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Process of preparing chitosan/carbon nano tube composite material by covalence graft

A technology of carbon nanotubes and composite materials, which is applied in the field of covalent grafting to prepare chitosan/carbon nanotube composite materials, can solve the problems of weak bonding force, poor solubility and dispersibility of composite materials, and achieve the combination of The effect of firm force, stable solution dispersion and good application prospect

Inactive Publication Date: 2006-11-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods more or less have the disadvantages of weak bonding force, poor solubility and dispersibility of the prepared composite materials, which limit their application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Acidification of carbon nanotubes: adding 2.0 grams of multi-walled carbon nanotubes to 60 milliliters of mass concentration of 95% sulfuric acid and 20 milliliters of mass concentration of nitric acid mixed solution of 60%, after ultrasonic treatment for 20 minutes, then It was heated to reflux state for 2 hours, and after cooling to room temperature, the acid solution was removed by suction filtration, and the solid was washed several times with deionized water until the pH of the aqueous phase was 6, and then the solid was vacuum-dried at 60°C for 12 hours to obtain Acidified multi-walled carbon nanotubes 1.2 g.

[0018] (2) Acyl chlorination of carbon nanotubes: 1.2 grams of acidified multi-walled carbon nanotubes were mixed with 40 milliliters of thionyl chloride, treated with ultrasonic waves for 20 minutes, then heated to 65° C. for 24 hours, cooled to After room temperature, the thionyl chloride was removed by centrifugation, the solid was washed three times...

Embodiment 2

[0021] (1) Acidification of carbon nanotubes: adding 2.0 grams of multi-walled carbon nanotubes to 60 milliliters of mass concentration of 95% sulfuric acid and 20 milliliters of mass concentration of nitric acid mixed solution of 60%, after ultrasonic treatment for 20 minutes, then It was heated to reflux state for 2 hours, and after cooling to room temperature, the acid solution was removed by suction filtration, and the solid was washed several times with deionized water until the pH of the aqueous phase was 6, and then the solid was vacuum-dried at 60°C for 12 hours to obtain Acidified multi-walled carbon nanotubes 1.2 g.

[0022] (2) Acyl chlorination of carbon nanotubes: 1.2 grams of acidified multi-walled carbon nanotubes were mixed with 40 milliliters of thionyl chloride, treated with ultrasonic waves for 20 minutes, then heated to 65° C. for 24 hours, cooled to After room temperature, the thionyl chloride was removed by centrifugation, the solid was washed three times...

Embodiment 3

[0025] (1) Acidification of carbon nanotubes: adding 2.0 grams of multi-walled carbon nanotubes to 60 milliliters of mass concentration of 95% sulfuric acid and 20 milliliters of mass concentration of nitric acid mixed solution of 60%, after ultrasonic treatment for 20 minutes, then It was heated to reflux state for 2 hours, and after cooling to room temperature, the acid solution was removed by suction filtration, and the solid was washed several times with deionized water until the pH of the aqueous phase was 6, and then the solid was vacuum-dried at 60°C for 12 hours to obtain Acidified multi-walled carbon nanotubes 1.2 g.

[0026] (2) Acyl chlorination of carbon nanotubes: 1.2 grams of acidified multi-walled carbon nanotubes were mixed with 40 milliliters of thionyl chloride, treated with ultrasonic waves for 20 minutes, then heated to 65° C. for 24 hours, cooled to After room temperature, the thionyl chloride was removed by centrifugation, the solid was washed three times...

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Abstract

A process for preparing the chitosan-carbon nanotube composition by covalent graft includes such steps as acidifying carbon nanotubes by strong-oxidizing acid to make its surface to carry carboxy radicals, converting them to acylchlorinated carbon nanotubes by sulfoxide chloride, and reaction between said carbon nanotubes and the chitosan in N,N-dimethylformamide and / or N,N-dimethylacetoamino pyridine at 120-140 deg.C.

Description

technical field [0001] The invention relates to a method for preparing a chitosan / carbon nanotube composite material through covalent grafting, which belongs to the composite preparation technology of biomaterials and photoelectric materials. Background technique [0002] Carbon nanotubes are coaxial hollow tubular nanoscale materials formed by gathering together a large number of carbon atoms under certain conditions. Its radial dimension is on the order of nanometers, and its axial dimension is on the order of micrometers. A new member of , is an ideal one-dimensional quantum material. Carbon nanotubes have excellent properties in mechanics, electricity, optics, etc., and can be applied to many fields such as hydrogen storage materials, battery materials, sensor materials, and catalyst materials. However, due to the extremely poor solubility of carbon nanotubes, its application has been restricted. Since 1994 Green [30] found that carbon nanotubes containing active grou...

Claims

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Application Information

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IPC IPC(8): C08B37/08C08K3/04C08K9/00C08L5/08
Inventor 封伟吴子刚
Owner TIANJIN UNIV
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