Method for preparing carbon nanofiber non-woven fabric by coal hydroliquefaction residue base asphalt alkene substances

A technology of carbon nanofibers and liquefaction residues, which is applied in spinning solution preparation, non-woven fabrics, textiles and papermaking, etc., can solve the problems of carbon nanofiber non-woven fabrics that have not been reported, and can expand the scope of high value-added applications and simplify The effect of the preparation process

Active Publication Date: 2018-05-04
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there is no relevant report on the preparation of nano-carbon fiber non-woven fabrics by electrospinning using coal direct liquefaction residue (CLR)-based asphaltenes as carbon sources.

Method used

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  • Method for preparing carbon nanofiber non-woven fabric by coal hydroliquefaction residue base asphalt alkene substances
  • Method for preparing carbon nanofiber non-woven fabric by coal hydroliquefaction residue base asphalt alkene substances

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The obtained coal direct liquefaction residue is ground into 100-300 mesh powder, and n-hexane and tetrahydrofuran are used to sequentially extract the coal direct liquefaction residue to obtain the coal liquefaction residue n-hexane insoluble matter-tetrahydrofuran soluble matter solid (i.e. asphaltenes); Recorded as AP. Dissolve 1g of AP in 5g of tetrahydrofuran solution, denoted as solution A; dissolve 1g of polyacrylonitrile in 15g of N-N, dimethylformamide solution, denoted as solution B; mix the above two solutions A and B, stir magnetically The spinning stock solution was obtained after 1 h. The obtained spinning dope is spun through an electrospinning machine, the spinning voltage is 6Kv, the ambient humidity is 30%, the receiving distance is 5cm, and the advancing speed is 0.5ml / h to obtain a nascent non-woven fabric. The obtained nascent non-woven fabric was initially pre-oxidized in a 5wt% nitric acid solution for 0.5h, washed to neutrality, and dried; in an...

Embodiment 2

[0027] The obtained coal direct liquefaction residue is ground into 100-300 mesh powder, and n-hexane and tetrahydrofuran are used to sequentially extract the coal direct liquefaction residue to obtain the coal liquefaction residue n-hexane insoluble matter-tetrahydrofuran soluble matter solid (i.e. asphaltenes), Recorded as AP. Dissolve 0.5g AP in 20g tetrahydrofuran solution, denoted as solution A; dissolve 2g polyacrylonitrile in 10g N-N, dimethylformamide solution, denote solution B; mix the above two solutions A and B, magnetically The spinning stock solution was obtained after stirring for 24 h. The obtained spinning stock solution is spun through an electrospinning machine, the spinning voltage is 15Kv, the ambient humidity is 40%, the receiving distance is 10cm, and the advancing speed is 0.2ml / h to obtain a nascent nonwoven fabric. The obtained nascent non-woven fabric was initially pre-oxidized in a 10% nitric acid solution for 7 hours, washed to neutrality, and dri...

Embodiment 3

[0029] The obtained coal direct liquefaction residue is ground into 100-300 mesh powder, and n-hexane and tetrahydrofuran are used to sequentially extract the coal direct liquefaction residue to obtain the coal liquefaction residue n-hexane insoluble matter-tetrahydrofuran soluble matter solid (i.e. asphaltenes), Recorded as AP. Dissolve 10g AP in 20g tetrahydrofuran solution, denoted as solution A; dissolve 1g polyacrylonitrile in 5g N-N, dimethylformamide solution, denoted as solution B; mix the above two solutions A and B, stir magnetically After 18h, the spinning stock solution was obtained. The obtained spinning dope was spun through an electrospinning machine, the spinning voltage was 18Kv, the ambient humidity was 80%, the receiving distance was 20cm, and the advancing speed was 2.5ml / h. The obtained nascent non-woven fabric was initially pre-oxidized in a 70% nitric acid solution for 1 h, washed to neutrality, and dried; in an air atmosphere, the temperature was raise...

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Abstract

The invention discloses a method for preparing a carbon nanofiber non-woven fabric by coal hydroliquefaction residue base asphalt alkene substances. Coal hydroliquefaction residues are extracted sequentially by n-hexane and tetrahydrofuran to obtain asphalt base alkene substances, the asphalt base alkene substances are dissolved in tetrahydrofuran solvents, spinning additives are dissolved in N-N-dimethyl formamide solution, the solution is mixed, electrostatic spinning is performed at normal temperature to obtain a nascent fiber non-woven fabric, and the nascent fiber non-woven fabric is preoxidized and carbonized to obtain the carbon nanofiber non-woven fabric. The method has the advantages that high value-added application of the coal hydroliquefaction residues is enlarged, the preparation process of raw materials is simplified, and obtained carbon fibers are carbon nanofibers and have a certain self-supporting property.

Description

technical field [0001] The invention relates to a method for preparing carbon nanofiber non-woven fabrics by utilizing coal direct liquefaction residue-based asphaltene substances. Background technique [0002] Coal is my country's basic energy, accounting for 70% of the total primary energy production and consumption. With the rapid development of my country's economy, the production and consumption of traditional fossil energy such as coal and oil have seriously damaged the ecological environment. The efficient and clean development and utilization of coal resources, and the acceleration of the low-carbon development of the coal industry and the comprehensive utilization of coal resources are important for my country's coal industry. development is particularly important. Coal liquefaction technology is one of the effective ways to achieve clean and efficient utilization of coal resources, but direct coal liquefaction produces liquefaction residue (CLR), the main by-produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D1/02D06C7/04
CPCD01D1/02D04H1/728D06C7/04
Inventor 宋燕李肖贺怡婷刘文红刘占军
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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