PH-regulated p-type and n-type conversion thermoelectric material and preparation method
A kind of thermoelectric material and n-type technology, which is applied in the direction of thermoelectric device junction lead-out material, thermoelectric device manufacturing/processing, etc., can solve the problem of low electrical conductivity, etc., to improve electrical conductivity, improve film formation, and improve dispersibility Effect
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Embodiment 1
[0032] (1) Dissolve 15 mg of sodium dodecylbenzenesulfonate in 30 mL of water to obtain mixed solution A;
[0033] (2) Add 5 mg of single-walled carbon nanotubes to the mixture A to obtain the mixture B;
[0034] (3) Magnetically stir the mixture B at room temperature for 5 min, and continue to sonicate for 10 min;
[0035] (4) Add 1 g of polyethyleneimine (M.W.600) to the mixed solution B in step (3), and continue to sonicate for 30 min to obtain the mixed solution C;
[0036] (5) Adjust the mixed solution C to pH = 3 with tris / HCl buffer regulator to obtain the mixed solution D;
[0037] (6) The mixture D was magnetically stirred at room temperature for 24 hours to obtain the mixture;
[0038] (7) Wash the mixture three times with water, three times with ethanol, and filter under reduced pressure to obtain a black filter membrane;
[0039] (8) The black filter membrane was dried in a vacuum oven at 80 °C for 4 h to obtain a polyethyleneimine / carbon nanotube composite ther...
Embodiment 2
[0041] (1) Dissolve 10 mg of sodium dodecylbenzenesulfonate in 30 mL of water to obtain mixed solution A;
[0042] (2) Add 5 mg of single-walled carbon nanotubes to the mixture A to obtain the mixture B;
[0043] (3) Magnetically stir the mixture B at room temperature for 5 min, and continue to sonicate for 10 min;
[0044] (4) Add 0.5 g of polyethyleneimine (M.W.600) to the mixed solution B in step (3), and continue to sonicate for 30 min to obtain the mixed solution C;
[0045] (5) Adjust the mixed solution in step (4) to pH=7 with tris / HCl buffer regulator to obtain mixture D;
[0046] (6) The mixture D was magnetically stirred at room temperature for 48 h to obtain the mixture;
[0047] (7) Wash the mixture three times with water, three times with ethanol, and filter under reduced pressure to obtain a black filter membrane;
[0048] (8) The black filter membrane was dried in a vacuum oven at 60 °C for 6 h to obtain a polyethyleneimine / carbon nanotube composite thermoele...
Embodiment 3
[0050] (1) Dissolve 8 mg of sodium dodecylbenzenesulfonate in 30 mL of water to obtain mixed solution A;
[0051] (2) Add 5 mg of single-walled carbon nanotubes to the mixture A to obtain the mixture B;
[0052] (3) Magnetically stir the mixture B at room temperature for 5 min, and continue to sonicate for 10 min;
[0053](4) Add 0.5 g of polyethyleneimine (M.W.600) to the mixed solution B in step (3), and continue to sonicate for 30 min to obtain the mixed solution C;
[0054] (5) Adjust the mixed solution C to pH = 9 with tris / HCl buffer regulator to obtain the mixed solution D;
[0055] (6) The mixture D was magnetically stirred at room temperature for 48 h to obtain the mixture;
[0056] (7) Wash the mixture three times with water, three times with ethanol, and filter under reduced pressure to obtain a black filter membrane;
[0057] (8) The black filter membrane was dried in a vacuum oven at 45 °C for 12 h to obtain a polyethyleneimine / carbon nanotube composite thermoe...
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