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MXene nanotube and general synthesis method thereof

A synthesis method and nanotube technology, applied in the field of nanomaterials, can solve the problems of affecting and limiting the macroscopic performance and processing performance of MXene, and achieve the effects of good economy, simple and controllable preparation method, and inhibition of lamination and agglomeration.

Inactive Publication Date: 2020-06-19
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, one-dimensional MXene nanotubes have not made any progress so far, which seriously affects and limits the macroscopic performance and processing performance of MXene in various fields.

Method used

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  • MXene nanotube and general synthesis method thereof
  • MXene nanotube and general synthesis method thereof
  • MXene nanotube and general synthesis method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Disperse MXene in N,N-dimethylformamide under normal temperature and pressure conditions to prepare 4ml with a concentration of 10mgmL -1 of the dispersion.

[0030] (2) Dissolve polyacrylonitrile in the MXene dispersion prepared in step (1) at 50°C and mix evenly, wherein the concentration of polyacrylonitrile in the mixed solution is 100 mg mL -1 .

[0031] (3) Dissolve polymethyl methacrylate in N,N-dimethylformamide at 60°C to form a concentration of 200mg mL -1 homogeneous solution.

[0032] (4) Put the mixed solution in step (2) into syringe A, put the solution in step (3) into syringe B, and use an electrospinning machine to carry out coaxial electrospinning. The mixed solution described in step (2) is the outer layer solution, and the advancing speed is 1.0mlh -1 , the solution described in step (3) is the inner layer solution, and the advancing speed is 0.8ml h -1 , the positive voltage is 18kv, the negative voltage is -2.5kv, the spinning distance is ...

Embodiment 2

[0035] (1) Disperse MXene in N,N-dimethylformamide under normal temperature and pressure conditions to prepare 4ml with a concentration of 40mgmL -1 of the dispersion.

[0036] (2) Dissolve polyacrylonitrile in the MXene dispersion prepared in step (1) at 55°C and mix evenly, wherein the concentration of polyacrylonitrile in the mixed solution is 110 mg mL -1 .

[0037] (3) Dissolve polymethyl methacrylate in N,N-dimethylformamide at 70°C to form a concentration of 225mg mL -1 homogeneous solution.

[0038] (4) Put the mixed solution in step (2) into syringe A, put the solution in step (3) into syringe B, and use an electrospinning machine to carry out coaxial electrospinning. The mixed solution described in step (2) is the outer layer solution, and the advancing speed is 1.1mlh -1 , the solution described in step (3) is the inner layer solution, and the advancing speed is 0.9ml h -1 , the positive voltage is 20kv, the negative voltage is -2.5kv, the spinning distance is ...

Embodiment 3

[0041] (1) Disperse MXene in N,N-dimethylformamide under normal temperature and pressure conditions to prepare 4ml with a concentration of 60mgmL -1 of the dispersion.

[0042] (2) Dissolve polyacrylonitrile in the MXene dispersion prepared in step (1) at 60°C and mix evenly, wherein the concentration of polyacrylonitrile in the mixed solution is 120mg mL -1 .

[0043] (3) Dissolve polymethyl methacrylate in N,N-dimethylformamide at 75°C to form a concentration of 250mg mL -1 homogeneous solution.

[0044] (4) Put the mixed solution in step (2) into syringe A, put the solution in step (3) into syringe B, and use an electrospinning machine to carry out coaxial electrospinning. The mixed solution described in step (2) is the outer layer solution, and the advancing speed is 1.2mlh -1 , the solution described in step (3) is the inner layer solution, and the advancing speed is 1.0ml h -1 , the positive voltage is 22kv, the negative voltage is -2.5kv, the spinning distance is 1...

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Abstract

The invention discloses an MXene nanotube and a general synthesis method thereof, and belongs to the field of nano materials. The MXene nanotube is formed by overlapping two-dimensional MXene in a staggered mode in the axial direction, the outer diameter of the MXene nanotube ranges from 0.5 micrometer to 1 micrometer, and the wall thickness of the MXene nanotube ranges from 0.02 micrometer to 0.1micrometer. The preparation method comprises the following steps: preparing a MXene / polymer composite fiber with the core-shell structure by using an electrostatic spinning machine, and removing a sacrificial template at 600-700 DEG C, thereby obtaining the MXene nanotube with controllable structure and size. The MXene nanotube obtained by the invention overcomes the basic problem that two-dimensional MXene is easy to stack and agglomerate under Van der Waals' force, has the advantages of large specific surface area, simple and controllable preparation method, good economy and the like, and lays a foundation for preparation and processing of high-performance functional materials based on MXene and application of the high-performance functional materials in various aspects. The MXene nanotubes are mutually crosslinked to form a flexible three-dimensional assembly, so that the application of the MXene material in the fields of wearable flexible energy devices, electromagnetic shielding,wave-absorbing materials and the like is expanded.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and relates to an MXene nanotube and a general synthesis method thereof. Background technique [0002] Nanomaterials have a unique size effect. Compared with bulk materials, nanomaterials have larger active areas, shorter ion and electron transmission distances, exhibit excellent physical and chemical properties, and are widely used in many fields. The performance of functional nanomaterials largely depends on their morphology, size, and crystal phase structure. Fine regulation of their microstructure to achieve structural design and controllable construction has become a hot area of ​​scientific research on nanomaterials in recent years. [0003] MXene is a new type of transition metal carbide or nitride two-dimensional crystal with a two-dimensional structure similar to graphene. Its chemical formula is M n+1 x n , (n=1, 2, 3, M is a transition metal element, X is carbon or nitrogen). Thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/921C01B32/914C01B32/949C01B32/907C01B21/082C01B21/06C01B21/076B82Y40/00
CPCC01B32/921C01B32/914C01B32/949C01B32/907C01B21/0828C01B21/0602C01B21/0617C01B21/062C01B21/0768B82Y40/00C01P2004/13C01P2004/62C01P2004/64
Inventor 王治宇邱介山孟祥玉刘钰昭
Owner DALIAN UNIV OF TECH
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