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Preparation method of high-strength MXene fibers

A high-strength, fiber-based technology, applied in fiber processing, fiber chemical characteristics, wet spinning, etc., can solve the problems of low strength of MXene fibers, and achieve the effects of good electrical conductivity, increased strength, and great application prospects.

Active Publication Date: 2020-12-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by this invention is to provide a kind of preparation method of high-strength MXene fiber, to overcome the low defect of MXene fiber intensity in the prior art

Method used

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  • Preparation method of high-strength MXene fibers
  • Preparation method of high-strength MXene fibers
  • Preparation method of high-strength MXene fibers

Examples

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Effect test

Embodiment 1

[0031] The present embodiment provides a kind of preparation method of high-strength MXene fiber, specifically comprises:

[0032] (1) Disperse 1.6g lithium fluoride in 15mL 9mol / L hydrochloric acid solution, stir for 5min to obtain a clear dispersion, add 1g MAX Ti 3 C 2 Al, stir at 35°C for 24 hours; centrifuge the obtained dispersion 3 times at a speed of 3500rpm for 2 minutes each time, remove the lower precipitate until it is neutral; add the obtained precipitate to ultrapure water, oscillate evenly, and then centrifuge. The speed is 3500 rpm, the time is 10 min, and the supernatant is taken; the obtained supernatant is continuously centrifuged at a speed of 8000 rpm, and the time is 1 h. Take the precipitate to get 50mg / mL MXene spinning slurry;

[0033] (2) Take 2.5g chitosan in 500mL ultrapure water, add 5mL acetic acid, stir for 2h to form a clear chitosan solution. Then the spinning slurry in the step (1) is injected into the coagulation bath of the chitosan solut...

Embodiment 2

[0038] The present embodiment provides a kind of preparation method of high-strength MXene fiber, specifically comprises:

[0039] (1) Disperse 1.6g lithium fluoride in 20mL 9mol / L hydrochloric acid solution, stir for 10min to obtain a clear dispersion, add 1g MAX Ti 3 C 2 Al, stir at 35°C for 24 hours; centrifuge the obtained dispersion 5 times at a speed of 3500rpm for 2 minutes each time, remove the lower layer of sediment until it is neutral; add the obtained precipitate to ultrapure water, oscillate evenly, and then centrifuge. The speed is 4500rpm, the time is 8min, and the supernatant is taken; the obtained supernatant is centrifuged continuously, the speed is 7000rpm, and the time is 2h. Take the precipitate and add 5mL ultrapure water to obtain 33mg / mL MXene spinning slurry;

[0040](2) Take 2 g of chitosan in 500 mL of ultrapure water, add 4 mL of acetic acid, and stir for 2 hours to form a clear chitosan solution. Then the spinning slurry in the step (1) is injec...

Embodiment 3

[0044] The present embodiment provides a kind of preparation method of high-strength MXene fiber, specifically comprises:

[0045] (1) Disperse 1.6g lithium fluoride in 30mL 9mol / L hydrochloric acid solution, stir for 20min to obtain a clear dispersion, add 1g MAX Ti 3 C 2 Al, stir at 35°C for 24 hours; centrifuge the obtained dispersion 5 times at a speed of 3500rpm for 2 minutes each time, remove the lower layer of sediment until it is neutral; add the obtained precipitate to ultrapure water, oscillate evenly, and then centrifuge. The speed is 4000rpm, the time is 8min, and the supernatant is taken; the obtained supernatant is centrifuged continuously, the speed is 10000rpm, and the time is 1h. Take the precipitate and add 10mL ultrapure water to get 25mg / mL MXene spinning slurry;

[0046] (2) Take 1 g of chitosan in 500 mL of ultrapure water, add 5 mL of acetic acid, and stir for 2 hours to form a clear chitosan solution. Then the spinning slurry in the step (1) is injec...

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Abstract

The invention relates to a preparation method of high-strength MXene fibers. The preparation method comprises the following steps of etching MAX Ti3C2Al, washing to neutrality, carrying out primary centrifugation to remove precipitates, carrying out secondary centrifugation on obtained upper dispersion liquid, and adding or not adding ultrapure water into obtained precipitates to obtain MXene spinning slurry; and then injecting the MXene spinning slurry into a coagulating bath of a chitosan solution, soaking the obtained MXene fibers in a hydroiodic acid solution, washing and drying. The method is simple and suitable for continuous large-scale preparation, and the obtained MXene fiber has high strength and good conductivity.

Description

technical field [0001] The invention belongs to the field of preparation of MXene fibers, in particular to a preparation method of high-strength MXene fibers. Background technique [0002] As a new member of the two-dimensional material family, MXene has been widely used in many fields such as energy storage, sensing, and thermoelectricity since it came out in 2011. The composition of MXene can be expressed as M n+1 x n T x , where M stands for transition metals, usually titanium Ti, vanadium V, chromium Cr and molybdenum Mo, etc. X is usually carbon C or nitrogen N, and T x It represents the terminal group on the surface of the material, such as -O, -OH or -F. Among many MXenes, titanium carbide Ti 3 C 2 It was the first to be prepared and the most widely studied. Titanium carbide nanosheets have excellent mechanical properties, excellent metal conductivity, and the surface is hydrophilic, so it has aroused the interest of many researchers. Although nanoscale MXene...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01F11/00D01D5/06D06M11/13
CPCD01D5/06D01F9/08D01F11/00D06M11/13
Inventor 李耀刚吴桂青刘芮王宏志侯成义张青红
Owner DONGHUA UNIV
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