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Method for preparing functional carbon nano-tube and application thereof

A technology of carbon nanotubes and functionalization, applied in the field of materials, to achieve the effect of wide application prospects and high reactivity

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 reaction of adding double bonds to carbon nanotubes through the reaction of anhydrides and hydroxyl groups has not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 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. The above acidified and washed product was placed in H 2 SO 4 and 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.

[0018] 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 of dimethylformamide, stirred and refluxed at 70°C for 24h. Filter and wash with THF until neu...

Embodiment 2

[0021] The first step and the second step are the same as in Example 1. In the third step, 200 mg of hydroxyl carbon nanotubes are added to 6 g of maleic anhydride in butanone solution, vigorously stirred, and 0.12 g of p-toluenesulfonic acid is added. The reaction was carried out for 24 hours, washed with a nylon membrane until neutral, and functionalized carbon nanotubes with polymerizable double bonds were obtained.

Embodiment 3

[0023] The first and second steps are the same as in Example 1. In the third step, add 400 mg of hydroxyl carbon nanotubes to 10 g of maleic anhydride in toluene solution, stir vigorously, add 0.2 g of boric acid, and react at 80 ° C for 24 h. The functionalized carbon nanotubes with polymerizable double bonds were obtained by washing with a nylon membrane until neutral.

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PUM

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Abstract

The present invention provides a functionalized carbon nano-tube with polymerizable double bond and the related preparation method. Concentrated sulfuric acid and concentrated nitric acid are used for the first-step acidification treatment of the carbon nano-tube; then concentrated sulfuric acid and hydrogen peroxide are used for the second-step acidification treatment; afterward, the acidified carbon nano-tube reacts with dichloride sulfoxide and the product will then react with diol to produce a modified carbon nano-tube with hydroxyl; finally, the carbon nano-tube with polymerizable double bond is obtained after the reaction between hydroxy and maleic anhydride. The carbon nano-tube with polymerizable double bond can react further with other substances containing double bonds, therefore, the carbon nano-tube can be used as an important intermediate; other substances will be connected on the external surface of the carbon nano-tube through chemical reactions to realize the functionalized design and application of the carbon nano-tube.

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 Lijima discovered carbon nanotubes in 1991, carbon nanotubes have been a research hotspot in recent years because of their unique structure, good electrical properties and mechanical properties. Carbon nanotubes have nanoscale diameters and micron-scale lengths, and the aspect ratio can reach 100-1000. They are extremely strong and have ideal elastic modulus. They are an excellent fiber material, and their performance is better than any current fiber. Therefore, it can be used as a superfiber for the reinforcement of advanced composite materials; because carbon nanotubes combine the semi-metallic properties of graphite with the quantum laws of energy levels and electronic waves, and have nanoscale dimensions, making them in the field of electronics The a...

Claims

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Application Information

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IPC IPC(8): C01B31/02C09C1/44C09C3/08
Inventor 王国建屈泽华郭建龙刘琳李岩
Owner TONGJI UNIV
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