Carbon nano tube Poisson ratio material

A technology of carbon nanotubes and carbon nanotube films, applied in the field of Poisson's ratio materials, to achieve the effect of expanding the scope of application

Inactive Publication Date: 2010-10-27
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, there is no material with both positive and negative Poisson's ratio properties in the prior art

Method used

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preparation example Construction

[0032] The carbon nanotube array provided in the embodiment of the present invention is one or more of a single-wall carbon nanotube array, a double-wall carbon nanotube array, and a multi-wall carbon nanotube array. In this embodiment, the preparation method of the carbon nanotube array adopts the chemical vapor deposition method, and its specific steps include: (a) providing a flat substrate, which can be a P-type or N-type silicon substrate, or an oxide layer formed thereon silicon substrate, the present embodiment preferably adopts a 4-inch silicon substrate; (b) uniformly form a catalyst layer on the surface of the substrate, and the catalyst layer material can be selected from iron (Fe), cobalt (Co), nickel (Ni) or One of alloys in any combination; (c) annealing the substrate formed with the catalyst layer in air at 700-900°C for about 30 minutes to 90 minutes; (d) placing the treated substrate in a reaction furnace, Heating to 500-740° C. under a protective gas environm...

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Abstract

The invention provides a carbon nano tube Poisson ratio material which comprises a carbon nano tube membrane structure, wherein the carbon nano tube membrane structure comprises a plurality of carbon nano tubes, the carbon nano tubes are respectively arranged in a first direction and a second direction, the first direction is perpendicular to the second direction, and the carbon nano tubes arranged in the first direction and the carbon nano tubes arranged in the second direction are arranged in an overlapping and crossing mode. The carbon nano tube Poisson ratio material further comprises a flexible macromolecule basal body, wherein the carbon nano tube membrane structure is uniformly arranged in the flexible macromolecule basal body. The carbon nano tube Poisson ratio material can be used for manufacturing leather belts, safety belts and the like.

Description

technical field [0001] The invention relates to a Poisson's ratio material. Background technique [0002] Poisson's Ratio is defined as the ratio of negative transverse shrinkage strain to longitudinal elongation strain. [0003] Expressed as: [0004] V ij =-ε i / ε j [0005] Where: ε i represents the transverse shrinkage strain, ε j Indicates the longitudinal elongation strain. i, j are two mutually perpendicular coordinate axes respectively. The positive Poisson's ratio effect means that when the material is stretched, the material shrinks laterally within the elastic range; while when compressed, the material expands laterally. That is, when these materials are stretched, the transverse direction of the material shrinks. It is generally believed that almost all materials have a positive Poisson's ratio, about 0.3, 0.5 for rubber materials, 0.33 for metal aluminum, 0.27 for copper, and 0.1 to 0.4 for typical polymer foams. The Negative Poisson's Ratio effect me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/00
CPCC01B31/0226B32B5/26B32B27/08B29C55/005C01B2202/36B32B27/04C01B2202/08B82Y40/00B82Y30/00B32B5/022B32B5/22B32B3/04B32B2250/20B32B2260/023B32B2260/046B32B2262/106B32B2307/50C01B32/16Y10T428/24124Y10S264/73Y10S977/742B29C55/00B29C55/04
Inventor 陈鲁倬刘长洪王佳平范守善
Owner TSINGHUA UNIV
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