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Lightweight flexible high thermal conductivity nano-carbon composite film and preparation method thereof

A nano-carbon and composite film technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of poor adhesion between resin and graphene film, poor flexibility of graphene film, easy peeling, etc. Easy to peel off, broad application prospects, and the effect of improving bonding properties

Active Publication Date: 2019-05-03
SHANGHAI COMPOSITES SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the flexibility of graphene film is poor, it is easy to peel off during use, and it is difficult to bend when the thickness of graphene film is large, so it is limited in practical application.
In recent years, some technologies have introduced polymers between graphene sheets to improve its flexibility, but it is difficult to solve the problem that graphite sheets are easy to peel off.
In addition, there are some technologies to solve the peeling problem by coating the surface of the graphene film with resin, but the bonding performance between the resin and the graphene film is poor.

Method used

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  • Lightweight flexible high thermal conductivity nano-carbon composite film and preparation method thereof
  • Lightweight flexible high thermal conductivity nano-carbon composite film and preparation method thereof

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preparation example Construction

[0050] The following embodiments also provide a method for preparing a lightweight, flexible and highly thermally conductive nano-carbon composite film, comprising the following steps:

[0051]The first step is to prepare a flexible bonding layer. In order to control the thermal conductivity and flexibility of the carbon nanocomposite film, the flexible bonding layer can choose carbon nanotube film / resin prepreg or carbon nanotube / resin slurry slurry. For nano-carbon composite films with high thermal conductivity and flexibility, choose carbon nanotube film / resin prepreg; otherwise, choose carbon nanotube / resin slurry as a flexible bonding layer.

[0052] The preparation of carbon nanotube film / resin prepreg comprises the following steps:

[0053] (a) Dissolving the resin in a solvent to prepare a resin solution with a certain concentration, the mass content of the resin in the solution is controlled at 10% to 30%, and the resin is: epoxy resin, double horse resin, phenolic re...

Embodiment 1

[0064] This embodiment provides a light, flexible, high thermal conductivity nano-carbon composite film and a preparation method thereof. The nano-composite film is a multilayer structure comprising a carbon nanotube film / resin prepreg and a graphene film layer, which has a fixed A typical structure of two parts, the end and the flexible segment. Described preparation method, concrete steps are as follows:

[0065] In the first step, a flexible adhesive layer is prepared, and a carbon nanotube film with a length of 1000 mm, a width of 200 mm, and a thickness of 10 μm is cut with a scalpel. The carbon nanotube film is prepared by chemical vapor deposition and floating catalytic method. The carbon nanotube / resin prepreg was prepared by resin solution impregnation method, AG80 resin, DDS curing agent and BF3·MEA were mixed uniformly at a mass ratio of 100:30:1 to form a resin system, and then the resin system was mixed with acetone at 30 : The mass ratio of 70 is mixed evenly to...

Embodiment 2

[0071] This embodiment provides a light, flexible, high thermal conductivity nano-carbon composite film and a preparation method thereof. The nano-composite film is a multilayer structure comprising carbon nanotubes / resin slurry and a graphene film layer, which has a fixed section and Typical structure of the two parts of the flexible segment. Described preparation method, concrete steps are as follows:

[0072] The first step is to prepare a flexible adhesive layer, and mix E51 resin and 2-ethyl-4 methylimidazole at a mass ratio of 100:7 to form a resin system. Select multi-walled carbon nanotubes with a diameter of 20 μm, pour 1 g of carbon nanotubes into 99 g of resin system and stir for 30 min. Then use a three-roll mill to disperse, and disperse the carbon nanotube / resin mixture twice to obtain a uniform carbon nanotube dispersion. Then 100 g of acetone solution was poured into the carbon nanotube dispersion and stirred for 30 minutes to obtain a carbon nanotube / resin s...

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Abstract

The invention provides a light, flexible and high thermal conductivity nano-carbon composite film and a preparation method thereof; the nano-carbon composite film includes a plurality of composite units, and the composite units are layered sequentially; the composite unit includes a flexible bonding layer and graphite graphene film layer, and the flexible adhesive layer is arranged on both sides of the graphene film layer. The preparation method comprises laminating the composite units sequentially and then heat-pressing to obtain them. The nano-carbon composite film prepared by the present invention has the characteristics of high thermal conductivity, light weight, and flexibility, and its in-plane thermal conductivity is above 500W / m·K, and its density is lower than 2.0g / cm3, and the nano-carbon composite film is repeated through 180° After bending 50 times, the thermal conductivity is still higher than 500W / m·K, and there is no graphene exfoliation on the surface. It has a very broad application prospect in satellite communication, earth observation, deep space exploration, civil electronic devices and other fields.

Description

technical field [0001] The invention relates to a preparation method of a nano-carbon composite film, in particular to a light, flexible and high-thermal-conduction nano-carbon composite film and a preparation method thereof. Background technique [0002] With the development of electronic systems in the direction of high integration, high speed, and high power, the problem of thermal energy management has become more and more prominent. The development of lightweight and high thermal conductivity materials has become the key technology to solve this problem, and the needs of national defense and national economy are urgent. Taking space science and technology as an example, since the mid-1960s, satellite communication technology, space exploration, earth observation and other technologies have developed rapidly, and the requirements for satellite resolution and accuracy are increasing day by day. For high-resolution and high-precision satellites, even the smallest thermal d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B9/00B32B9/04B32B7/10B32B33/00B32B37/06B32B37/10
CPCB32B7/10B32B9/007B32B9/04B32B33/00B32B37/06B32B37/10B32B2307/302B29C70/003B82Y40/00B29C51/00B29C70/44B29C70/86B29C70/088B29C70/685B29K2105/167B29K2307/04B32B2605/00B32B2307/732B82Y30/00B32B7/12B32B9/045
Inventor 刘千立沈峰王晓蕾郝旭峰田杰
Owner SHANGHAI COMPOSITES SCI & TECH CO LTD
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