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Graphene carbon nanotube composite high-thermal-conductivity film and preparation method thereof

A technology of carbon nanotube composite and thermal conductive film, which is applied in the direction of carbon nanotubes, nanocarbons, carbon compounds, etc., to achieve the effect of improving thermal conductivity

Inactive Publication Date: 2020-11-10
深圳市展旺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although both CNTs and GNs have high theoretical thermal conductivities, strategies to fabricate high-performance thermally conductive films based on nanostructured carbon materials to address thermal management issues remain challenging.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] ①The expandable graphite was prepared by the modified Hummers method to prepare GO nanosheet powder;

[0030] ② Put the GO nanosheets prepared in ① into a tube furnace, and the H 2 under the atmosphere (H 2 / Ar:V / V is 5 / 95) heated to 400°C and kept for 1h to thermally reduce GO to rGO;

[0031] ③ Nickel oxide is used as the catalyst, ethane is used as the carbon source, and CNTs are grown by catalytic chemical vapor deposition;

[0032] ④ Put the rGO of ② and the CNTs of ③ into the propanol solvent and mix thoroughly, the ratio of rGO and CNTs is 1: 1, and homogenize under high pressure at 24000rpm for 15min to form a uniform rGO / CNTs mixed slurry;

[0033] ⑤ Add PVDF to the rGO / CNTs mixed slurry in ④ as a binder to form a carbon slurry. The mass ratio of rGO / CNTs to PVDF is 4:1. It is coated with a doctor blade, placed in a vacuum drying oven, and dried at 100°C for 2 hours to form a film. ;

[0034] ⑥ The film prepared in ⑤ is calendered at 20 MPa, and the calende...

Embodiment 2

[0037] ①The expandable graphite was prepared by the modified Hummers method to prepare GO nanosheet powder;

[0038] ② Put the GO nanosheets prepared in ① into a tube furnace, and the H 2 under the atmosphere (H 2 / Ar:V / V is 5 / 95) heated to 400°C and kept for 1h to thermally reduce GO to rGO;

[0039] ③Nickel powder is used as catalyst, methane is used as carbon source, and CNTs are grown by catalytic chemical vapor deposition method;

[0040] ④Put the rGO of ② and the CNTs of ③ into the propanol solvent and mix thoroughly, the ratio of rGO and CNTs is 5:1, and homogenize under high pressure at 24000rpm for 15min to form a uniform rGO / CNTs mixed slurry;

[0041] ⑤ Add PVDF to the rGO / CNTs mixed slurry in ④ as a binder to form a carbon slurry. The mass ratio of rGO / CNTs to PVDF is 5:1, apply it with a doctor blade, put it in a vacuum drying oven, and dry it at 100°C for 2 hours to form a film ;

[0042] ⑥ The film prepared in ⑤ is calendered at 30 MPa, and the calendering r...

Embodiment 3

[0045] ①The expandable graphite was prepared by the modified Hummers method to prepare GO nanosheet powder;

[0046] ② Put the GO nanosheets prepared in ① into a tube furnace, and the H 2 under the atmosphere (H 2 / Ar:V / V is 5 / 95) heated to 400°C and kept for 1h to thermally reduce GO to rGO;

[0047] ③ Nickel oxide is used as the catalyst, ethane is used as the carbon source, and CNTs are grown by catalytic chemical vapor deposition;

[0048] ④ Put the rGO of ② and the CNTs of ③ into the propanol solvent and mix thoroughly, the ratio of rGO and CNTs is 1: 2, and homogenize under high pressure at 24000rpm for 15min to form a uniform rGO / CNTs mixed slurry;

[0049] ⑤ Add PVDF to the rGO / CNTs mixed slurry of ④ as a binder to form a carbon slurry. The mass ratio of rGO / CNTs to PVDF is 2:1, apply it with a doctor blade, put it in a vacuum drying oven, and dry it at 100°C for 2 hours to form a film ;

[0050] ⑥ The film prepared in ⑤ is calendered at 40 MPa, and the calendering...

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Abstract

The invention discloses a preparation method of a graphene / carbon nanotube composite heat-conducting film, which mainly comprises the following steps: preparing graphene oxide (GO) nanosheet powder byan improved hummers method, reducing the GO, growing carbon nanotubes by a catalytic chemical vapor deposition method, carrying out high-pressure homogeneous mixing on reduced graphene oxide (rGO) and carbon nanotubes (CNTs), adding an adhesive for coating the film, performing drying film forming, and calendering the film. The preparation process of the graphene / carbon nanotube composite high-thermal-conductivity film is simple, the film thickness is controllable, the in-plane thermal conductivity is up to 1900 w / k.m at 323k, and the thermal conductivity in the vertical direction is 76 w / k.m.

Description

technical field [0001] The invention relates to the technical field of thermal management of carbon materials, in particular to a graphene carbon nanotube composite high thermal conductivity film and a preparation method thereof. Background technique [0002] Both carbon nanotubes (CNTs) and graphene nanosheets (GNs) have aroused great interest in scientific research and development due to their remarkable electrical and thermodynamic properties, showing great potential in various applications. As the size of electronic and nanomechanical devices continues to decrease, there is a growing need for nanostructured carbon materials (such as CNTs and GNs) that can efficiently conduct heat to prevent thermal damage to electronic components. Recently, many pioneering studies have been devoted to applications in integrated circuits and thermal management materials. In fact, since the discovery of CNTs in 1991, it has been speculated that the thermal conductivity of one-dimensional ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/16C01B32/192H01L23/373C09K5/14
CPCC09K5/14C01B32/16C01B32/192H01L23/373
Inventor 张世闯曾凡聪高金鸽张江杨亚敏曲勇威
Owner 深圳市展旺新材料科技有限公司
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