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Copper-filled carbon nanotube array-based composite material and preparation method thereof

A carbon nanotube array and composite material technology, applied in the field of nano-micro composite materials, can solve the problems of damaged carbon nanotubes, reduced porosity, unfavorable fillers, etc., to improve thermal conductivity, reduce phonon scattering, and improve thermal performance Effect

Active Publication Date: 2019-08-20
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this scheme, mechanical external force is first used to increase the density of carbon nanotube arrays, but the application of mechanical external force will damage the structure of carbon nanotubes, resulting in the increase of carbon nanotube defects and affecting the performance of materials. After increasing the density, carbon nanotube arrays The internal space is reduced and the porosity is reduced, which is not conducive to the entry of fillers

Method used

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  • Copper-filled carbon nanotube array-based composite material and preparation method thereof
  • Copper-filled carbon nanotube array-based composite material and preparation method thereof
  • Copper-filled carbon nanotube array-based composite material and preparation method thereof

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[0041] As an aspect of the technical solution of the present invention, it relates to a method for preparing a metal-filled carbon nanotube array-based composite material, which includes:

[0042] Provide carbon nanotube arrays;

[0043] Allowing the precursor containing metal elements and the reducing carrier gas to enter the interior of the carbon nanotube array and then react to obtain a plurality of micron metal particles filling the internal pores of the carbon nanotube array;

[0044] Performing high-temperature annealing treatment on the carbon nanotube array filled with micron metal particles, so that the plurality of micron metal particles are fused with each other to obtain a metal-filled carbon nanotube array-based composite material.

[0045]In some embodiments, the preparation method specifically includes:

[0046] allowing the precursor and the reducing carrier gas to enter the interior of the carbon nanotube array to react to form a plurality of nano metal part...

Embodiment 1

[0083] Put about 200mg of copper sulfate pentahydrate in the quartz boat as a copper-containing precursor, place it in the first temperature zone of the dual-temperature zone tube furnace, and place the carbon nanotubes grown on the silicon substrate in the second temperature zone Array, pass into 50sccm of Ar for 5min, exhaust the air in the device, and pass into 200sccm of H 2 . The temperature of the second temperature zone was first raised to 800°C, and after the temperature was stabilized, the temperature of the first temperature zone was raised to 200°C, and then reacted for 4 hours. After the reaction is over, let the device cool down to room temperature naturally, and then use 500 sccm of Ar to remove the H in the device. 2 Drain clean and remove the sample. Cut the sample from the middle, and its SEM picture is the same as Figure 4a Figure 4c Similarly, it can be seen that copper exists mainly in the form of particles on its surface, where the size of the micron...

Embodiment 2

[0085] About 360mg of copper acetate monohydrate is placed in the quartz boat as a copper-containing precursor, and it is placed in the first temperature zone of the dual temperature zone tube furnace, and the carbon grown on the silicon dioxide substrate is placed in the second temperature zone. For the nanotube array, 500 sccm of Ar was introduced for 5 minutes, the air in the device was exhausted, and then 200 sccm of Ar and H were respectively introduced. 2 . First raise the temperature of the second temperature zone to 1000°C, and after the temperature stabilizes, then raise the temperature of the first temperature zone to 300°C, and then react for 6 hours. After the reaction is over, let the device cool down to room temperature naturally, and then use 500 sccm of Ar to remove the H in the device. 2 Drain clean and remove the sample. Cut the sample from the middle, and its SEM picture is as follows Figure 3a and Figure 3b As shown, the size of the micron copper part...

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Abstract

The invention discloses a copper-filled carbon nanotube array-based composite material and a preparation method thereof. The preparation method comprises the following steps: a carbon nanotube array is provided; a copper-containing precursor and the carbon nanotube array are respectively placed in a first temperature zone and a second temperature zone of chemical vapor deposition equipment; the precursor is vaporized, and a reducing carrier gas carries the precursor and enters the carbon nanotube array; the reducing carrier gas and the precursor react in the carbon nanotube array to form a plurality of nano copper particles, and the plurality of nano copper particles are subjected to nucleation growth in internal pores of the carbon nanotube array to form a plurality of micron copper particles; and high-temperature annealing treatment is carried out on the carbon nanotube array filled with the micron copper particles, so that the plurality of micron copper particles are fused mutuallyto obtain the copper-filled carbon nanotube array-based composite material. The prepared copper-filled carbon nanotube array-based composite material has excellent heat conduction performance.

Description

technical field [0001] The invention relates to a method for preparing a carbon nanotube composite material, in particular to a copper-filled carbon nanotube array-based composite material, a preparation method and a system used therefor, and belongs to the technical field of nano-micro composite materials. Background technique [0002] Carbon nanotube vertical array, as a form of carbon nanotube alignment, the internal carbon nanotubes are perpendicular to the growth substrate, which not only has excellent thermal conductivity in the height direction, but also has a relatively consistent aspect ratio and better The single orientation and high purity of carbon nanotubes, while maintaining the high electrical conductivity, good mechanical properties and flexibility of carbon nanotubes, have broad application prospects in many fields. However, there are up to 90-95% of the pores inside the carbon nanotube array, which makes the measured thermal conductivity and electrical cond...

Claims

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Application Information

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IPC IPC(8): C01B32/178
CPCC01B2202/10
Inventor 姚亚刚张凯
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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