Glass carbon nanometer fiber preparation method

A nanofiber and glassy carbon technology, which is applied in fiber processing, fiber chemical characteristics, heating/cooling fabrics, etc., can solve problems that have not been reported yet, and achieve the effects of uniform diameter distribution, abundant output, and low pollution

Inactive Publication Date: 2013-02-20
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the glassy carbon materials prepared are block, sheet and film-like materials, but the preparation of ultrafine glassy carbon nanofibers with a diameter of only tens of nanometers has not been reported yet.

Method used

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  • Glass carbon nanometer fiber preparation method
  • Glass carbon nanometer fiber preparation method
  • Glass carbon nanometer fiber preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Dissolve 3 g of cellulose acetate in 17 g of acetone and N,N -In the mixed solvent of dimethylacetamide, be configured into the cellulose acetate spinning solution that mass fraction is 15%. of which acetone and N,N - The mass ratio of dimethylacetamide is 2:1.

[0023] 2. Transfer the cellulose acetate spinning dope to a 10 ml syringe, then fix the syringe on the syringe pump, control the temperature at 25 °C, humidity at 60%, electric field strength at 0.5 kV / cm, and feeding speed at 10 μL / min , and electrospun in an electrospinning device to obtain cellulose acetate nanofibers. The prepared cellulose acetate nanofibers were dried in a vacuum oven at 40 °C for 8 h.

[0024] 3. The cellulose acetate nanofibers were hydrolyzed in an ethanol solution containing 0.1 mol / L NaOH at 25°C for 24 h, then washed with distilled water until neutral, drained in the atmosphere for 8 h, and then vacuum-dried at 70°C for 12 h. Cellulose nanofibers are obtained.

[0025] 4. Th...

Embodiment 2

[0027] 1. Dissolve 5 g of cellulose acetate in 20 g of acetone and N,N -In the mixed solvent of dimethylacetamide, be configured into the cellulose acetate spinning solution that mass fraction is 20%. of which acetone and N,N - The mass ratio of dimethylacetamide is 2:1.

[0028] 2. Transfer the cellulose acetate spinning dope to a 10 ml syringe, then fix the syringe on the syringe pump, control the temperature at 30°C, humidity 70%, voltage 10 kV, needle tip diameter 1 mm, distance between the needle tip and the receiver 20 cm, the flow rate of the spinning solution was 15 μL / min, and electrospun in an electrospinning device to obtain cellulose acetate nanofibers. The cellulose acetate nanofibers were dried in a vacuum oven at 40 °C for 8 h.

[0029] 3. The cellulose acetate nanofibers were hydrolyzed in an ethanol solution containing 0.1 mol / L NaOH at 25 °C for 24 h, then washed with distilled water until neutral, drained in the atmosphere for 8 h, and then vacuum-dried a...

Embodiment 3

[0032] 1. Dissolve 2g of cellulose acetate in 18g of acetone and N,N -In the mixed solvent of dimethylacetamide, be configured into the cellulose acetate spinning solution that mass fraction is 10%. of which acetone and N,N - The mass ratio of dimethylacetamide is 2:1.

[0033] 2. Transfer the cellulose acetate spinning dope to a 10 ml syringe, then fix the syringe on the syringe pump, control the temperature at 20°C, humidity 80%, voltage 5 kV, needle tip diameter 1 mm, distance between the needle tip and the receiver 20 cm, the flow rate of the spinning solution was 5 μL / min, and electrospun in an electrospinning device to obtain cellulose acetate nanofibers. The cellulose acetate nanofibers were dried in a vacuum oven at 40 °C for 8 h.

[0034] 3. The cellulose acetate nanofibers were hydrolyzed in an ethanol solution containing 0.1 mol / L NaOH at 25 °C for 24 h, then washed with distilled water until neutral, drained in the atmosphere for 8 h, and then vacuum-dried at 70...

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Abstract

The present invention relates to the field of nanometer fibers, specifically to a glass carbon nanometer fiber preparation method, which is characterized by comprising: 1) adopting cellulose acetate as a precursor, adopting acetone and N,N-dimethylacetamide as a mixed solvent, carrying out magnetic stirring to prepare a spinning solution, and adopting an electrostatic spinning method to prepare cellulose acetate nanometer fibers; 2) carrying out hydrolysis on the cellulose acetate nanometer fibers for 24 h by using an ethanol solution containing 0.1 mol/L NaOH, washing with distilled water to achieve a neutral state, draining for 8 h under an atmospheric environment, and carrying out vacuum drying for 12 h at a temperature of 70 DEG C to obtain cellulose nanometer fibers; and 3) placing the cellulose nanometer fibers in a tube furnace to carry out a stabilization and carbonization treatment to obtain the glass carbon nanometer fibers. The preparation method has characteristics of low cost, low pollution and simple process. With the preparation method, diameter and morphology of the fibers can be controlled by adjusting composition of the spinning solution and electrospinning parameters, the prepared fibers have uniform diameter distribution, and the method is suitable for mass production.

Description

technical field [0001] The invention relates to the field of nanofibers, in particular to a method for preparing glassy carbon nanofibers. Background technique [0002] Glassy carbon is a kind of carbon material. Its cross-section has a luster like glass, and it has the characteristics of impermeability, high hardness, chemical corrosion resistance, good thermal conductivity, wear resistance and good biocompatibility. Glassy carbon has high stability to heat, oxidizing gases and acids, and its oxidation rate in oxygen, carbon dioxide and water vapor is lower than that of any other carbon; It will be reduced to powder in a mixed solution with nitric acid, while glassy carbon will not be affected for several months under the same conditions. These properties of glassy carbon make it widely used in the fields of electrochemical analysis, semiconductor industry, metallurgical industry and medical research. [0003] Glassy carbon is usually prepared by heat-treating thermosetti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/16D01D5/00D06C7/04
Inventor 刘海清王巧英刘瑞来
Owner FUJIAN NORMAL UNIV
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