Preparation method of organic composite film and method for improving its thermoelectric performance

A technology of composite material film and composite material film, which is applied in the field of preparation of organic composite material film, can solve problems such as poor thermoelectric performance, achieve the effects of reducing carrier concentration, simple preparation process conditions, and increasing Seebeck coefficient

Active Publication Date: 2021-05-28
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the thermoelectric properties of existing organic composite membranes are generally poor.

Method used

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  • Preparation method of organic composite film and method for improving its thermoelectric performance
  • Preparation method of organic composite film and method for improving its thermoelectric performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Prepare carbon nanotube (CNT) and polyaniline (PANI) composite material powder by in-situ oxidative polymerization method, add it to 0.1mol / L ammonia water and stir to remove doping, filter, wash with water and vacuum dry at 60°C After obtaining carbon nanotubes and intrinsic polyaniline powder, take an appropriate amount of carbon nanotubes and intrinsic polyaniline powder, and add camphorsulfonic acid according to the ratio of polyaniline and camphorsulfonic acid molar ratio of 2:1 for secondary Doped, dispersed in m-cresol solvent and stirred to obtain a dispersed solution. The dispersion solution is drip-coated on a glass substrate, and dried at 40°C to prepare an organic composite film, wherein the carbon nanotube content is 70wt%, and a part of the organic composite film is taken for UV-visible light absorption analysis, and the results are as follows figure 2 Line 1 in the

[0024] Soak the film in 0.001mol / L ammonia solution at room temperature for ...

Embodiment 2

[0025] Embodiment 2: Same as Embodiment 1, the difference is that an organic composite film doped with camphorsulfonic acid is prepared. Soak the film in 0.01 mol / L ammonia solution at room temperature for 1 min, then rinse with water three times to neutral and dry. Eventually its conductivity decreased to 2405S cm -1 , Seebeck coefficient increased to 33μVK -1 , power factor increased to 262μWm -1 K -2 .

Embodiment 3

[0026] Embodiment 3: with embodiment 1, its difference is, prepare the organic composite film of camphorsulfonic acid doping, organic composite film is placed in the ammonia solution of 1mol / L at room temperature and soak 1min, clear water rinses three times to Neutral and tumble dry. Eventually its conductivity decreased to 2068S cm -1 , Seebeck coefficient increased to 41μV K -1 , power factor increased to 348μWm - 1 K -2 , see Table 1 for details. Simultaneously, the organic composite material film after alkali treatment is carried out ultraviolet-visible light absorption analysis, and its result is as follows figure 2 Line 2 in the figure, as can be seen from the figure, the absorption peak of the blend film prepared by the present invention is more obvious at 750 nanometers (local π-polaron transition between PANI molecular chains), and the blue shift, while 440 The absorption peak at the nanometer (PANI molecular chain polaron-π * Transformation) intensity become...

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Abstract

The invention discloses a method for preparing an organic composite film and a method for improving its thermoelectric performance. The preparation method comprises: mixing and stirring aniline and nano-carbon materials, in-situ chemical oxidation polymerization and secondary doping with camphorsulfonic acid Prepare a composite film of nano-carbon material and polyaniline, the composite film of the nano-carbon material and polyaniline is an organic composite film; the method for improving its thermoelectric performance is: soaking the above-mentioned organic composite film in an alkaline solution to remove Doped, then taken out, washed with clean water until neutral and dried. The preparation process has simple conditions, low cost, high controllability and excellent stability, and is suitable for large-scale industrial production of organic composite thermoelectric materials.

Description

technical field [0001] The invention belongs to the field of organic thermoelectric materials, and relates to a method for preparing an organic composite film and a method for improving its thermoelectric performance. Background technique [0002] In recent years, environmental pollution and energy crisis have become increasingly serious. Research and development of clean energy and energy conversion technology has become a global energy development trend. Thermoelectric conversion technology uses the Seebeck effect of semiconductor materials to recycle a large amount of waste heat energy in life and industry and directly convert it into electrical energy for reuse, effectively alleviating the problem of fossil energy consumption. At the same time, thermoelectric devices have no pollution to the environment, no mechanical moving parts, and reliable performance. They are widely used in aerospace, petrochemical, microelectronic devices, and wearable electronic devices. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/02C08K3/04C08K5/42C08J5/18C08G73/02
Inventor 李鹏程梁原李慧刘治田高翔彭祥
Owner WUHAN INSTITUTE OF TECHNOLOGY
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