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Electricity conductive polyaniline carbon nanotube combined electromagnetic shielding composite material and its production method

A technology of carbon nanotube composite and conductive polyaniline, which is applied in the field of electromagnetic shielding composite film and its preparation, can solve the problems of low mechanical strength and poor processability of conductive polymers, and achieve easy large-area film production and improved Effect of improving mechanical properties, processability, and thermal stability

Inactive Publication Date: 2007-08-22
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, conductive high polymers have the disadvantages of poor processability and low mechanical strength, which are limited in practical applications.

Method used

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  • Electricity conductive polyaniline carbon nanotube combined electromagnetic shielding composite material and its production method
  • Electricity conductive polyaniline carbon nanotube combined electromagnetic shielding composite material and its production method
  • Electricity conductive polyaniline carbon nanotube combined electromagnetic shielding composite material and its production method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First adopt ultrasonic method to uniformly disperse carbon nanotube 0.0022g in the chloroform extract solution 0.9g of polyaniline doped with 4-dodecylbenzenesulfonic acid with a concentration of 15wt%, and then mix the above solution with a concentration of 5.1 g of polyaniline-m-cresol solution doped with 85 wt % camphorsulfonic acid was uniformly mixed to form a film-forming solution, and finally the film-forming solution was poured on a glass slide to form a film by volatilization of chloroform.

[0027] Wherein, the mass percent concentration of carbon nanotubes (CNT wt%) is 5 wt%, the electrical conductivity is ~170 S / cm, and the phase transition temperature is 196K.

Embodiment 2

[0029] First adopt ultrasonic method to uniformly disperse carbon nanotube 0.0072g in the chloroform extract solution 0.9g of polyaniline doped with 4-dodecylbenzenesulfonic acid with a concentration of 15wt%, and then mix the above solution with a concentration of 5.1 g of polyaniline-m-cresol solution doped with 85 wt % camphorsulfonic acid was uniformly mixed to form a film-forming solution, and finally the film-forming solution was poured on a glass slide to form a film by volatilization of chloroform.

[0030] Wherein, the mass percent concentration of carbon nanotubes (CNT wt%) is 15 wt%, the electrical conductivity is ~180 S / cm, and the phase transition temperature is 215K.

Embodiment 3

[0032] First adopt ultrasonic method to uniformly disperse carbon nanotube 0.0137g in the chloroform extract solution 0.9g of polyaniline doped with 4-dodecylbenzenesulfonic acid with a concentration of 15wt%, and then mix the above solution with a concentration of 5.1 g of polyaniline-m-cresol solution doped with 85 wt % camphorsulfonic acid was uniformly mixed to form a film-forming solution, and finally the film-forming solution was poured on a glass slide to form a film by volatilization of chloroform.

[0033]Among them, the mass percentage concentration of carbon nanotubes (CNT wt%) is 25wt%, the electrical conductivity is ~210S / cm, the phase transition temperature is 219K, the mechanical strength is 14.53MPa, the elongation is 6.0243%, and the elastic modulus is 286.39MPa. (See Table 2)

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Abstract

The invention relates electromagnetic screen complex film made by electric polyaniline and carbon nano pipe and preparing method. The method comprises the following steps: dispersing the carbon nano pipe into chloroform tobacco extract mixed with 4-dodecylbenzene sulfonic acid, then mixing it with polyaniline m-cresol solution doped with camphor sulfonic acid to form filming solution, pouring the filming solution on the slide glass, getting the complex film of polyaniline and carbon nano pipe whose concentration is 5wt%-50wt% in form filming solution. The optimum electric conductivity of complex film is 212 S / cm and mechanics intensity is 14.53Mpa. When the frequency of complex film is between 106Hz and 109Hz and thickness of complex film is 20mum, the electromagnetic screen efficiency is between 35dB and 40dB. The more the electric conductivity and thickness of complex film, the higher the electromagnetic screen efficiency.

Description

technical field [0001] The invention relates to a composite material for electromagnetic shielding and antistatic and a preparation method thereof. In particular, it relates to an electromagnetic shielding composite film composed of conductive polyaniline and carbon nanotubes and a preparation method thereof. Background technique [0002] Metals, conductive plastics (including coatings), graphite carbon materials, and conductive polymers are the four major types of electromagnetic shielding and antistatic materials currently used. Metal mesh or block material, such as: Cu, Al and other materials known to those skilled in the art are traditional electromagnetic shielding materials, which have the advantages of high electromagnetic shielding coefficient (SE) and good mechanical properties. However, it has a high specific gravity, is easily corroded, has poor processability (special shape), and consumes natural resources. Graphite material is a conductive material made of hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/02C08K3/04C08J5/18
Inventor 万梅香翟锦江雷肖强凤李军朝
Owner INST OF CHEM CHINESE ACAD OF SCI
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