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A preparation method of impact-resistant and heat-conducting aluminum alloy-carbon fiber-graphene laminate

A graphene layer and aluminum alloy technology, which is applied in the preparation of composite materials and electronic fields, can solve the problems of easy delamination of laminates, poor interlayer performance, poor fatigue resistance, etc., and achieve stable preparation performance, improved fatigue performance, The effect of stable performance of the finished product

Active Publication Date: 2019-08-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In today's applications, graphene thermally conductive films are directly laid on the backplanes of mobile phones and computer covers. Some manufacturers try to integrate thermally conductive films into the backplanes of electronic devices, but there are the following problems: The graphene heat-conducting film on the metal back cover of the device makes the integrity of the mobile phone insufficient, which increases the difficulty for the subsequent development of the waterproof and dustproof performance of the mobile phone. decline
(3) The backplane of electronic components made of ordinary aluminum alloy, due to the low strength of the aluminum alloy, is prone to bending, cannot withstand certain impacts, and has poor fatigue resistance
[0008] The plate made of aluminum alloy-carbon fiber-graphene laminate has the following problems: (1) The interlayer performance is poor, and the laminate is easy to delaminate and unstable during subsequent processing.
(2) There are a lot of bubbles between the aluminum alloy and the heat conduction film, which seriously affects the heat conduction efficiency

Method used

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  • A preparation method of impact-resistant and heat-conducting aluminum alloy-carbon fiber-graphene laminate
  • A preparation method of impact-resistant and heat-conducting aluminum alloy-carbon fiber-graphene laminate
  • A preparation method of impact-resistant and heat-conducting aluminum alloy-carbon fiber-graphene laminate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The first step is to select a 2024-T3 aluminum alloy blank of 500mm×500mm×0.4mm, and perform phosphoric acid anodic oxidation treatment on the inner surface, so that the surface of the 2024-T3 aluminum alloy can obtain a more favorable surface morphology and resin hot-compression composite, and strengthen the Interlayer strength; the outer surface is treated with chemical lye ablation to increase the surface area of ​​the outer surface, thereby increasing the contact area between the aluminum alloy and the air, increasing the heat convection efficiency, and accelerating the heat dissipation rate.

[0045] The second step is to select and cut 500mm×500mm×0.125mm graphene thermal film BM1000 (carbon-carbon composite material);

[0046] The third step is to select and cut 500mm×500mm×0.2mm woven carbon fiber epoxy resin prepreg WP-3011, and the epoxy resin model is 9B14.

[0047] The fourth step is to spray glue on the graphene thermal conductive film, spray a thin layer o...

Embodiment 2

[0052] The first step is to select a 7075-T4 aluminum alloy blank of 600mm×600mm×0.3mm, and perform phosphoric acid anodizing treatment on the inner surface, so that the surface of the 7075-T4 aluminum alloy can obtain a more favorable surface morphology and composite with resin hot pressing, and strengthen Interlayer strength; the outer surface is treated with chemical lye ablation to increase the surface area of ​​the outer surface, thereby increasing the contact area between the aluminum alloy and the air, increasing the heat convection efficiency, and accelerating the heat dissipation rate. Carry out wire cutting after surface treatment, and cut into circular blanks with a radius of 500mm.

[0053] The second step is to select and cut a circular graphene heat conduction film BM1000 (carbon-carbon composite material) with a radius of 500mm and a thickness of 0.125mm;

[0054] The third step is to select and cut the unidirectional carbon fiber epoxy resin prepreg USN20000 wi...

Embodiment 3

[0059] The first step is to select 6061-T3 roll-bending aluminum alloy blanks of 1000mm×350mm×0.5mm, and perform phosphoric acid anodic oxidation treatment on the inner surface, so that the surface of 6061-T3 aluminum alloy can obtain a more favorable surface shape for hot-pressing resin composite. The outer surface is treated with chemical lye ablation to increase the surface area of ​​the outer surface, thereby increasing the contact area between the aluminum alloy and the air, increasing the heat convection efficiency, and accelerating the heat dissipation rate.

[0060] The second step is to select and cut 1000mm×350mm×0.125mm graphene thermal film BM1000 (carbon-carbon composite material);

[0061] The third step is to select and cut 1000mm×350mm×0.2mm unidirectional carbon fiber epoxy resin prepreg USN20000, and the epoxy resin model is 9B14.

[0062] The fourth step is to spray glue on the graphene thermal conductive film, spray a thin layer of epoxy resin on both sides...

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Abstract

The invention discloses a preparation method for impact-resistant and heat-conducting aluminum alloy-carbon fiber-graphene laminates. The preparation method comprises the following steps: 1) carryingout different surface treatment on the inner surface and the outer surface of an aluminum alloy blank, and carrying out surface treatment on a graphene heat-conducting film; 2) paving the aluminum alloy blank subjected to the surface treatment, an epoxy resin glue film and the graphene heat-conducting film in multiple layers; and 3) putting laminates obtained after pavement is completed into a vulcanizing machine, adopting a preset heating system, and carrying out epoxy resin curing and aluminum alloy ageing forming at the same time, so that preparation of the aluminum alloy-carbon fiber-graphene laminates is realized. The invention firstly puts forward a preparation scheme, applicable to mass production, of aluminum alloy-carbon fiber-graphene laminates used for an electronic product, preparation process is simple, the prepared finished product is stable in performance, interlayer performance is better, layering is difficult, and the aluminum alloy-carbon fiber-graphene laminates areapplicable to long-time application in electronic components.

Description

technical field [0001] The invention relates to the electronic field, in particular to a method for preparing an aluminum alloy-carbon fiber-graphene laminate, and belongs to the field of composite material preparation. Background technique [0002] When mobile phones, computers and other electronic products are frequently used or played games, the heat inside the hand will become very serious, especially chips, batteries, graphics cards, etc. Excessive heat generation will cause discomfort when holding it, and on the other hand, the performance of the mobile phone may also be affected, or even restart or freeze. Therefore, in order to dissipate the heat of electronic products faster, many mobile phone manufacturers will paste graphite heat sinks on mobile phones, which is what we often call graphite heat dissipation. [0003] Thermally conductive graphite sheet, also known as heat sink, is a high thermal conductivity and heat dissipation material. The chemical composition ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/04B32B15/14B32B27/12B32B9/00B32B9/04B32B37/12B32B37/02B32B37/06B32B37/10H01L23/373
CPCB32B5/02B32B9/007B32B9/047B32B15/14B32B27/12B32B37/02B32B37/06B32B37/10B32B37/1284B32B2255/04B32B2255/26B32B2260/021B32B2260/046B32B2262/106B32B2264/108B32B2307/302B32B2307/558B32B2307/714H01L23/3735H01L23/3736H01L23/3738
Inventor 陶杰靳凯陈虞杰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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