Preparation of Dispersed Powder of Amphoteric Carbon Nanotubes
A carbon nanotube and single-walled carbon nanotube technology, which is applied in the fields of nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve the problems of inconvenient storage and transportation of dispersion liquid, easy agglomeration and hardness of powder, and troublesome redispersion. , to achieve the effect of fast dispersing speed, large dispersing degree and improving dispersing performance
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[0030] Example 1:
[0031] Dissolve 0.2g of polyvinylpyrrolidone (with an average molecular weight of 360,000) in 100ml of deionized water at room temperature, then add 0.1g of OP-10 to fully dissolve and mix, add 0.1g of carbon nanotubes to the solution, sonicate for 2 hours, and then add to Stir in a water bath at ℃ for 12 hours to obtain a black carbon nanotube dispersion; centrifuge the resulting black liquid for 5 minutes, and take the upper layer of stable carbon nanotube dispersion; then freeze and thaw the above dispersion in liquid nitrogen repeatedly 3-4 times, Then put the frozen sample in a freeze dryer, quench it to -40°C, and evacuate at the same time until the air pressure in the drying chamber is less than 10 Pa, dry for 12 hours, and take out the sample to obtain dispersed and fluffy carbon nanotube powder.
Example Embodiment
[0032] Example 2:
[0033] Dissolve 0.2g polyvinylpyrrolidone (with an average molecular weight of 360,000) in 100ml deionized water at room temperature, then add 0.1g Tween-20 (Tween-20) to fully dissolve and mix, add 0.1g carbon nanotubes to the solution, ultrasonic After 2 hours, stir for 12 hours in a water bath at 50°C to obtain a black carbon nanotube dispersion; centrifuge the resulting black liquid for 5 minutes, and take the upper layer of stable carbon nanotube dispersion; then freeze the dispersion repeatedly in liquid nitrogen Melt for 3-4 times, then put the frozen sample in a freeze dryer, quench it to -40°C, and vacuum until the air pressure in the drying chamber is less than 10pa, dry for 12 hours, take out the sample, and obtain dispersed and fluffy carbon nanotube powder .
Example Embodiment
[0034] Example 3:
[0035] Dissolve 0.2g of polyvinylpyrrolidone (with an average molecular weight of 720,000) in 100ml of deionized water at room temperature, add 0.1g of carbon nanotubes to the solution, sonicate for 2 hours, and then stir for 12 hours in a water bath at 50°C to obtain black carbon Nanotube dispersion: Centrifuge the resulting black liquid for 5 minutes, and take the upper layer of stable carbon nanotube dispersion; then freeze and thaw the above dispersion in liquid nitrogen repeatedly for 3-4 times, and then put the frozen sample in the freeze dryer ,Quickly cool to -40°C, while evacuating to the drying chamber air pressure less than 10pa, drying for 12 hours, take out the sample, get dispersed and fluffy carbon nanotube powder.
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