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Low-voltage microwave radiation carbon nanotube hydroxyl modification method

A carbon nanotube and microwave radiation technology, which is applied in the field of carbon nanotube hydroxyl modification, can solve the problems of long reaction time, complicated process, high cost, etc., and achieve the effects of uniform reaction, increased hydrophilicity, and enhanced dispersibility

Inactive Publication Date: 2008-11-05
HARBIN INST OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of complex process, long reaction time, large energy consumption and high cost in the modification of carbon nanotubes in the prior art, and to provide a method for modifying the hydroxyl group of carbon nanotubes by low-pressure microwave radiation

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  • Low-voltage microwave radiation carbon nanotube hydroxyl modification method

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specific Embodiment approach 1

[0007] Embodiment 1: In this embodiment, a method for modifying hydroxyl groups of carbon nanotubes irradiated by low-pressure microwaves is realized according to the following steps: 1. Submerge 0.5 to 2 g of carbon nanotubes in 50 mL of alkali solution, React for 1-10min under the condition of 0.2-0.5MPa, take it out and cool to room temperature, add distilled water and let it stand for precipitation; 2. Wash the precipitate with polytetrafluoroethylene film until the pH of the dripping filtrate is 6-7, and then in 80 drying at ~105°C to obtain hydroxyl-modified carbon nanotubes; wherein the concentration of the alkali solution in step 1 is 1.5-15mol / L.

[0008] In this embodiment, the carbon nanotubes are multi-walled carbon nanotubes.

specific Embodiment approach 2

[0009] Embodiment 2: This embodiment differs from Embodiment 1 in that in step 1, 0.8-1.4 g of carbon nanotubes are immersed in 50 mL of alkaline solution. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0010] Embodiment 3: This embodiment differs from Embodiment 1 in that in step 1, 1 g of carbon nanotubes is immersed in 50 mL of alkali solution. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention provides a hydroxy modification method for a low-pressure microwave radiation carbon nanometer tube, it relates to the hydroxy modification method of the carbon nanometer tube and solves the problems of the existing modification technology on nanometer tube that the technical process is complex, the reaction time is long, and the energy consumption and the cost are high. The modification method includes the steps of: 1. soaking carbon nanometer tube into alkali solution, then heat by microwave under low pressure, and remove the upper layer of alkali solution after the cooling and precipitation to obtain the precipitate; 2. cleaning and dry the precipitate to obtain the hydroxy-modified carbon nanometer tube. The invention greatly shortens the reaction time and has the advantages of simple technique, low energy consumption and low cost.

Description

technical field [0001] The invention relates to a method for modifying a carbon nanotube hydroxyl group. Background technique [0002] Japanese electron microscopy expert Iijima first discovered carbon nanotubes in 1991. Due to their strong mechanical properties, high tensile strength, and good flexibility, carbon nanotubes are widely used in many composite materials such as electronics, metals, plastics, fibers, and ceramics. ; Carbon nanotubes have become the best hydrogen storage materials so far, and can also be used as an excellent carrier for many types of reaction catalysts. However, due to the poor hydrophilicity of carbon nanotubes, modification of carbon nanotubes is an essential part if the performance of carbon nanotubes is to be maximized. Although there are many methods for modifying carbon nanotubes at present, the more successful one is "A Preparation Method for Hydroxyl Modification on the Surface of Carbon Nanotubes" (Chinese application number: 2006100252...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 王鹏史书杰曹海雷
Owner HARBIN INST OF TECH
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