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Carbon nanotube microwave absorption membrane

A carbon nanotube film, carbon nanotube technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc. and other problems to achieve the effect of improving the absorption characteristics

Active Publication Date: 2013-07-03
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the microwave absorbing material containing carbon nanotubes prepared by this method, the dispersion performance of the carbon nanotubes in the polymer is poor and easy to agglomerate, which in turn affects the absorbing properties of the microwave absorbing material containing carbon nanotubes

Method used

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Embodiment Construction

[0016] See figure 1 , The embodiment of the present invention provides a method for preparing a carbon nanotube microwave absorbing film. The preparation method of the carbon nanotube microwave absorbing film includes the following steps: (S10), dissolving polyvinylidene fluoride in a first solvent to form a polyvinylidene fluoride solution; (S11), forming a carbon nanotube film immersing the carbon nanotube film-like structure in the polyvinylidene fluoride solution; (S12), transferring the carbon nanotube film-like structure from the polyvinylidene fluoride solution to a second solvent, the polyvinylidene fluoride slightly soluble or hardly soluble in the second solvent, the first solvent is soluble in the second solvent, and the boiling point of the second solvent is lower than that of the first solvent; and (S13), the carbon nanotubes The film structure is taken out from the second solvent and dried to form the carbon nanotube microwave absorbing film.

[0017] Step S10 ...

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Abstract

The invention provides a carbon nanotube microwave absorption membrane, comprising a carbon nanotube membrane-like structure and polyvinylidene fluoride, wherein the carbon nanotube membrane-like structure comprises a plurality of uniformly distributed carbon nanotubes, and at least a part of polyvinylidene fluoride is filled in the carbon nanotube membrane-like structure.

Description

technical field [0001] The invention relates to a carbon nanotube microwave absorbing film. Background technique [0002] Since the Japanese scientist Sumio Iijima first discovered carbon nanotubes (Carbon Nanotubes, CNTs) in 1991, nanomaterials represented by carbon nanotubes have attracted great attention for their unique structures and properties. In recent years, with the continuous deepening of research on carbon nanotubes and nanomaterials, their broad application prospects continue to emerge. For example, due to the unique electromagnetic, optical, mechanical, and chemical properties of carbon nanotubes, they have broad application prospects in fields such as field emission electron sources, ultra-thin flat-panel displays, cathode electrodes, and biosensors. [0003] A microwave absorbing material containing carbon nanotubes and a preparation method thereof are provided in the prior art, comprising: dispersing a plurality of carbon nanotubes in a polymer solution, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08K7/00C08K3/04C09K3/00
CPCB82Y30/00C08J5/005C08J2327/16C08K2201/011C08K3/041Y10T428/263Y10T428/30Y10T428/249945C08K7/24C08L27/16
Inventor 熊伟王佳平姜开利范守善
Owner TSINGHUA UNIV
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