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Carbon nano tube surface functionalization method

A technology of surface functionalization and carbon nanotubes, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve problems such as carbon nanotube structure damage, improve interface stability, simple steps, and improve adhesion performance Effect

Inactive Publication Date: 2013-03-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And solve the strong acid oxidation treatment of carbon nanotubes, which is a traditional carbon nanotube surface activation method, which causes damage to the carbon nanotube structure. More tha

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] Such as figure 1Shown in (1), a preparation method of dopamine-coated carbon nanotubes, the method comprises the following steps:

[0032] Prepare a dopamine hydrochloride solution with a concentration of 2.0g / L, add tris (trishydroxymethylaminomethane) buffer substance, adjust the pH of the solution to about 8.5, wash a certain amount (0.2g / 100mL) and dry it Place the carbon nanotubes in the prepared solution, stir and ultrasonically disperse for 20mins, then stir for 24 hours to prepare dopamine-coated carbon nanotubes (CNTs-PDA), and the obtained CNTs-PDA is washed 4 times with deionized water Then dry for future use.

[0033] From figure 2 The analysis of the sample C1s before and after dopamine deposition shows that before and after the deposition of dopamine, the carbon nanotube surface C element binding state has a unique C-N structure of dopamine, and the disappearance of carboxyl bound carbon and the appearance of carbonyl carbon all indicate that dopamine h...

Embodiment 2

[0035] After the carbon nanotubes are coated with dopamine, the preparation method of the functionalized carbon nanotubes CNTs-PDA-GMA which is further functionalized by GMA:

[0036] Such as figure 1 As shown in (2), prepare a reaction solution with a volume ratio of water and N-N dimethylformamide (DMF) of 2:1, and add the dry dopamine-coated carbon nanotubes obtained in Example 1 at a rate of 0.1 g / 100 mL, After ultrasonic dispersion for 10 minutes, add the secondary functionalized monomer GMA, the monomer addition amount is 5 g / L, adjust the pH value of the reaction solution to 8.5, and react at the temperature of 60, 80, 100, and 120 degrees Celsius respectively After 4 hours, the obtained secondary functionalized carbon nanotubes were washed three times with ethanol and three times with deionized water, and then dried to obtain the final product.

[0037] Such as figure 1 As shown in (2), prepare a reaction solution with a volume ratio of water and N-N dimethylformamid...

Embodiment 3

[0043] Such as figure 1 As shown in (3), prepare a reaction solution with a volume ratio of water and ethanol of 2:1, add the dry dopamine-coated carbon nanotubes obtained in Example 1 at a rate of 0.1 g / 100 mL, and ultrasonically disperse for 10 minutes. Secondary functionalized monomeric silane coupling agent, the amount of monomer added is 1, 2.5, 5 g / L respectively, adjust the pH value of the reaction solution to 8, react for 5 hours, and the obtained secondary functionalized carbon nanotubes are washed with ethanol in turn 3 times, washed with deionized water for 3 times and then dried to obtain the final product.

[0044] Such as figure 1 As shown in (3), prepare a reaction solution with a volume ratio of water and ethanol of 2:1, add the dry dopamine-coated carbon nanotubes obtained in Example 1 at a rate of 0.1 g / 100 mL, and ultrasonically disperse for 10 minutes. Secondary functionalized monomeric silane coupling agent, the amount of monomer added is 2.5g / L, the pH ...

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Abstract

The invention relates to a carbon nano tube surface functionalization method. The method comprises the following steps of: performing surface coating treatment to a carbon nano tube through a dopamine hydrochloride biomimetic modification method, and performing surface functionalization grafting treatment to the dopamine-modified carbon nano tube through a second functionalization monomer. The method aims to improve the dispersibility of the carbon nano tube in a rubber matrix and the bonding performance of the carbon nano tube with a rubber interface, therefore, the problems of dispersing in the matrix and the poor interfacing bonding of the conventional non-modified carbon nano tube are solved; a series of problems such as damage to the carbon nano tube, environment pollution and complicated technical process, due to strong acid corrosion oxidation treatment in the conventional carbon nano tube surface modification method are prevented; and the technical process is simplified and the produced modified carbon tube is excellent in performance.

Description

technical field [0001] The invention relates to a method for functionalizing the surface of carbon nanotubes, which aims to improve the dispersion of carbon nanotubes and the interface bonding performance with other materials, so that carbon nanotubes can exert more excellent performance when applied to the preparation of composite materials . Background technique [0002] As we all know, since Lijima reported the discovery of carbon nanotubes in 1991, carbon nanotubes have become a research hotspot in the field of nano-functional materials because of their unique topology. Carbon nanotubes have super mechanical properties, high chemical and thermal stability, and good electrical properties. Quasi-one-dimensional quantum wires. Therefore, it has extremely broad application prospects in the fields of nano-devices, microelectronics, and functional composite materials. The reason why carbon nanotubes have so many advantages is mainly due to the sp between carbon atoms. 2 Hy...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B32/174
Inventor 王文才卢咏来汤苗苗张立群刘力田明赵秀英温世鹏
Owner BEIJING UNIV OF CHEM TECH
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