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Method for preparing non-woven fabrics using coal direct liquefaction residue-based asphaltenes

A technology of liquefying residue and base asphaltene, which is applied in spinning solution preparation, non-woven fabrics, textiles and papermaking, etc., can solve the problems of carbon nano-fiber non-woven fabrics that have not been reported, and achieve the expansion of high value-added application range, The effect of simplifying the preparation process

Active Publication Date: 2020-06-30
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 non-woven fabrics using coal direct liquefaction residue-based asphaltenes
  • Method for preparing non-woven fabrics using coal direct liquefaction residue-based asphaltenes

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Grinding the obtained coal direct liquefaction residue into 100-300 mesh powder, and sequentially extracting the coal direct liquefaction residue with n-hexane and tetrahydrofuran to obtain the coal liquefaction residue n-hexane insoluble matter-tetrahydrofuran soluble matter solid (ie asphaltenes); Recorded as AP. Dissolve 1g AP in 5g tetrahydrofuran solution, and record it as solution A; dissolve 1g polyacrylonitrile in 15g N-N, dimethylformamide solution, record it as solution B; mix the above two solutions of A and B, and magnetically stir After 1 h, the spinning dope was obtained. The obtained spinning stock solution is spun by an electrospinning machine, the spinning voltage is 6Kv, the ambient humidity is 30%, the receiving distance is 5cm, and the propulsion speed is 0.5ml / h to obtain a nascent nonwoven fabric. After the initial pre-oxidation of the obtained nascent non-woven fabric in 5wt% nitric acid solution for 0.5h, it was washed to neutral and dried; unde...

Embodiment 2

[0027] Grinding the obtained coal direct liquefaction residue into 100-300 mesh powder, and sequentially extracting the coal direct liquefaction residue with n-hexane and tetrahydrofuran 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, and record it as solution A; dissolve 2g polyacrylonitrile in 10g N-N, dimethylformamide solution, and record it as solution B; mix the above two solutions of A and B, and magnetically After stirring for 24 hours, the spinning dope was obtained. The obtained spinning stock solution is spun by an electrospinning machine, the spinning voltage is 15Kv, the ambient humidity is 40%, the receiving distance is 10cm, and the propulsion speed is 0.2ml / h to obtain a nascent nonwoven fabric. The obtained nascent non-woven fabric was initially pre-oxidized in 10% nitric acid solution for 7 hours, washed to neutrality, ...

Embodiment 3

[0029] Grinding the obtained coal direct liquefaction residue into 100-300 mesh powder, and sequentially extracting the coal direct liquefaction residue with n-hexane and tetrahydrofuran 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, and record it as solution A; dissolve 1g polyacrylonitrile in 5g N-N, dimethylformamide solution, and record it as solution B; mix the above two solutions of A and B, and magnetically stir After 18h, the spinning dope was obtained. The obtained spinning stock solution was spun by 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. After the initial pre-oxidation of the obtained nascent non-woven fabric in 70% nitric acid solution for 1 hour, it was washed until neutral and dried; in an air atmosphere, t...

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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 nano-carbon fiber non-woven fabrics by using coal direct liquefaction residue-based asphaltenes. Background technique [0002] Coal is the basic energy of our country, 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, the acceleration of the low-carbon development of the coal industry and the comprehensive utilization of coal resources are crucial to my country's coal industry. development is particularly important. Coal liquefaction technology is one of the effective ways to realize the clean and efficient utilization of coal resources. However, while direct coal liquefaction obtains liquid fuel, it also produces a main by-produc...

Claims

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Application Information

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Patent Type & Authority Patents(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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