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Aramid 1313/MWCNT (Multi-Walled Carbon Nanotube) nano fibers and preparation method thereof

A multi-walled carbon nanotube and nanofiber technology, applied in fiber processing, filament/thread forming, single-component polyamide rayon, etc. Effect

Inactive Publication Date: 2013-01-16
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on how to construct aramid 1313 / CNTs nanofibers

Method used

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  • Aramid 1313/MWCNT (Multi-Walled Carbon Nanotube) nano fibers and preparation method thereof
  • Aramid 1313/MWCNT (Multi-Walled Carbon Nanotube) nano fibers and preparation method thereof
  • Aramid 1313/MWCNT (Multi-Walled Carbon Nanotube) nano fibers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Use a mixed acid solution composed of 65% nitric acid and 95% sulfuric acid to ultrasonically oxidize MWNTs, centrifuge the mixed acid solution containing MWNTs, separate MWNTs from the acid solution, and wash MWNTs repeatedly with deionized water , until the pH value of the cleaning solution is 7, and dry the pretreated MWNTs at 90°C. Weigh a certain amount of treated carbon nanotubes and add to SOCl 2 and DMF mixed solution (MWNTs: SOCl 2:DMF=0.2g:30ml:3ml), magnetically stirred at 65°C for 24h, centrifuged to separate MWNTs from the mixed solution, rinsed with THF, and then air-dried in a fume hood to obtain MWNTs-COCl. Then add MWNTs-COCl to the mixed solution of TritonX-100 and DMF (MWNTs-COCl:TritonX-100:DMF=0.2g:20ml:40ml), and pass into N 2 protection, stirred at 120°C for 48 hours, and then centrifuged the mixed solution, rinsed the separated MWNTs with DMF, and then air-dried in a fume hood to obtain MWNTs grafted with TritonX-100. A certain amou...

Embodiment 2

[0040] Example 2: A certain amount of MWNTs grafted with TritonX-100 was weighed, added to DMAc solvent, and treated with ultrasonic waves for 30 minutes to obtain MWNTs / DMAc solution.

[0041] Weigh a certain amount of anhydrous LiCl, dry it in vacuum at 120°C for 2 hours, then add it to DMAc to form a LiCl / DMAc solution system, weigh a certain amount of aramid 1313 fiber, add it to the LiCl / DMAc solution system, and heat it at 100°C Dissolve under stirring to form a transparent solution.

[0042] The MWNTs / DMAc solution and the aramid fiber 1313 / LiCl / DMAc solution were stirred and mixed for 30 minutes to prepare a mixed solution with a mass fraction of aramid fiber 1313 of 11%, a mass fraction of LiCl of 7wt%, and a mass fraction of MWNTs of 0.2wt%. Ultrasonic treatment for 45 minutes to obtain spinning solution.

[0043] At 25KV of spinning voltage, spinneret is internal diameter 0.85mm, spinning solution flow rate 0.3ml / h, collection roller rotating speed 7m / min, spinnere...

Embodiment 3

[0045] Example 3: A certain amount of MWNTs grafted with TritonX-100 was weighed, added to a DMAc solvent, and treated with ultrasonic waves for 45 minutes to obtain a MWNTs / DMAc solution.

[0046] Weigh a certain amount of anhydrous LiCl, dry it in vacuum at 120°C for 3 hours, then add it to DMAc to form a LiCl / DMAc solution system, weigh a certain amount of aramid 1313 fiber, add it to the LiCl / DMAc solution system, and heat it at 110°C Dissolve under stirring to form a transparent solution.

[0047] The MWNTs / DMAc solution and the aramid fiber 1313 / LiCl / DMAc solution were stirred and mixed for 45 minutes to prepare a mixed solution with a mass fraction of aramid fiber 1313 of 10%, a mass fraction of LiCl of 6wt%, and a mass fraction of MWNTs of 0.4wt%. Ultrasonic treatment for 60 minutes to obtain spinning solution.

[0048] At spinning voltage 23KV, spinneret is internal diameter 0.85mm, spinning liquid flow rate 0.2ml / h, collection roll rotating speed 6m / min, spinneret l...

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Abstract

The invention discloses aramid 1313 / MWCNT (Multi-Walled Carbon Nanotube) nano fibers and a preparation method thereof. The preparation method comprises the following steps of: obtaining MWCNTs grafted with octyl phenoxy poly ethoxy; uniformly dispersing the grafted MWCNTs into a solvent by ultrasonic treatment so as to obtain a solution containing the MWCNTs; obtaining a dissolution system containing halide, adding aramid 1313 fibers into the dissolution system and stirring to dissolve the aramid 1313 fibers so as to obtain a solution containing the aramid 1313 fibers; mixing the two solutions to obtain a spinning solution; by adopting an electrostatic spinning method, obtaining a nano fiber felt of which the fibers are directionally arranged; and obtaining the strengthened nano fiber felt by adopting thermal stretching treatment. According to the invention, the aramid 1313 / MWCNT nano fibers are obtained; the orientation degree of the aramid 1313 is improved; and the tensile breaking strength and the initial modulus of the fiber felt are improved.

Description

technical field [0001] The invention relates to a preparation method of nanofibers, in particular to aramid 1313 / multi-walled carbon nanotube nanofibers and a preparation method thereof. Background technique [0002] Aramid 1313, the chemical name is polym-phenylene isophthalamide (PMIA). The heat resistance of the fiber is particularly outstanding. After continuous use at 260°C for 1000 hours, it can still maintain 65% of the original strength, and at 300°C for one week, it can maintain 50% of the original strength. In addition, it has excellent flame retardancy, Electrical insulation, chemical stability, radiation resistance and mechanical properties, etc., are widely used in special protective clothing, high temperature filter materials, electrical insulation materials and honeycomb structure wall materials, etc. PMIA has a highly regular molecular arrangement and crystal structure, and there are a large number of intermolecular and intramolecular hydrogen bonds, so the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/90D01F1/10D01D5/00D06C3/00
Inventor 潘志娟何斌
Owner SUZHOU UNIV
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