Method for preparing composite thermoelectric material of PPY cladding carbon nano tube
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A carbon nanotube and pyrrole technology is applied in the field of in-situ oxidative polymerization to coat carbon nanotubes to form composite thermoelectric materials. Responsive effect
Inactive Publication Date: 2014-06-04
INST OF CHEM CHINESE ACAD OF SCI
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[0007] However, as one of the very stable conductive polymers, polypyrrole, although the thermoelectric properties of its pure polymers have attracted attention as early as the 1990s [R. Roy, et al., J. Phys.: Condens. Matter, 3, 7849 (1991)], but the thermoelectric performance of its composite system with inorganic particles has not yet been reported
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Embodiment 1
[0033] (1) Add single-walled carbon nanotubes (13.40 g) to 20 mL deionized water to obtain a black suspension;
[0034] (2) Dissolve the surfactant PSSNa (67.00 mg) in 4 mL deionized water and stir to dissolve;
[0035] (3) Dissolve the dopant 1,5-naphthalene disulfonic acid (360.00 mg, 1.00 mmol) in 4 mL deionized water and stir to dissolve;
[0036] (4) Dissolve the oxidant ammonium persulfate (510.00 mg, 2.40 mmol) in 4 mL of deionized water and stir to dissolve;
[0037] (5) adding the solution obtained in step (2) to the suspension in step (1), and ultrasonically dispersing for 30 min to obtain a carbon nanotube dispersion;
[0038] (6) With stirring at room temperature, add pyrrole monomer (134.00 mg, 2.00 mmol) dropwise to the dispersion obtained in step (5), and continue stirring for 30 min; then add the solution obtained in step (3), and continue stirring for 30 min , and cool it down to 0~5 o C;
[0039] (7) Slowly add the solution obtained in step (4) to the dis...
Embodiment 2
[0042] According to the method and steps described in Example 1, only the surfactant PSSNa (35.50 mg) in step (2) was dissolved in 4 mL deionized water; the dopant 1,5-naphthalene di Sulfonic acid (180.00 mg, 0.50 mmol) was dissolved in 4 mL of water; the oxidant ammonium persulfate (270.00 g, 1.20 mmol) in step (4) was dissolved in 4 mL of deionized water; The solid (67.00 mg, 1 mmol) was added dropwise to the dispersion obtained in step (5). Finally, the electrical conductivity of the carbon nanotube composite powder coated with polypyrrole was 11.36 S cm -1 , Seebeck coefficient is 15.01 μV / K.
Embodiment 3
[0044] According to the method and steps described in Example 1, only the surfactant PSSNa (22.34 mg) in step (2) was dissolved in 4 mL deionized water; the dopant 1,5-naphthalene di Sulfonic acid (118.80 mg, 0.33 mmol) was dissolved in 4 mL of water; the oxidant ammonium persulfate (156.88 mg, 0.74 mmol) in step (4) was dissolved in 4 mL of deionized water; The solid (44.67 mg, 0.65 mmol) was added dropwise to the dispersion obtained in step (5). Finally, the electrical conductivity of the carbon nanotube composite powder coated with polypyrrole was 2.79 S cm -1 , the Seebeck coefficient is 19.52 μV / K.
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Abstract
The invention relates to a method for preparing a composite thermoelectric material of a PPY cladding carbon nano tube, in particular to a method according to which when ammonium persulfate serves as an oxidizing agent, pyrrole is used for carrying out cladding on the carbon nano tube through in-situ oxidative polymerization to form the composite thermoelectric material. According to the method for preparing the composite thermoelectric material, pyrrole monomers which are low in cost and easy to obtain and the carbon nano tube which is stable in property are used as raw materials, PSSNa serves as a surface activating agent, 1,5-naphthalene disulfonic acid serves as a doping agent, the ammonium persulfate serves as the oxidizing agent and water serves as a solvent, the composite thermoelectric material of the carbon nano tube and the PPY is synthesized with high efficiency by means of in-situ oxidative polymerization of the pyrrole under the room temperature. According to the method for preparing the composite thermoelectric material of the PPY cladding carbon nano tube, the defects of the low intrinsic conductivity of the pure-electricity-conducting macromolecule PPY, the high heat conducting rate of the carbon nano tube and the like are overcome, the features of the low heat conducting rate of the PPY and the high conductivity of the carbon nano tube are made full use of, the PPY and the carbon nano tube are organically combined, and therefore the method for preparing the high-thermoelectric-property composite material of the PPY cladding carbon nano tube is easy to operate, green, environmentally friendly, low in reaction temperature and good in dispersion uniformity of components.
Description
technical field [0001] The invention relates to a method for preparing a composite thermoelectric material of polypyrrole-coated carbon nanotubes, in particular to a method for coating carbon nanotubes with pyrrole through in-situ oxidation polymerization to form a composite thermoelectric material under the condition that ammonium persulfate is used as an oxidant. Background technique [0002] With the acceleration of global industrialization, solving environmental pollution and world energy shortage and depletion has become a worldwide problem. Therefore, the development and use of new green energy has become very urgent. However, in production and life, there are many unavoidable generated but discarded heat energies, such as geothermal heat, frictional heat, vehicle exhaust, gas emitted by factory boilers, etc. If these waste heat can be effectively recycled, it will be Become an effective means to alleviate the energy crisis. Thermoelectric materials are functional mat...
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