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Preparation method of carbon nano tube composite coating

A carbon nanotube composite and carbon nanotube technology, which is applied in the field of coating nanomaterials, can solve the problems of limiting the promotion and application of carbon nanotube composite films, the preparation and acquisition of self-assembly methods, and the low assembly efficiency, so as to improve the preparation speed, The effect of easy industrial production and simple preparation method

Active Publication Date: 2015-04-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction time between the components depends on the residence time of the liquid film. If the reaction between the components is slow, it will not be conducive to the adsorption of the components on the surface of the substrate in the limited liquid film residence time, so that the film The assembly efficiency is low
It has been found through experiments that the carbon nanotube composite film prepared by the above-mentioned patent cannot be prepared by spraying layer self-assembly method without improvement, which limits the promotion and application of the carbon nanotube composite film

Method used

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  • Preparation method of carbon nano tube composite coating
  • Preparation method of carbon nano tube composite coating
  • Preparation method of carbon nano tube composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) ultrasonically disperse carbon nanotubes (1 mg / mL) in a solution of 10 mM tris-hydrochloric acid at pH = 8.5, then add one ten-thousandth part of dopamine and stir for 48 hours to obtain polydopamine-modified Dispersion of carbon nanotubes (CNTPDA);

[0046] (2) Add ferric chloride solution (0.1M) to the CNTPDA dispersion to adjust the iron ion concentration to 4.5mM, and adjust the pH to 3 with hydrochloric acid or sodium hydroxide solution to obtain assembly solution A;

[0047] (3) Polyethyleneimine (PEI) was dissolved in deionized water to prepare a 2 mg / mL PEI solution, and the pH was adjusted to 12 with sodium hydroxide to obtain assembly solution B;

[0048] (4) Place the substrate vertically, install the assembly solution A and the assembly solution B in two hand-held watering cans respectively, control the distance between the nozzle and the substrate to be 10 to 20 cm (subject to the complete coverage of the substrate), and spray the direction perpendicul...

Embodiment 2

[0053] (1) ultrasonically disperse carbon nanotubes (1mg / mL) in a solution of 10mM sodium carbonate-sodium bicarbonate solution at pH=8.5, then add one ten-thousandth part of dopa and stir for 48 hours to obtain polydopamine-modified Dispersion of carbon nanotubes (CNTPDA);

[0054] (2) Add chromium chloride solution (0.1M) to the CNTPDA dispersion to adjust the chromium ion concentration to 2.5mM, and adjust the pH to 3 with hydrochloric acid or sodium hydroxide solution to obtain assembly solution A;

[0055] (3) Polylysine was dissolved in deionized water to form a 1 mg / mL solution, and the pH was adjusted to 12 with sodium hydroxide to obtain assembly solution B;

[0056] (4) Place the substrate vertically, install the assembly solution A and the assembly solution B in two hand-held watering cans respectively, control the distance between the nozzle and the substrate to be 10 to 20 cm (subject to the complete coverage of the substrate), and spray the direction perpendicul...

Embodiment 3

[0060] (1) ultrasonically disperse carbon nanotubes (1 mg / mL) in a solution of 10 mM tris-hydrochloric acid at pH = 8.5, then add one ten-thousandth part of dopamine and stir for 16 hours to obtain polydopamine-modified Dispersion of carbon nanotubes (CNTPDA);

[0061] (2) Add aluminum sulfate solution (0.1M) to the CNTPDA dispersion to adjust the aluminum ion concentration to 4.5mM, and adjust the pH to 4 with hydrochloric acid or sodium hydroxide solution to obtain assembly solution A;

[0062] (3) Dissolving polydiallyldimethylammonium chloride in deionized water to make a 2 mg / mL solution, adjusting the pH to 10 with sodium hydroxide, to obtain assembly solution B;

[0063] (4) Place the substrate vertically, install the assembly solution A and the assembly solution B in two hand-held watering cans respectively, control the distance between the nozzle and the substrate to be 10 to 20 cm (subject to the complete coverage of the substrate), and spray the direction perpendic...

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Abstract

The invention discloses a preparation method of a carbon nano tube composite coating. According to the preparation method, a solution containing a catecholamine-modified carbon nano tube is taken as an assembly solution A; a water-soluble polymer solution with amino is taken as an assembly solution B; the assembly solution A and the assembly solution B are alternately coated on the surface of a substrate material; the assembly solution A also contains precursors of trivalent metal ions; the pH value of the assembly solution A is 1-6; the pH value of the assembly solution is 8-12; and the coating mode is spraying. The surface of the coating prepared by the method has an obvious micro and nano composite structure; the coating thickness and the surface aggregate density are controllable; the carbon nano tube composite coating has good stability after being subjected to heat treatment, and can be applied to preparation of large-area coatings; and the operation is simple and fast.

Description

technical field [0001] The invention relates to the technical field of coating nanomaterials, in particular to a preparation method of a carbon nanotube composite coating. Background technique [0002] Due to its unique electromagnetic, mechanical, chemical, optical and thermal conductivity properties, carbon nanotube composite coatings have good applications in nanoelectronic devices, flat panel displays, electrochemical detection, sensors and pollutant separation, and even tissue engineering materials. Potential application prospects have aroused extensive interest and attention of researchers in recent years. [0003] The common preparation methods of carbon nanotube polymer-based composite coatings mainly include spin coating method, suction filtration method, liquid phase chemical deposition method and solution blending method. However, in the above methods, the phase separation problem between carbon nanotubes and polymers cannot be well resolved, so the advantages of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/04B82Y40/00
CPCB82Y40/00C23C24/04
Inventor 计剑任科峰徐晗汤建国
Owner ZHEJIANG UNIV
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