A kind of carbon nanotube airgel and its preparation and application
A carbon nanotube, aerogel technology, applied in the direction of nano carbon, carbon compounds, electrical components, etc., to achieve the effect of simple preparation process, large surface area, and large-scale production
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Embodiment 1
[0024] Weigh 6.8g of pentaerythritol into a flask, add 29.40g of phosphoric acid, distill under reduced pressure (vacuum degree of 0.1MPa), stir, heat to 120°C, and keep warm for 1.5h to obtain a light yellow transparent viscous pentaerythritol phosphate liquid. Add 120mL of ethanol and 16.38g of melamine into another round bottom flask, stir well for 1.5h, pour the pentaerythritol phosphate synthesized in the previous step into the melamine with ethanol dispersant, heat to 80°C, stir and reflux for 6h, A white emulsion was obtained, a large white solid was rotovapped, and a white solid was obtained. Weigh 2 g of the expanded precursor and 5 mg of carbon nanotubes and mix them uniformly in a mortar. Put the mixture in a quartz boat, under nitrogen atmosphere, raise the temperature to 350°C at a rate of 5°C / min, keep it for 0.5h, continue to raise the temperature at a rate of 5°C / min to 900°C, keep it for 2h, cool to room temperature and take it out carbon nanotube airgel. Ca...
Embodiment 2
[0026] Weigh 6.8g of pentaerythritol into a flask, add 29.40g of phosphoric acid, distill under reduced pressure (vacuum degree of 0.1MPa), stir, heat to 120°C, and keep warm for 1.5h to obtain a light yellow transparent viscous pentaerythritol phosphate liquid. Add 120mL of ethanol and 16.38g of melamine into another round bottom flask, stir well for 1.5h, pour the pentaerythritol phosphate synthesized in the previous step into the melamine with ethanol dispersant, heat to 80°C, stir and reflux for 6h, A white emulsion was obtained, a large white solid was rotovapped, and a white solid was obtained. Weigh 2 g of the expanded precursor and 10 mg of carbon nanotubes and mix them uniformly in a mortar. Put the mixture in a quartz boat, under nitrogen atmosphere, raise the temperature to 350°C at a rate of 5°C / min, keep it for 0.5h, continue to raise the temperature at a rate of 5°C / min to 900°C, keep it for 2h, cool to room temperature and take it out carbon nanotube airgel. C...
Embodiment 3
[0028] Weigh 6.8g of pentaerythritol into a flask, add 29.40g of phosphoric acid, distill under reduced pressure (vacuum degree of 0.1MPa), stir, heat to 120°C, and keep warm for 1.5h to obtain a light yellow transparent viscous pentaerythritol phosphate liquid. Add 120mL of ethanol and 16.38g of melamine into another round bottom flask, stir well for 1.5h, pour the pentaerythritol phosphate synthesized in the previous step into the melamine with ethanol dispersant, heat to 80°C, stir and reflux for 6h, A white emulsion was obtained, a large white solid was rotovapped, and a white solid was obtained. Weigh 2 g of the expanded precursor and 20 mg of carbon nanotubes and mix them uniformly in a mortar. Put the mixture in a quartz boat, under nitrogen atmosphere, raise the temperature to 350°C at a rate of 5°C / min, keep it for 0.5h, continue to raise the temperature at a rate of 5°C / min to 900°C, keep it for 2h, cool to room temperature and take it out carbon nanotube airgel. C...
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