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Method for preparing functional carbon nano-tube and application thereof

A technology of carbon nanotubes and nanotubes, which is applied in the treatment of dyed polymer organic compounds, fibrous fillers, etc., to achieve the effects of improving performance, improving compatibility, and improving dispersibility

Inactive Publication Date: 2008-01-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the functionalized carbon nanotubes prepared by reacting polymers with maleic anhydride segments with carbon nanotubes have not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1: mix 500mg multi-walled carbon nanotubes with 150ml H 2 SO 4 with HNO 3 mixed solution (98%H 2 SO 4 : 68% HNO 3 = 3:1) mixed, and reflux reaction for 4 hours at 35-40° C. and ultrasonic vibration. Then filter with a metafluoride membrane with a pore size of 0.45 μm, and wash with water until the pH is neutral. The product was placed in a vacuum oven and dried under vacuum at 40°C for 24h. Place the product after the above acidification and washing in H 2 SO 4 with H 2 o 2 mixed solution (98%H 2 SO 4 : 30%H 2 o 2 =4:1) at 70°C for 2h. Then filter with a metafluoride membrane with a pore size of 0.45 μm, and wash with water until the pH is neutral. The product was placed in a vacuum oven and dried under vacuum at 40°C for 24h.

[0020] Step 2: Take 400 mg of the above-mentioned acidified carbon nanotubes and place them in a reaction flask, add 20 ml of SOCl 2 And 1ml dimethyl sulfoxide, stirred and refluxed at 70°C for 24h. Filter and wash with TH...

Embodiment 2

[0023] The first step and the second step are the same as in Example 1. In the third step, 1g of hydroxycarbon tubes are added to the xylene solution of 2.5g of styrene-acrylonitrile-maleic anhydride terpolymer (SAM), and Add 0.3381g of p-toluenesulfonic acid, add 2ml of dimethyl sulfoxide, disperse by ultrasonic wave for 1 minute, then place it under reflux at 120°C for 24 hours, then wash off the solvent with a metafluoride membrane to obtain a black powder, and then wash it several times with acetone , until the filtrate was precipitated with toluene without polymer, and SAM-modified carbon nanotubes were obtained.

Embodiment 3

[0025] The operation of the first step and the second step is the same as in Example 1. In the third step, 1g of hydroxy carbon tubes are added to the xylene solution of 10g of methyl methacrylate-maleic anhydride (MAM) copolymer, and the p- Phosphoric acid 0.2g, then add 2ml dimethyl sulfoxide, ultrasonic dispersion for 1min, and then reflux at 120°C for 24 hours, then wash off the solvent with a fluoride membrane to obtain a black powder, and then wash with acetone several times until the filtrate is used Toluene did not precipitate polymers, and MAM-modified carbon nanotubes were obtained.

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PUM

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Abstract

The invention provides carbon nano tubes modified by polymers with maleic anhydride chain segments and a preparation method of the carbon nano tubes. The carbon nano tubes are processed in one-step acidification treatment with concentrated sulfuric acid and concentrated nitric acid, and then have reaction with thionyl chloride after being processed in two-step acidification treatment with concentrated sulfuric acid and hydrogen peroxide. The product obtained from the above process has reaction with dihydric alcohol to obtain the modified carbon nano tubes with hydroxyl. Then the carbon nano tubes modified by polymers with maleic anhydride chain segments are obtained by means of the polymerization reaction between the hydroxyl and the polymers with maleic anhydride chain segments. Thereby, the carbon nano tubes can disperse into the composite materials well, the compatibility of the carbon nano tubes with the other materials are improved, so that the carbon nano tubes can take the advantages maximally and realize the functional design and application.

Description

technical field [0001] The invention belongs to the field of materials and relates to carbon nanotubes, in particular to a method for chemically modifying the surface of carbon nanotubes. Background technique [0002] Since Iijima discovered carbon nanotubes in 1991, carbon nanotubes have become a research hotspot in recent years because of their unique structure, good electrical properties and mechanical properties. Carbon nanotubes have a nanoscale diameter, a micron-scale length, an aspect ratio of 100-1000, extremely high strength, and an ideal elastic modulus. It is an excellent fiber material, and its performance is better than any current fiber. Therefore, it can be used as a reinforcement for advanced composite materials as a superfiber; because carbon nanotubes combine the semi-metallic properties of graphite with the quantum laws of energy levels and electronic waves, and have a nanoscale scale, it is important in the field of electronics. The application prospect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C01B31/02C09C1/44C09C3/10
Inventor 王国建屈泽华李岩石全郭建龙
Owner TONGJI UNIV
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