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Titanium carbide nanosheet/carbon nanotube electromagnetic shielding film and preparation method thereof

An electromagnetic shielding and carbon nanotube technology, which is applied in the fields of magnetic field/electric field shielding, electrolytic coatings, electrical components, etc., can solve problems such as difficulty in ensuring dispersion, difficulty in achieving ideal electrical properties and shielding properties, and easy agglomeration of carbon nanomaterials. Achieve the effects of good mechanical properties, excellent electromagnetic shielding efficiency, and simple preparation process

Active Publication Date: 2021-09-03
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current research focuses on the compounding of powdery carbon nanomaterials and high molecular polymers. Although this compound can guarantee a certain shielding effect and relatively stable mechanical properties, carbon nanomaterials in high molecular polymers It is easy to agglomerate, and it is difficult to ensure uniform dispersion, making it difficult to achieve ideal values ​​for its electrical properties and shielding properties

Method used

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  • Titanium carbide nanosheet/carbon nanotube electromagnetic shielding film and preparation method thereof
  • Titanium carbide nanosheet/carbon nanotube electromagnetic shielding film and preparation method thereof
  • Titanium carbide nanosheet/carbon nanotube electromagnetic shielding film and preparation method thereof

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Effect test

Embodiment 1

[0029] A method for preparing titanium carbide nanosheet / carbon nanotube composite film by electrophoretic deposition, comprising the following steps:

[0030] 1) Using titanium carbide aluminum block as raw material, prepare titanium carbide nanosheet powder by chemical etching method. The etching reagent is LiF / HCl. Perform high-speed centrifugation on the etching dispersion liquid three times to separate the upper layer solution. 3000rpm, 5000rpm, and 8000rpm respectively. The centrifuged solution was vacuum filtered and freeze-dried to obtain powdered titanium carbide nanosheets, wherein the size of a single nanosheet was 50nm-50μm, and then the titanium carbide nanosheet powder was quantitatively dispersed in H 2 In O, the concentration is 0.1mg / mL, without adding additional reagents;

[0031] 2) The carbon nanotube film with a thickness of 10 μm prepared by chemical vapor deposition is used as the working electrode, and the titanium carbide nanosheet base dispersion liqu...

Embodiment 2

[0035] A method for preparing titanium carbide nanosheet / carbon nanotube composite film by electrophoretic deposition, comprising the following steps:

[0036] 1) Using titanium aluminum carbide block as raw material, prepare titanium carbide nanosheet powder by chemical etching method, the etching reagent is LiF / HCl, perform three high-speed centrifugation on the dispersion liquid obtained by etching, separate the upper layer solution, and centrifuge The rotational speeds are 3000rpm, 5000rpm, and 8000rpm respectively, and the centrifuged solution is vacuum filtered and freeze-dried to obtain powdered titanium carbide nanosheets.

[0037] Among them, the size of a single nanosheet is 50nm-50μm, and then the titanium carbide nanosheet powder is quantitatively dispersed in H 2 In O, the concentration is 1mg / mL, without adding additional reagents;

[0038] 2) The 20 μm carbon nanotube film prepared by chemical vapor deposition was used as the working electrode, and the titanium...

Embodiment 3

[0043] A method for preparing titanium carbide nanosheet / carbon nanotube composite film by electrophoretic deposition, comprising the following steps:

[0044] 1) Using titanium aluminum carbide block as raw material, prepare titanium carbide nanosheet powder by chemical etching method, the etching reagent is LiF / HCl, perform three high-speed centrifugation on the dispersion liquid obtained by etching, separate the upper layer solution, and centrifuge The rotational speeds are 3000rpm, 5000rpm, and 8000rpm respectively, and the centrifuged solution is vacuum filtered and freeze-dried to obtain powdered titanium carbide nanosheets.

[0045] Among them, the size of a single nanosheet is 50nm-50μm, and then the titanium carbide nanosheet powder is quantitatively dispersed in H 2 In O, the concentration is 1mg / mL, without adding additional reagents;

[0046] 2) The 20 μm carbon nanotube film prepared by chemical vapor deposition was used as the working electrode, and the titanium...

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Abstract

The invention provides an electromagnetic shielding composite film and a method for preparing the titanium carbide nanosheet / carbon nanotube composite film by electrophoretic deposition. The preparation method comprises: using a titanium carbide aluminum block as a raw material, preparing titanium carbide nanosheet powder by chemical etching, and quantitatively dispersing it in a solvent; using a self-supporting carbon nanotube film as a working electrode, and using a titanium carbide nanosheet base The dispersion liquid is an electrolyte solution, and electrophoretic deposition is performed to obtain a titanium carbide nanosheet / carbon nanotube composite film; a certain follow-up treatment can be performed on the titanium carbide nanosheet / carbon nanotube composite film. The invention realizes a titanium carbide nanosheet / carbon nanotube composite film for electromagnetic shielding, and provides a simple, rapid and large-scale preparation method of the structure, which has broad application prospects in the field of electromagnetic shielding materials.

Description

technical field [0001] The invention relates to an electromagnetic shielding composite film material, which belongs to the technical field of application of carbon-based nanomaterials in wave-absorbing shielding, and in particular to a titanium carbide nanosheet / carbon nanotube electromagnetic shielding film and a preparation method thereof. Background technique [0002] With the widespread use of electronic equipment, excessive electromagnetic radiation has begun to affect the normal work and life of human beings and become a new source of pollution. Therefore, the research on electromagnetic shielding materials has also received increasing attention. Most of the electromagnetic shielding materials commercially available at this stage are highly conductive metal materials, which have problems such as high density, poor flexibility, and easy corrosion. [0003] In the research field of electromagnetic shielding materials, carbon nanomaterials represented by carbon nanotubes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D13/02H05K9/00
CPCC25D13/02H05K9/0081
Inventor 桂许春杨荣亮陆冬伟汤子康
Owner SUN YAT SEN UNIV
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