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Preparation method of mercapto carbon nanometer pipe

A technology of carbon nanotubes and mercaptocarbons, which is applied in the field of surface modification of carbon nanotube materials, and can solve problems such as weak van der Waals forces

Inactive Publication Date: 2008-12-03
KUNMING INST OF PRECIOUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After carbon nanotubes are modified by these groups, their compatibility with polymer matrix materials can be greatly improved, but these modification methods are of little significance for improving the compatibility of carbon nanotubes in metal composite materials and functional materials. Large, with little effect, because these groups cannot form strong chemical bonds with metal materials, only weak van der Waals forces

Method used

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  • Preparation method of mercapto carbon nanometer pipe
  • Preparation method of mercapto carbon nanometer pipe
  • Preparation method of mercapto carbon nanometer pipe

Examples

Experimental program
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Effect test

Embodiment 1

[0010] 1) Weigh 0.5 g of multi-walled carbon nanotubes prepared by CVD, add 50 ml of 4:1 (volume ratio) mixed acid of concentrated nitric acid and concentrated sulfuric acid, heat to reflux for 1 h, cool, filter, wash, and dry. The purpose of this step is to attach carboxyl and hydroxyl groups to the surface of the carbon nanotubes.

[0011] 2) Add 0.01mol LiAlH to the carbon nanotubes treated in step 1) 4 In anhydrous ether solution, ultrasonically oscillate for 2min, react in a sealed chamber at room temperature for 1h, filter, wash with anhydrous ether several times until LiAlH is free 4 until it was dried, and then soaked in 0.1M HCl for 30 minutes to allow it to be fully hydrolyzed, and finally filtered, washed, and dried. The purpose of this step is to reduce all the carboxyl groups on the surface of the carbon nanotubes to hydroxyl groups.

[0012] 3) Add 0.02mol / l PBr to the carbon nanotubes after step 2) 3 In anhydrous acetone solution, ultrasonically oscillate for...

Embodiment 2

[0015] 1) Weigh 0.5 g of single-walled carbon nanotubes prepared by CVD, add 50 ml of 4:1 mixed acid of concentrated nitric acid and concentrated sulfuric acid (volume ratio), heat to reflux for 1 h, cool, filter, wash, and dry. The purpose of this step is to attach carboxyl and hydroxyl groups to the surface of the carbon nanotubes.

[0016] 2) Add 0.01mol LiAlH to the carbon nanotubes treated in step 1) 4 In anhydrous ether solution, ultrasonically oscillate for 2min, react in a sealed chamber at room temperature for 1h, filter, wash with anhydrous ether several times until LiAlH is free 4 until it was dried, and then soaked in 0.1M HCl for 30 minutes to allow it to be fully hydrolyzed, and finally filtered, washed, and dried. The purpose of this step is to reduce all the carboxyl groups on the surface of the carbon nanotubes to hydroxyl groups.

[0017] 3) Add the carbon nanotubes treated in step 2) into a chloroform solution of 0.02 mol / l thionyl chloride, ultrasonically...

Embodiment 3

[0020] 1) Weigh 0.5 g of multi-walled carbon nanotubes prepared by CVD, add 50 ml of 4:1 mixed acid of concentrated nitric acid and concentrated sulfuric acid (volume ratio), heat to reflux for 1 h, cool, filter, wash, and dry. The purpose of this step is to attach carboxyl and hydroxyl groups to the surface of the carbon nanotubes.

[0021] 2) Add 0.01mol LiAlH to the carbon nanotubes treated in step 1) 4 In anhydrous ether solution, ultrasonically oscillate for 2min, react in a sealed chamber at room temperature for 1h, filter, wash with anhydrous ether several times until LiAlH is free 4 until it was dried, and then soaked in 0.1M HCl for 30 minutes to allow it to be fully hydrolyzed, and finally filtered, washed, and dried. The purpose of this step is to reduce all the carboxyl groups on the surface of the carbon nanotubes to hydroxyl groups.

[0022] 3) Add 0.02mol / l ZnCl to the carbon nanotubes treated in step 2) 2 In concentrated hydrochloric acid, ultrasonically osc...

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Abstract

The present invention is the preparation process of mercapto carbon nanotube, relates to material physics and chemistry, and solves the technological problem of compatibility and binding force between carbon nanotube and metal material. The main technological path includes the successive steps of: treating carbon nanotube with mixed acid of concentrated nitric acid and concentrated sulfuric acid for grafting carboxyl group and hydroxyl group, reducing the grafted carboxyl group into hydroxyl group with LiAlH4, reacting with halogen containing reagent to convert the hydroxyl group on carbon nanotube into halogeno radical, and final reacting the carbon nanotube with halogeno radical and hydrosulfide to obtain the mercapto radical modified carbon nanotube. The mercapto radical modified carbon nanotube is used mainly for preparing composite metal material and functional material.

Description

technical field [0001] The invention relates to surface modification of carbon nanotube materials, belonging to the field of material physics and chemistry. Background technique [0002] Since carbon nanotubes (CNTs) were discovered by Japanese scholar Iijima in 1991 (Iijima S. Helical, Nature 354 (6348), 1991, P56-58), due to their unique structural characteristics, they have shown excellent mechanical, electrical and magnetic properties. The performance makes it have potential and huge application value in many fields. In the field of materials, because carbon nanotubes have high Young's modulus, tensile strength and ultra-high toughness, and have excellent physical and chemical properties such as strong acid and alkali resistance, and are not easy to oxidize, they are very promising in the preparation of high-performance composite materials. It is widely used in processing and processing, but the surface amphiphobic and chemical inertness of carbon nanotubes seriously af...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82B3/00C01B32/168
Inventor 冯永成董守安
Owner KUNMING INST OF PRECIOUS METALS
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