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Carbon nano tube composite film and preparation method thereof

A technology of carbon nanotube composite and carbon nanotubes, which is applied in the direction of carbon compounds, nanotechnology, nanotechnology, etc., can solve the problems of complexity, weak non-covalent interaction, time-consuming processing, etc., and achieve low equipment requirements, Mild reaction conditions and wide application range

Active Publication Date: 2013-12-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the preparation method disclosed in the above-mentioned patent documents, the layers are combined through non-covalent interaction force, but the non-covalent interaction is weak, resulting in poor stability of the prepared carbon nanotube composite film, which requires further post-processing. Treatment to achieve chemical cross-linking, but the process is time-consuming and complicated (Mamedov AA, Kotov NA, Prato M, Guldi DM, Wicksted JP, Hirsch A. Molecular design of strong single-wall carbon nanotube / polyelectrolyte multilayer composites.[J ]Nature materials,2002,1(3):190-194.), thus limiting the promotion and practical application of carbon nanotube composite films

Method used

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  • Carbon nano tube composite film and preparation method thereof
  • Carbon nano tube composite film and preparation method thereof
  • Carbon nano tube composite film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0051] (1) Ultrasonically disperse carbon nanotubes (1mg / mL) in a solution of 10mM tris-hydrochloric acid at pH=8.5, then add one part per ten thousand of dopamine and stir for 48 hours to obtain polydopamine-modified Dispersion of carbon nanotubes (CNTPDA);

[0052] (2) Dissolve polyethyleneimine (PEI) in deionized water (adjust the pH to 9 with hydrochloric acid) to prepare a 2 mg / mL PEI solution;

[0053] (3) Soak the cleaned silicon wafer completely in 2mg / mL PEI solution, take it out after 15 minutes, wash it with deionized water, and then dry it with nitrogen;

[0054] (4) Soak the silicon wafer obtained in step (3) completely in the CNTPDA dispersion, take it out after 15 minutes, wash it with deionized water, and then dry it with nitrogen;

[0055] (5) After repeating steps (3) to (4) 20 times, take out the silicon wafer, wash it with deionized water and blow it dry with nitrogen, then soak the silicon wafer in 2 mg / mL PEI solution for 15 minutes, then use After wash...

Embodiment 2

[0059] (1) Ultrasonically disperse carbon nanotubes (2 mg / mL) in a solution of 10 mM tris-hydrochloric acid at pH = 8.5, then add one part per ten thousand of dopamine and stir for 16 hours to obtain polydopamine-modified Dispersion of carbon nanotubes (CNTPDA);

[0060] (2) Dissolve polyethyleneimine (PEI) in deionized water (adjust the pH to 9 with hydrochloric acid) to prepare a 0.5 mg / mL PEI solution;

[0061] (3) Coat the surface of the cleaned silicon wafer with a layer of acetone solution of cellulose acetate; wait for the acetone to volatilize naturally for later use.

[0062] (4) Soak the silicon wafer pre-coated with cellulose acetate in 0.5 mg / mL PEI solution, take it out after 15 minutes, wash it with deionized water, and then dry it with nitrogen;

[0063] (5) Soak the silicon wafer obtained in step (3) completely in the CNTPDA dispersion, take it out after 15 minutes, wash it with deionized water, and then dry it with nitrogen;

[0064] (6) After repeating step...

Embodiment 3

[0070] (1) Ultrasonically disperse carbon nanotubes (1mg / mL) in a solution of 10mM tris-hydrochloric acid at pH=8.5, then add one part per ten thousand of dopamine and stir for 48 hours to obtain polydopamine-modified Dispersion of carbon nanotubes (CNTPDA);

[0071] (2) Dissolve polyethyleneimine (PEI) in deionized water (adjust the pH to 9 with hydrochloric acid) to prepare a 2 mg / mL PEI solution;

[0072] (3) Soak the cleaned silicon wafer completely in 2mg / mL PEI solution, take it out after 15 minutes, wash it with deionized water with pH=9, and then dry it with nitrogen;

[0073] (4) Soak the silicon wafer obtained in step (3) completely in the CNTPDA dispersion, take it out after 15 minutes, wash it with deionized water, and then dry it with nitrogen;

[0074] (5) After repeating steps (3) to (4) 20 times, take out the silicon wafer, wash it with deionized water, and then dry it with nitrogen, then soak the silicon wafer in 2 mg / mL PEI solution for 15 minutes, and then ...

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Abstract

The invention discloses a preparation method for a carbon nano tube composite film. The method comprises the following steps: first, allowing a phenolic hydroxyl group, a quinonyl group and other functional groups to be introduced on the surface of a carbon nano tube through oxidation autopolymerization reaction of catecholamine under an alkalescence condition, so as to realize the modification for the surface of the carbon nano tube; then, using water-soluble polymers with amino groups or mercapto groups as raw materials to realize layer-by-layer self-assembly under the action of chemical bonds formed by Schiff base or Michael Addition reaction, thereby obtaining the carbon nano tube composite film. The method has the advantages of mild reaction condition, environmental protection, simplicity and feasibility, and is suitable for industrialized production. The carbon nano tube composite film prepared by the method has the advantages of excellent thermal and chemical stability, ductility, mechanical strength and transparency.

Description

technical field [0001] The invention relates to a preparation method of thin-film nanomaterials, in particular to a preparation method of a carbon nanotube composite film and the prepared carbon nanotube composite film. Background technique [0002] In recent years, carbon nanotube composite thin films have attracted widespread interest and great attention due to their unique mechanical, electromagnetic, optical, chemical and thermal conductivity properties. Based on its unique physical and chemical properties, carbon nanotube composite films have good potential application prospects in nanoelectronic devices, flat panel displays, electrochemical detection, sensors, pollutant separation and even tissue engineering materials. [0003] The preparation methods of carbon nanotube composite films usually include vacuum filtration method, spin coating method, liquid phase chemical deposition method and solution blending method, etc. However, due to the high specific surface area ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00C01B32/168
Inventor 计剑任科峰王金磊
Owner ZHEJIANG UNIV
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