CNT mass and assembly, and layered product

A technology of aggregates and laminates, applied in the direction of nano-carbon, thin material processing, nanotechnology for materials and surface science, etc., can solve the problem of losing viscoelastic properties, and achieve the effect of excellent shock absorption

Inactive Publication Date: 2013-04-24
NAT INST OF ADVANCED IND SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the viscoelastic properties of conventional viscoelastic materials show a very large temperature dependence, and the viscoelastic properties are lost at low or high temperatures

Method used

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  • CNT mass and assembly, and layered product
  • CNT mass and assembly, and layered product
  • CNT mass and assembly, and layered product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0155] An example of the above-mentioned CNT aggregate of the present invention will be described in detail below. In addition, the following Examples are an example, and this invention is not limited to them.

[0156] (Method for producing CNT aggregates)

[0157] The CNT assembly of the present embodiment of the present invention uses a 1 cm square silicon substrate with an oxide layer (600 nm), and is formed on the upper surface of the substrate 10 by high-frequency cathode sputtering (RF cathode sputtering) method and is made of aluminum oxide ( Al2O3) composed of a 30nm-thick co-catalyst layer. Next, a catalyst layer made of iron (Fe) with a thickness of 2 nm was formed on the alumina layer by RF cathode sputtering.

[0158] The substrate 10 on which the co-catalyst layer and the catalyst layer were formed was processed by RIE. At back pressure 5 x 10 -3 In the RIF apparatus of Pa, the substrate 10 on which the co-catalyst layer and the catalyst layer were formed was ...

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Abstract

Provided is a CNT assembly including CNT masses which each shows the same stable viscoelasticity as at room temperature even under higher-temperature conditions and / or lower-temperature conditions than conventional silicone rubbers or CNT-containing rubbers, and which each has excellent impact absorption. The CNT mass is configured of a plurality of CNTs and has a storage modulus at 25 C obtained through a dynamic viscoelasticity measurement made in the shear mode at a frequency of 1 Hz (G25 C') of 104-109 Pa, a loss modulus at 25 C obtained through a dynamic viscoelasticity measurement made in the shear mode at a frequency of 1 Hz (G25 C") of 103-108 Pa, and a loss tangent at 25 C obtained through a dynamic viscoelasticity measurement made in the shear mode at a frequency of 1 Hz (tand (=G25 C" / G25 C')) of 10-3-1. The CNT mass has a pore diameter distribution maximum determined by the BJH method from the liquid-nitrogen adsorption isotherm of 50 nm or less.

Description

technical field [0001] The present invention relates to a viscoelastic body excellent in impact absorption. In particular, it relates to a CNT aggregate including an aggregate of carbon nanotubes (hereinafter, referred to as CNT) exhibiting stable viscoelasticity over a wide temperature range, a laminate, and methods for producing them. Background technique [0002] The so-called viscoelastic body is a member having both viscosity to dissipate energy and elasticity to deform reversibly. In general, elasticity is produced by the bonds of the constituent elements of the part, while viscosity is produced by the thermal motion of the constituent elements. In the case of rubber, which is a typical viscoelastic body, elasticity is generated by crosslinked chain polymers constituting the rubber, and the chain parts between crosslinks are free to move to generate viscosity. [0003] Rubber containing chain-like polymers slows down the movement of the chain-like parts at low temper...

Claims

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Application Information

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IPC IPC(8): C01B31/02
CPCC01B31/0226B82Y30/00B82Y40/00F16F7/01C01B31/022C01B32/16Y10T428/249967
Inventor 畠贤治丹·N.·弗塔巴徐鸣
Owner NAT INST OF ADVANCED IND SCI & TECH
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