Carbon nanotube film and preparation method thereof

A carbon nanotube film, carbon nanotube technology, applied in nanotechnology, chemical instruments and methods, carbon compounds, etc., can solve the problems of low degree of axial orientation, inability to maintain structural stability, etc. Good chemical potential and structural self-sustainability

Active Publication Date: 2019-07-12
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

In the aforementioned methods, the carbon nanotube film prepared by the dry method has a high degree of order and good capacitance characteristics, but it cannot maintain a stable structure in an aqueous solution and needs to be clamped and fixed by an external force; the electrophoretic deposition meth

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  • Carbon nanotube film and preparation method thereof
  • Carbon nanotube film and preparation method thereof
  • Carbon nanotube film and preparation method thereof

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[0028] The present invention also provides a preparation method of the carbon nanotube film, the preparation method comprises the following steps:

[0029] In the first step, the non-array carbon nanotube material is grown on the silicon wafer by using the ion reactive etching method and the water-assisted chemical vapor deposition method. Specifically, by controlling the reaction gas flow rate, growth time and other conditions, the power of the ion reactive etching is 18W, the gas source is Ar, the growth temperature of the water-assisted chemical vapor deposition method is 750 ° C, C 2 H 4 The flow rate is 100sccm, and the growth time is 20min; the prepared non-array carbon nanotube material is mainly composed of 3-wall (average diameter of 8.1nm) carbon nanotubes, and the purity is as high as 99.98%. The length of the carbon nanotubes is greater than 800μm, and the density About 9.7mg / cm 3 .

[0030] In step 2, the prepared non-array carbon nanotube material is peeled of...

Example Embodiment

[0033] Example 1

[0034] The preparation method of the carbon nanotube film provided by the first embodiment of the present invention mainly includes the following steps:

[0035] (1) The silicon wafer (5 cm in diameter) was ultrasonically cleaned in ethanol for 10 min to remove dust on the surface, and then blown to a dry state with nitrogen. After the catalyst film is plated on the silicon wafer, the density of the catalyst is reduced by the ion reaction etching method, and the non-array carbon nanotube material is grown in a tube furnace (750 ℃). The prepared non-array carbon nanotube material is mainly composed of 3 Wall (average diameter is 8.1nm) composed of carbon nanotubes, the purity is as high as 99.98%, the length of carbon nanotubes is greater than 800μm, and the density is about 9.7mg / cm 3 .

[0036] (2) peeling off the non-array carbon nanotubes from the silicon wafer, and preparing a carbon nanotube film with a nano-groove structure through a mechanical drawi...

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Abstract

The invention belongs to the related technical field of nano material preparation, and discloses a carbon nanotube film and a preparation method thereof. The preparation method of the carbon nanotubefilm comprises the following steps: firstly, providing a non-array carbon nanotube material; and secondly, performing mechanical drawing treatment on the non-array carbon nanotube material to obtain acarbon nanotube film having a nano-groove structure. The carbon nanotube film is prepared through the preparation method of the carbon nanotube film, and has a bulk density of 520 mg/cm<3> and an area density of 4.1 mg/cm<2>; the aggregation degree between carbon nanotubes is small, and the axial array degree is 0.3 to 0.68. The carbon nanotube film provided by the invention does not change in size in various aqueous electrolytes, and the mechanical tensile strength is as high as 700 kPa; a relatively large capacitance change can be generated under the action of external uniaxial pressure, and the capacitance performance is relatively high.

Description

technical field [0001] The invention belongs to the technical field related to the preparation of nanomaterials, and more specifically relates to a carbon nanotube film and a preparation method thereof. Background technique [0002] In the field of nanomaterials, carbon nanotube films are due to their excellent electrical properties (conductivity up to 10 6 S / m), thermal (thermal conductivity up to 3000W / m K) and mechanical properties have a wide range of applications in Li-ion batteries, supercapacitors, electric and thermal brakes, flexible displays, tensile strain sensors, energy recovery, etc. At present, the preparation methods of carbon nanotube films mainly include dry method, electrophoretic deposition method, spray coating method, spin coating method and vacuum filtration method. The intertwined structure of carbon nanotubes can realize carbon nanotube drawing, and a transparent carbon nanotube film with a high degree of orientation (axial direction) is prepared. ...

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Application Information

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IPC IPC(8): C01B32/168B82Y40/00
CPCB82Y40/00C01B32/168
Inventor 徐鸣张蒙蒙邓泽明
Owner HUAZHONG UNIV OF SCI & TECH
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