Method for preparing thin high-strength composite heat-conducting functional film of sandwich structure

A sandwich structure, high-strength technology, applied in the direction of fiber type, physical treatment, fiber treatment, etc., can solve problems such as loose interface links, performance deterioration, and difficult to control the toxicity of the reduction process, and achieve low cost, good mechanical properties, and effective use Good results

Pending Publication Date: 2020-11-10
GUIZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, it is difficult to control the modification ratio, redispersion level, and the toxicity of the reduction process in actual operation, especially the agglomeration of graphene under high loading is unavoidable, which will lead to loosening of interfacial links and lead to performance deterioration. This has always been between researchers and Difficulties faced by enterprise technicians

Method used

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  • Method for preparing thin high-strength composite heat-conducting functional film of sandwich structure
  • Method for preparing thin high-strength composite heat-conducting functional film of sandwich structure
  • Method for preparing thin high-strength composite heat-conducting functional film of sandwich structure

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Embodiment 1

[0021] Embodiment 1 of the present invention: a method for efficiently dispersing graphene nanosheets in water through natural nanocellulose, the method comprising the following steps:

[0022] Add few-layer graphene or multi-layer graphene directly to the prepared TEMPO-mediated oxidized nanocellulose gel (it can also be a high-concentration aqueous suspension), and combine nanocellulose and graphite under the action of continuous shearing and stirring. Alkene mixed evenly to obtain a viscous dispersion.

[0023] A certain volume of GO aqueous solution (approximately 20ml, 0.2mg / ml) was passed through a cellulose ester film (0.22μm pore size) with a filter device to deposit a skin layer. After the water is basically removed and there is no liquid layer in the suction cup, continue to filter the CNF aqueous suspension. After the water is basically removed and there is no liquid layer in the suction cup, add the same volume of GO suspension.

[0024] After the composite membra...

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PUM

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Abstract

The invention discloses a method for preparing a thin high-strength composite heat-conducting functional film of a sandwich structure. Reduced graphene is integrated on a nano cellulose core layer through in-situ anchored nano copper, the sandwich structure which is very effective for heat conduction is formed, and the product has the functions of efficient heat conduction, electric conduction, electromagnetic shielding and the like. The method can also be applied to other ionic polymer core layers similar to nanocellulose and other microstructure matrix surfaces with firmly grown and loaded nano-copper. The thickness of the obtained film is controllable from several microns to hundreds of microns. The method is simple and easy to implement, low in cost and good in using effect.

Description

technical field [0001] The invention relates to the research field of nanometer materials and functional materials, in particular to a method for preparing a thin, high-strength composite heat-conducting functional film with a sandwich sandwich structure. Background technique [0002] "Hot spots" caused by insufficient thermal conductivity of the substrate are becoming more common in electrical and electronic products, causing significant droop and overheating damage. It is imperative to develop advanced thermal interface materials. Graphene is the material with the best thermal conductivity known in the world. Its intrinsic thermal conductivity is as high as 5300W / mK, and its ultra-high carrier mobility of 200000cm is also outstanding. 2 / (vs) and a Young's modulus of 1.06Tpa. [0003] It is difficult to achieve outstanding thermal conductivity of thermally conductive materials directly blended with graphene and polymer materials. The processing technology of existing hig...

Claims

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Application Information

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IPC IPC(8): D06M10/00D06M13/513D06M11/74C08L7/00C08L77/10C08K9/12C08K3/04C08J5/06D06M101/36
CPCD06M10/001D06M13/513D06M11/74C08J5/06D06M2101/36C08J2307/00C08J2477/10C08K9/12C08K3/042
Inventor 熊玉竹单博李一航杨航
Owner GUIZHOU UNIV
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