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Carbon nano-tube oriented film, preparation method and applications thereof

A carbon nanotube, oriented film technology, applied in the direction of carbon nanotubes, single-walled carbon nanotubes, oriented carbon nanotubes, etc., can solve problems such as winding, and achieve the effect of solid material guarantee

Active Publication Date: 2020-03-24
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the physical adsorption method can overcome some defects of the chemical modification method, most of the polymers used are electrically neutral molecules without charge, and there is no repulsion between monodispersed CNTs, and it is easy to entangle and overlap due to van der Waals force. catch

Method used

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  • Carbon nano-tube oriented film, preparation method and applications thereof
  • Carbon nano-tube oriented film, preparation method and applications thereof
  • Carbon nano-tube oriented film, preparation method and applications thereof

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preparation example Construction

[0067] Another aspect of the embodiments of the present invention also provides the aforementioned method for preparing the carbon nanotube dispersion, which includes:

[0068] At least mix the carbon nanotube powder raw material, the polymer as the carbon nanotube dispersant, and the solvent to form the first dispersion, and make the polymer specifically combine with the selected carbon nanotubes, and then from the second Separation of carbon nanotubes with polymers bound to their surfaces from a dispersion;

[0069] Mixing at least the carbon nanotubes with polymers bound on the surface, aromatic molecules and solvent to form a second dispersion, and combining the aromatic molecules with the selected carbon nanotubes and making the selected carbon nanotubes the surface of the tubes is charged with the same type, and then the carbon nanotubes with the polymer and aromatic molecules bound to the surface are separated from the second dispersion; and

[0070] The carbon nanotub...

Embodiment 1

[0139] 1) On the basis of general procedure 1.1, refer to CN108017049A, adjust the feeding ratio of carbazole linear copolymer (PCz) and single-wall carbon nanotube raw material (obtained from the market, made by arc discharge method) to 1:1 (The following are mass ratios unless otherwise specified.) Toluene was used as a dispersant. After ultrasonic dispersion and centrifugation, the toluene dispersion of high-purity s-SWCNTs dispersed in the polymer was obtained.

[0140] 2) Refer to the general step 1.2 to obtain the first powder.

[0141] 3) Redisperse the first powder obtained in step 2) into a chloroform solution of proflavin sulfate (PFS) with a mass concentration of 0.02 mg / mL to obtain a chloroform dispersion of high-purity s-SWCNTs with electrostatic repulsion introduced between the tubes liquid.

[0142] 4) Refer to the general step 1.4 to obtain the high-purity s-SWCNTs solid powder (ie, the second powder) with electrostatic repulsion introduced between the tubes...

Embodiment 2

[0149] 1) On the basis of general procedure 1.1, referring to CN105819425A, the feed ratio of polycarbazole derivatives and single-walled carbon nanotube raw materials (obtained commercially, made by plasma discharge method) is adjusted to 2:1, and xylene is used as Dispersant. After ultrasonic dispersion and centrifugation, the xylene dispersion of high-purity s-SWCNTs dispersed in the polymer was obtained.

[0150] 2) Refer to the general step 1.2 to obtain the first powder.

[0151] 3) Redisperse the first powder obtained in step 2) into a dichloromethane solution of neutral red (NR) with a mass concentration of 0.01 mg / mL to obtain high-purity s-SWCNTs with electrostatic repulsion between the tubes. Methyl chloride dispersion

[0152] 4) Refer to the general step 1.4 to obtain a high-purity s-SWCNTs solid powder (ie, the second powder) with electrostatic repulsion introduced between the tubes and free neutral red (NR) molecules removed.

[0153] 5) Redisperse the second...

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Abstract

The invention discloses a carbon nano-tube oriented film, a preparation method and applications thereof. The preparation method comprises the following steps: providing a carbon nano-tube dispersion liquid, wherein the carbon nano-tube dispersion liquid comprises selected carbon nano-tubes, a polymer used as a carbon nano-tube dispersant and specifically bound to the selected carbon nano-tubes, aromatic molecules bound to the selected carbon nano-tubes to have the same charge on the surface, and an organic solvent at least used for being matched with other components of the dispersion liquid to form a uniform dispersion liquid, and further a water phase layer can be introduced into the upper surface of the dispersion liquid to form a double-layer liquid phase system, then a substrate is partially or completely inserted into the double-layer liquid phase system, and then the substrate is lifted out to form the carbon nano-tube oriented film on the surface of the substrate. The preparation method is simple and efficient, and the large-area continuous oriented carbon nano-tube film can be easily prepared in an amplified mode.

Description

technical field [0001] The invention relates to a nano-carbon material, in particular to a carbon nanotube oriented film and its preparation method and application, belonging to the technical field of carbon nano-materials. Background technique [0002] Carbon nanotubes (crabon nanotubes, CNTs) have received extensive attention from the public due to their excellent mechanical, optical, and electrical properties, and have gained preliminary research in the fields of optoelectronic devices, electronic devices, mechanical materials, conductive materials, and composite materials. application. However, CNTs are tubular nanomaterials with a large aspect ratio and specific surface area. At the same time, there is a strong van der Waals force between CNTs, which makes them prone to entanglement and agglomeration. Therefore, it is difficult to disperse in the matrix, which seriously restricts product performance. Therefore, how to uniformly and stably disperse CNTs is a key proble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/174H10K99/00
CPCC01B32/174C08J2365/00C08J5/18C01B2202/34C01B2202/28C01B2202/08C01B32/168C08K3/041Y02E10/549Y02P70/50H10K71/15H10K85/225C08K3/042C08K9/04C01B2202/02H10K85/221C01B32/159C01B32/16C09D7/65C09D7/20C09D7/45C09D7/63C01B2202/22C09D1/00C09D5/24
Inventor 高冰邱松金赫华李清文
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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