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Carbon nano particles, preparation method and transparent conductive polymer composite material containing said carbon nano particles

A technology of carbon nanoparticles and composite materials, applied in rods or other shapes, can solve the problems of ineffective formation of transparent composite materials, low transparency, and expensive carbon nanotubes

Inactive Publication Date: 2004-02-25
DONG WOON INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the above method requires the use of a strong acid, such as sulfuric acid, which makes the surface treatment step difficult, and the composite material containing such surface-treated carbon nanotubes is less transparent than indium tin oxide (ITO)
[0009] Therefore, currently known carbon nanotubes cannot effectively form transparent composites due to the limitation of the particle size of carbon nanotubes or the limitations of their processing methods.
[0010] Moreover, since the currently developed methods include a step of evaporating carbon atoms, carbon nanotubes prepared by this method are relatively expensive; therefore, mass production based on these methods is not possible

Method used

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  • Carbon nano particles, preparation method and transparent conductive polymer composite material containing said carbon nano particles
  • Carbon nano particles, preparation method and transparent conductive polymer composite material containing said carbon nano particles
  • Carbon nano particles, preparation method and transparent conductive polymer composite material containing said carbon nano particles

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Experimental program
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Embodiment 1

[0062] About 80 ml of distilled water was added to a 1 L reactor equipped with a constant temperature bath set at 25°C. Thereafter, 6 g of dodecyltrimethylammonium bromide (DTAB) was added, followed by stirring at a rate of about 400 rpm, to form micelles. Slowly drop 2 g of pyrrole monomer into the reactor using a dropper. 11.12g FeCl 3 (Pyrrole / FeCl 3 The molar ratio=1 / 2.3) was dissolved in 10ml of distilled water, and then this solution was added to the reactor. After stirring at 25°C for about 4 hours, about 500 ml of methanol was added to the reactor to break up the micelles. Transfer the reaction solution to a separatory funnel, then shake the separatory funnel steadily several times to help mix the solution. In order to improve the separation rate of the synthesized polymer nanoparticles (polypyrrole nanoparticles), about 100 ml of isooctane was added to the separatory funnel as a non-solvent. Use a pipette to transfer the upper layer of isooctane and methanol, the...

Embodiment 2

[0065] With the ratio of 1% by weight, 3% by weight and 10% by weight, the carbon nanoparticle solution with an average particle diameter of 2nm prepared in Example 1 was blended (solution-blend) in polycarbonate (average molecular weight: 13,800) middle. The blend was then spin-coated on coverslips at a thickness of 270 nm (measured by the alpha-step method) to prepare films. Tetrahydrofuran (THF) was used as a solvent for solution blending. As a comparison, non-carbonized polymer nanoparticles (polypyrrole nanoparticles) and carbon nanotubes (from Aldrich Corporation) not subjected to the carbonization treatment of Example 1 were respectively blended with a polycarbonate solution to prepare a film. The transmittance of the film was measured in the visible region using a UV / VIS spectrophotometer. Table 1 below shows the average transmittance based on the wavelength. Such as figure 1 As shown, carbon nanoparticles have higher average transmittance than carbon nanotubes. F...

Embodiment 4

[0069] The ferromagnetism of the carbon nanoparticles prepared in Example 1 with an average particle diameter of 2 nm was measured as a function of temperature using a superconducting quantum interference device (SQUID). The measurement temperature range is 5K to 300K, and the applied magnetic field strength is 100Oe (Oersted). The above measurement results are shown in Figure 4 middle. Such as Figure 4 As shown, the magnetic anisotropy coefficient value (magnetic anisotropic coefficient value) obtained based on the measured value is 2.4×10 8 erg / cm 3 , which means that the carbon nanoparticles of the present invention have ferromagnetism.

[0070] As described above, the carbon nanoparticle of the present invention is a novel material that has not been disclosed so far in the technical field to which the present invention pertains. Since the carbon nanoparticle of the present invention has a particle diameter below 1 / 2 of the shortest wavelength of visible light, even ...

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Abstract

The present invention relates to a novel carbon nano-particle and a novel method of preparing the same and a transparent, conductive polymer composite containing the same. The carbon nano-particle has the mean diameter of 1 through 50 nm and the shape of sphere, rod or others, which is a novel material not known in the relevant art. Because of a particle size less than 1 / 2 of the shortest wavelength of a visible ray, a transparent resin containing the carbon nano-particle can maintain the transparency. Furthermore, the carbon nano-particle has the excellent electric conductivity and the ferromagnetic property, and can be made by a novel, low cost method entirely different from those of fullerene and carbon nanotube.

Description

technical field [0001] The invention relates to a new type of carbon nanoparticle, its preparation method and a transparent conductive polymer composite material containing the new type of carbon nanoparticle. More specifically, the present invention provides a novel carbon nanoparticle in which carbon atoms forming the particle are bonded in a graphitic structure, the particle has an average particle diameter of 1 to 50 nm, preferably 1 to 10 nm and has spheres, rods or other shape, the present invention also provides a novel method of preparing carbon nanoparticles and polymer composites containing said carbon nanoparticles, said polymer composites have transparency and excellent electrical conductivity, and in any case have iron magnetic. Background technique [0002] In recent years, information technology (IT), biotechnology (BT) and nanotechnology (NT) have attracted widespread attention as highly developed technologies. Among them, in-depth research on nanotechnolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C01B31/02C08K3/04C08L69/00H01B1/24
CPCB82Y10/00Y10S977/838C08K2201/011H01B1/24Y10S977/788B82Y30/00Y10S977/773Y10S977/742C01B31/02C08K3/04C01B32/05Y10T428/265Y10T428/29Y10T428/2982
Inventor 张正植吴俊鹤金东喆
Owner DONG WOON INT