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Method and device for carboxylation modification of carbon nano-material by ozone and use thereof

A technology of carbon nanomaterials and nanomaterials, which is applied in the field of oxidation modification of nanomaterials, can solve the problems of long processing time and difficulty in regulating the proportion of oxygen-containing functional groups, and achieve the advantages of simple operation, important industrial value and application prospects, and low cost. Effect

Inactive Publication Date: 2015-09-09
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current method still has some limitations. For example, the treatment time is as long as tens of hours, and the relatively high ozone concentration makes it difficult to control the proportion of oxygen-containing functional groups on the surface of carbon nanotubes after ozone treatment.

Method used

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  • Method and device for carboxylation modification of carbon nano-material by ozone and use thereof
  • Method and device for carboxylation modification of carbon nano-material by ozone and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this example, see figure 1 and figure 2 , a device for carboxylation and modification of carbon nanomaterials using ozone, mainly including a reaction chamber device, a bubbling device is arranged before the reaction chamber device, an exhaust gas treatment device is arranged after the reaction chamber device, and the bubbling device adopts a sealed solvent Bottle 103, the bottle stopper of solvent bottle 103 is fixedly provided with air inlet pipe 101 and air outlet pipe 102, has good airtightness between the bottle body of solvent bottle 103 and the bottle stopper, puts solvent in solvent bottle 103, one end of air inlet pipe 101 Reaching below the liquid level of the solvent in the solvent bottle 103, the other end of the inlet pipe 101 communicates with the gas supply pipe of the reaction gas. The reaction chamber device 301 adopts a vertically placed "U" shaped reaction tube, and the "U" shaped reaction tube The "U"-shaped inner cavity forms a reaction chamber...

Embodiment 2

[0035] This embodiment is basically the same as Embodiment 1, especially in that:

[0036] A kind of method that utilizes ozone to carry out carboxylation modification to carbon nanometer material, use the reaction device identical with embodiment one, operation steps are as follows:

[0037] a. This step is identical with embodiment one;

[0038] B. adopt solvent bottle 103 as bubbling device, first open solvent bottle 103, the hydrogen peroxide of 60ml is injected in the solvent bottle 103 as solvent, then close the bottle stopper, the inlet pipe 101 is communicated with the ozone output pipe of ozone generator , turn on the ozone generator, control the ozone generator to prepare ozone with a volume percentage concentration of 3.6%, pass the ozone / oxygen mixed gas through the hydrogen peroxide in the solvent bottle 103, and make the ozone / oxygen mixed gas carry out solvent bubbling reaction;

[0039] c. This step is the same as the first embodiment.

Embodiment 3

[0041] This embodiment is basically the same as the previous embodiment, and the special features are:

[0042] A kind of method that utilizes ozone to carry out carboxylation modification to carbon nanometer material, use the reaction device identical with embodiment one, operation steps are as follows:

[0043] a. This step is identical with embodiment one;

[0044] B. adopt solvent bottle 103 as bubbling device, at first open solvent bottle 103, the mass concentration of 60ml is that the sodium hypochlorite solution of 5% is injected in solvent bottle 103 as solvent, closes bottle stopper again, air inlet pipe 101 and ozone generator The ozone output pipe is communicated, open the ozone generator, control the ozone generator to prepare the ozone with a volume percentage concentration of 3.6%, pass the ozone / oxygen mixed gas through the sodium hypochlorite solution in the solvent bottle 103, and make the ozone / oxygen mixed gas carry out the solvent drum Bubble reaction;

...

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Abstract

The invention discloses a method and device for carboxylation modification of carbon nano-material by ozone and a use thereof. The method utilizes solvent-assistant ozonolysis to realize carboxylation modification of a carbon nano-material and can greatly improve a ratio of a carboxyl functional group on the surface of the carbon nano-material. Through carbon nanotube sample ozonolysis modification aided by a sodium hypochlorite solution with a concentration of 5%, the highest ratio of carboxy groups of the modified carbon nanotubes to the total oxygen-containing groups is 71% or more, and a ratio of carboxyl groups of the sample un-modified by any solvents is only 54%. The method has the advantages of simple processes, low cost, high efficiency and environmental friendliness and has an important meaning for carbon nanotube functionalization and further chemical functionalization.

Description

technical field [0001] The invention relates to a modification method, device and application of nanomaterials, in particular to a method, device and application of oxidative modification of nanomaterials, which are applied in the technical field of nanomaterial functional preparation and large-scale production. Background technique [0002] Carbon nanotubes (CNTs) have received great attention in numerous applications over the past few decades due to their high aspect ratio, light weight, high flexibility, high mechanical strength, and excellent thermal and electronic properties. , such as heterogeneous catalyst supports, new carbon catalysts, lithium battery materials, sensor materials, and new polymer nanocomposites. [0003] However, due to the chemical inertness of the graphite structure of carbon nanotubes, the agglomeration of tube bundles, and the hydrophobicity of the main structure, their wider applications are greatly limited. Therefore, as a functional material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/00C01B31/08B82Y30/00
Inventor 夏恒恒姚建周陈李龙刘婉君
Owner SHANGHAI UNIV
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