state materials through chemical or physical adsorption. It has high energy density and good safety, and is considered to be the most promising hydrogen storage method. [0003] Carbon-base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/21D01D5/00
Inventor 钱庆荣魏薇陈庆华黄宝铨肖荔人许兢刘欣萍
Owner FUJIAN NORMAL UNIV
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