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Method for preparing sulfonated polyaniline grafted multi-wall carbon nanotube

A technology of multi-walled carbon nanotubes and sulfonated polyaniline, which is applied in the field of preparation of sulfonated polyaniline-grafted multi-walled carbon nanotube composite materials, can solve problems such as poor compatibility, and achieve excellent conductivity, good dispersion and Solubility effect

Inactive Publication Date: 2009-03-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the multi-walled carbon nanotubes themselves are easy to agglomerate and have poor compatibility with polymers, and the potential microscopic phase separation of the two phases of multi-walled carbon nanotubes and polymers in the composite material becomes the study of multi-walled carbon nanotubes / polyaniline composites problems that need to be solved in the application

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  • Method for preparing sulfonated polyaniline grafted multi-wall carbon nanotube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 500 mg of vacuum-dried multi-walled carbon nanotubes with carboxyl groups on the surface were ultrasonically dispersed in 200 ml of N,N-dimethylacetamide, 10 g of thionyl chloride was added, and heated to reflux at 80° C. for 24 hours. After the residual thionyl chloride was distilled off, 10 g of p-phenylenediamine was added and reacted at 120° C. for 72 hours under the protection of nitrogen. After washing, filtering and vacuum drying, the multi-walled carbon nanotubes with aniline groups on the surface are obtained.

[0025] 200 mg of multi-walled carbon nanotubes with aniline groups attached to the surface were added to 200 ml of 1 mol / L HCl solution, and ultrasonically dispersed for 0.5 hours. Add aniline monomer to the suspension containing multi-walled carbon nanotubes and aniline monomer, and ultrasonically disperse for 0.5 hours. Ammonium persulfate dissolved in 50 ml of 1 mol / L HCl solution was added dropwise to the reaction system, and the dropping time was ...

Embodiment 2

[0034] Example 2 can illustrate that if the degree of sulfonation of the sulfonated polyaniline distributed on its surface decreases, the electrical conductivity of the final sulfonated polyaniline grafted multi-walled carbon nanotube composite material will increase, while the solubility in water will decrease . The specific implementation is as follows:

[0035] 500 mg of vacuum-dried multi-walled carbon nanotubes with carboxyl groups on the surface were ultrasonically dispersed in 200 ml of N,N-dimethylacetamide, 10 g of thionyl chloride was added, and heated to reflux at 80° C. for 24 hours. After the residual thionyl chloride was distilled off, 10 g of p-phenylenediamine was added and reacted at 120° C. for 72 hours under the protection of nitrogen. Then after washing, filtering and vacuum drying, the multi-walled carbon nanotubes with aniline groups attached to the surface are obtained;

[0036] Add 200 mg of multi-walled carbon nanotubes with aniline groups on the sur...

Embodiment 3

[0040] Example 3 can illustrate that if the content of multi-walled carbon nanotubes with aniline groups on the surface decreases, the electrical conductivity of the final sulfonated polyaniline-grafted multi-walled carbon nanotubes composite material will decrease. The specific implementation is as follows:

[0041] 500 mg of vacuum-dried multi-walled carbon nanotubes with carboxyl groups on the surface were ultrasonically dispersed in 200 ml of N,N-dimethylacetamide, 10 g of thionyl chloride was added, and heated to reflux at 80° C. for 24 hours. After the residual thionyl chloride was distilled off, 10 g of p-phenylenediamine was added and reacted at 120° C. for 72 hours under the protection of nitrogen. After washing, filtering and vacuum drying, the multi-walled carbon nanotubes with aniline groups on the surface are obtained.

[0042] 200 mg of multi-walled carbon nanotubes with aniline groups attached to the surface were added to 200 ml of 1 mol / L HCl solution, and ult...

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Abstract

The invention discloses a method for preparing a sulfonated polyaniline graft multi-walled carbon nano-tube composite material. The method comprises the following steps: after a multi-walled carbon nano-tube the surface of which is provided with a carboxyl group is subjected to acyl chlorination, the multi-walled carbon nano-tube reacts with para-phenylene diamine, so that anilino group is connected to the surface of the multi-walled carbon nano-tube through amido link; the anilino group connected to the surface of the carbon nano-tube initiates polymerization after the anilino group is oxidized, and the multi-walled carbon nano-tube and sulfonated polyaniline can be connected together through the amido link by further sulfonation and hydrolysis reactions, thereby forming the composite material using the multi-walled carbon nano-tube as a core and the sulfonated polyaniline as a shell. The method solves the problems that the polyaniline can be dissolved in water but has low electrical conductivity after the polyaniline is sulfonated, and the multi-walled carbon nano-tube can be easily agglomerated, but can not be dissolved in water, which has important significance in practical application for sulfonated polyaniline, the multi-walled carbon nano-tube and the polyaniline / multi-walled carbon nano-tube composite material. The method can be widely applied to microelectronic component printing, photoelectric nano-devices, sensors and the like.

Description

technical field [0001] The invention belongs to the technical field of new chemical and chemical composite materials, and in particular relates to a preparation method of a sulfonated polyaniline grafted multi-walled carbon nanotube composite material. Background technique [0002] Polyaniline has become an important member of the conjugated conductive polymer family due to its excellent conductivity, simple synthesis, environmental stability, and the ability to control its conductivity through redox or reversible doping reactions. Sulfonated polyaniline is a water-soluble doped modified polyaniline product that replaces sulfonic acid groups on the benzene ring of polyaniline. Its aqueous solution can be cast on various substrates and has little pollution in the application stage. Takahashi et al. carried out sulfonation and hydrolysis of doped polyaniline to obtain water-soluble externally doped sulfonated polyaniline [Synth.Met.Vol.128, 27 (2002)]. Compared with the metho...

Claims

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Application Information

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IPC IPC(8): C08G83/00
Inventor 姚琲许军刘平王秀奎
Owner TIANJIN UNIV
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