Preparation method of nanometer carbon fiber material containing iron oxide

A technology of carbon nanofibers and iron oxides, applied in the field of materials, can solve the problems of affecting the dielectric constant, decline in performance, poor reactivity, etc., and achieve the effects of improving performance, improving spinnability, and reducing costs

Inactive Publication Date: 2012-08-15
李翠花
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method cannot produce carbon nanofibers only with lignin, which only accounts for 25%
Moreover, due to the use of ordinary alkaline lignin, which contains more inorganic salt ash, especially non-wood alkali lignin, the ash will be mixed into the fiber during the spinning process, which will eventually affect the purity of carbon nanofibers, and then affect its dielectric constant. leading to a decrease in its performance
[0006] Although the preparation technology of plant-based carbon nanofibers can significantly reduce the cost of carbon nanofibers, due to the poor reactivity of natural macromolecules such as lignin, lignin macromolecules cannot directly replace traditional resources to prepare carbon fibers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take by weighing 20g of the masson pine lignin obtained by sulfite method cooking, dissolve in the solution of 100mL of tetrahydrofuran and fully dissolve, then remove mechanical impurities with a 60 mesh filter, add 200ml of distilled water to the filtrate to separate out the lignin, then filter, The lignin was washed with distilled water until the pH was 6, and the lignin was dried in a drying oven at -50°C for 10 hours. The lignin was taken out and pulverized with a plant pulverizer, and the powder was stored in a desiccator.

[0023] Add 10g of purified lignin powder, 10g of polyvinyl alcohol, and 50g of iron acetylacetonate to a 500ml reagent bottle, then add 100g of 1,4-dioxane to the reagent bottle, seal the glass bottle, and shake repeatedly until The solute is completely dissolved to obtain a spinning solution.

[0024] The spinning solution was placed in the liquid storage container of the high-voltage electrospinning device, and was output from the container ...

Embodiment 2

[0027] Weigh 15g of poplar lignin obtained by alkaline cooking, dissolve it in 500mL of dimethyl sulfoxide and acetone solution, and then use a 160-mesh filter to remove mechanical impurities, add 1200ml of distilled water to the filtrate to precipitate the lignin , and then filtered, the lignin was washed with distilled water to pH 7, the lignin was dried in a drying oven at 50°C for 6 hours, the lignin was taken out and pulverized with a plant pulverizer, and the powder was stored in a desiccator.

[0028] Get 10g of purified lignin powder, 2g of polyacrylonitrile, and 30g of iron acetylacetonate and add them to a 500ml reagent bottle, then add 100g of hexafluoroisopropanol and 1,4-dioxane mixed solution to the reagent bottle, and put the glass The bottle is sealed and shaken repeatedly until the solute is completely dissolved to obtain a spinning solution.

[0029] The spinning solution was placed in the liquid storage container of the high-voltage electrospinning device, a...

Embodiment 3

[0032] Weigh 20g of spruce lignin obtained by kraft cooking, dissolve it in 200mL of chloroform solution and dissolve it fully, then use a 120 mesh filter to remove mechanical impurities, add 400ml of distilled water to the filtrate to precipitate lignin, then filter, lignin Wash the lignin with distilled water until the pH is 7, put the lignin in a drying oven at -30°C and dry it for 10 hours, take out the lignin and pulverize it with a plant pulverizer, and store the powder in a desiccator.

[0033] Get the lignin powder of 15g purification, 8g polyacrylate, 5g iron acetylacetonate and add in the reagent bottle of 500ml, then add the dichloromethane of 100g to reagent bottle, glass bottle is sealed, shake repeatedly, until solute dissolves completely, obtain spinning solution.

[0034] The spinning solution was placed in the liquid storage container of the high-voltage electrospinning device, and was output from the container to the feeding needle of the high-voltage electro...

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Abstract

The invention relates to a preparation method of a nanometer carbon fiber material containing iron oxides, which is characterized in that wood fiber resources are used as raw materials, and the method comprises the following steps: extracting lignin from wood fibers by a boiling process, removing impurities in the lignin by an organic solvent extraction method, mixing the purified lignin, high-molecular polymer, the organic solvent, and ferric acetylacetonate and dissolving, continuously injecting the mixed solution into a high pressure electrostatic spinning device, performing spinning to obtain nanometer fibers, finally preoxidizing the obtained nanometer fibers in air, and performing high temperature carbonization in the presence of protective gas to obtain the C / Fe3O4 nanometer fibers. The invention has cheap and easily available raw materials, a simple preparation process, easy operations, and good repeatability, and is easy to realize large scale production.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a preparation method of nano-carbon fiber materials containing iron oxides. Background technique [0002] Carbon nanofibers are quasi-one-dimensional carbon materials with a diameter between carbon nanotubes and ordinary carbon fibers. Generally speaking, carbon nanofibers have a diameter of about 50-200 nm. Because of its high strength and Young's modulus, good electrical conductivity, thermal conductivity and thermal stability, excellent surface size effect, etc., corrosion resistance and fatigue resistance, etc., carbon nanofiber has been greatly favored by people. s concern. [0003] Although carbon nanofiber is an important engineering material, its high cost limits its application. At present, there are three main commercial-grade precursor materials for carbon nanofibers: pitch (petroleum or coal), rayon, and polyacrylonitrile, among which polyacrylonitrile is an excellent precu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/17D01F9/22D01F9/21D01F1/10D01D5/00C08H7/00
CPCD01F9/17D01D1/02D01D5/003D01F1/10D01F9/21
Inventor 陈洪章于彬王岚冯玉
Owner 李翠花
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