Modified carbon nano tube and preparation method thereof
A technology of carbon nanotubes and nanotubes, applied in the field of modified carbon nanotubes and its preparation, can solve the problems of destroying the structure of carbon nanotubes, lowering the thermal decomposition temperature, and having no active groups in modified carbon nanotubes, and achieving high electrical conductivity rate, reducing the effect of silanol content
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Embodiment 1
[0037] 1. Preparation of hyperbranched polyaniline
[0038] 0.9g aniline, 1.1g o-toluidine and 1.7g m-aminobenzenesulfonic acid were mixed respectively, and 150mL hydrochloric acid solution (0.2mol / L) was added in the mixture; 2 Under protection and at 0-5°C, mechanically stir for 30 minutes. Subsequently, 100 mL of ammonium persulfate (0.3 mol / L) solution was added dropwise and vigorously stirred. After the dropwise addition, keep warm for 5 hours until the reaction is over, wash with dilute hydrochloric acid solution, acetone, deionized water, filter with suction, and vacuum dry at 50°C for 24 hours to obtain polyaniline with an intrinsic viscosity of 0.43dL / g. Its infrared spectrum, ultraviolet-visible spectrum, 1 H nuclear magnetic resonance spectrum, scanning electron microscope, X-ray diffraction spectrum, conductivity curve and thermogravimetric curve are respectively as attached figure 1 , 2 , 3, 4, 5, 6 and 7.
Embodiment 2
[0057] 1. Preparation of hyperbranched polyaniline
[0058] Prepare hyperbranched polyaniline according to embodiment 1 technical scheme.
[0059] 2. Preparation of modified carbon nanotubes
[0060] Add 1g of carbon nanotubes and 0.05g of hyperbranched polyaniline into 50mL of dimethyl sulfoxide, stir at 25°C and sonicate for 20 minutes, add 100mL of methanol to precipitate, filter and wash, and dry in vacuum at 50°C for 24 hours , to obtain modified carbon nanotubes. Its X-ray diffraction spectrum and Raman spectrum are as follows Figure 9 and 10 shown.
Embodiment 3
[0062] 1. Preparation of hyperbranched polyaniline
[0063] Prepare hyperbranched polyaniline according to embodiment 1 technical scheme.
[0064] 2. Preparation of modified carbon nanotubes
[0065] Add 1g of carbon nanotubes and 0.1g of hyperbranched polyaniline into 50mL of dimethyl sulfoxide, stir at 25°C and sonicate for 20min, add 100mL of methanol to precipitate, filter and wash, and dry in vacuum at 50°C for 24 hours , to obtain modified carbon nanotubes. Its X-ray diffraction spectrum, Raman spectrum and conductivity are as follows Figure 9 , 10 and 11.
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