Method for preparing conductive polymer/carbon nanotube composite fiber thermoelectric material

A carbon nanotube composite and conductive polymer technology, applied in the direction of thermoelectric device node lead-out wire materials, etc., can solve the problems of fiber breakage, difficulty of continuous fiber materials, and inability to prepare continuous fibers, etc., to achieve compact structure, improve thermoelectric performance, The effect of low production cost

Active Publication Date: 2012-07-18
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, excessively high roller speeds tend to cause fiber breakage, making it impossible to prepare continuous fibers.
Therefore, it is difficult to prepare a large number of continuous fiber materials that are oriented at the molecular scale by electrospinning technology.

Method used

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  • Method for preparing conductive polymer/carbon nanotube composite fiber thermoelectric material
  • Method for preparing conductive polymer/carbon nanotube composite fiber thermoelectric material
  • Method for preparing conductive polymer/carbon nanotube composite fiber thermoelectric material

Examples

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preparation example Construction

[0033] Preparation of spinning solution

[0034] Using commercial conductive polymer monomer solution, carbon nanotubes, polymerization agent, etc. as raw materials, according to the set ratio of polymer and carbon nanotubes, each reactant is weighed, and the polymer is prepared by in-situ doping and polymerization methods. / carbon nanotube mixed solution. Adjust the polymerization conditions to obtain conductive polymers with appropriate molecular weights. Adjust the polymer doping state and improve the solubility of the polymer. Select appropriate organic solvent to prepare spinning solution with appropriate concentration.

[0035] Preparation of spun film

[0036] The prepared conductive polymer / carbon nanotube spinning solution is added into a syringe with an appropriate needle diameter, the jet flow rate of the spinning solution is adjusted, and a certain high electric field intensity is applied to induce electrospinning. Use the roller with aluminum foil as the rece...

Embodiment 1

[0045] Preparation of polyaniline / carbon nanotube (wt40%) composite spinning solution: using commercial aniline solution, ammonium persulfate, hydrochloric acid, etc. as raw materials, first prepare 50ml, 1M hydrochloric acid, add 2.5ml aniline monomer solution and 1.67g carbon nano Tube, ultrasonically dispersed for 20 minutes. Prepare 5g of ammonium persulfate and 20ml of 1M hydrochloric acid solution, slowly add to the above reactants, and react in an ice bath for 6 hours to prepare a doped polyaniline / carbon nanotube composite solution. The filter cake was obtained by vacuum filtration, followed by vacuum drying at 60° C. for 48 hours. Then, the prepared powder is added into ammonia water for dedoping. After vacuum drying at 60 degrees for 48 hours, 912 mg of polyaniline / carbon nanotube composite in intrinsic state and 1140 mg of camphorsulfonic acid were added to 90 ml of dichloromethane or trichloromethane solution, and 12 mg of polyethylene oxide was added simultaneous...

Embodiment 2

[0049] Preparation of polyaniline / carbon nanotube (wt15%) composite fiber thermoelectric material: In this embodiment, the carbon nanotubes added in the preparation process of polyaniline spinning solution is 15% by weight. The preparation process of the spinning membrane is as follows: the prepared spinning solution is added to a syringe with a needle diameter of about 0.5mm, the injection flow rate of the spinning solution is adjusted to 2ml / h, and a high electric field of 10KV is applied to induce electrospinning. The spun film was deposited on a roller glued with aluminum foil as a receiving electrode, and the rotation speed of the roller was 1300 rpm. The preparation process parameters and process steps of the fiber blocks are the same as those in Example 1.

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Abstract

The invention provides a method for preparing a conductive polymer / carbon nanotube composite fiber thermoelectric material. The method comprises the following technical processes of: doping conductive polymer monomers with carbon nanotubes, and adsorbing and polymerizing along the surfaces of the carbon tubes; promoting adsorption growth of the polymer by taking the surfaces of the carbon tubes as templates; and depositing the polymer / carbon nanotube composite fiber thermoelectric material of which molecular chains are in orientation arrangement by employing an electrospinning method. By the method, the orientation arrangement of carbon nanotube composite fibers is induced by the electrospinning method by means of inherent anisotropy of magnetoelectric dipole moment of the carbon nanotubes so as to deposit the polymer / carbon nanotube composite fibers of which the molecular chains are in orientation arrangement. The method is simple in conditions, high in controllability, low in production cost and suitable for batch production of the conductive polymer / carbon nanotube composite fiber thermoelectric material.

Description

technical field [0001] The invention relates to an electrospinning preparation technology of a conductive polymer / carbon nanotube fiber composite thermoelectric material with an ordered molecular level structure. Background technique [0002] Thermoelectric conversion technology is a technology that uses the Seebeck effect and Peltier effect of semiconductor materials to directly convert energy. The conversion efficiency mainly depends on the dimensionless performance index of the material, that is, the ZT value (Z=α 2 σ / κ, where α is the Seebeck coefficient; σ is the electrical conductivity; κ is the thermal conductivity). The biggest constraint factor affecting the application of thermoelectric conversion materials is their low thermoelectric conversion efficiency. However, with the continuous expansion and improvement of modern technology application fields, the advantages of various types of thermoelectric devices that are becoming more and more mature have attracted ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/24
Inventor 王群姚琴陈立东常江
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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