A kind of powdery carbon aerogel and its preparation method and application
A technology of carbon aerogel and powder, which is applied in the field of powder carbon aerogel and its preparation, which can solve the problems of being unable to meet diverse needs and achieve the effect of preventing gel condensation and agglomeration
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Embodiment 1
[0028] Embodiment 1: the preparation of a kind of powdery carbon aerogel
[0029] Add 10g of resorcinol and 13.08ml of formaldehyde solution with a mass fraction of 38.5% in a 50ml round bottom flask, then add 14.832ml of distilled water, stir to make it fully dissolve, then add 0.065g of hexadecyl trimethyl ammonium bromide, and the mixed solution was placed in a water bath at 85° C. and stirred at a speed of 270 r / min for five days. The resultant was taken out, washed with distilled water, and filtered under reduced pressure. Then put it into an oven at 60° C. for 24 hours, and then put it into an oven at 100° C. for 12 hours to obtain a powdery organic airgel. The obtained powdered organic airgel was loaded in an alumina crucible and placed in a carbonization furnace. Under a nitrogen atmosphere with a flow rate of 100ml / min, the temperature was raised to 900°C at a heating rate of 5°C / min, carbonized at a constant temperature for 3 hours, and then naturally cooled to At ...
Embodiment 2
[0035] Embodiment 2: the preparation of a kind of powdery carbon airgel
[0036] Add 10g of resorcinol and 13.08ml of formaldehyde solution with a mass fraction of 38.5% in a 50ml round bottom flask, and add 14.832ml of distilled water, stir to make it fully dissolve, then add 0.065g of hexadecyl trimethyl ammonium bromide, and the mixed solution was placed in a water bath at 85° C. and stirred at a speed of 270 r / min for five days. The resultant was taken out, washed with distilled water, and filtered under reduced pressure. Then put it into an oven at 60° C. for 24 hours, and then put it into an oven at 100° C. for 12 hours to obtain a powdery organic airgel. The obtained powdered organic airgel was loaded in an alumina crucible and placed in a carbonization furnace. Under a nitrogen atmosphere with a flow rate of 100ml / min, the temperature was raised to 1200°C at a heating rate of 5°C / min, carbonized at a constant temperature for 3 hours, and the temperature was naturally ...
Embodiment 3
[0040] Embodiment 3: the preparation of a kind of powdery carbon airgel
[0041] Add 10g of resorcinol and 13.08ml of formaldehyde solution with a mass fraction of 38.5% in a 50ml round bottom flask, and add 14.832ml of distilled water, stir to make it fully dissolve, then add 0.065g of hexadecyl trimethyl ammonium bromide, and the mixed solution was placed in a water bath at 85° C. and stirred at a speed of 270 r / min for five days. The resultant was taken out, washed with distilled water, and filtered under reduced pressure. Then put it into an oven at 60° C. for 24 hours, and then put it into an oven at 100° C. for 12 hours to obtain a powdery organic airgel. Load the obtained powdery organic airgel with alumina and place it in a carbonization furnace. Under a nitrogen atmosphere with a flow rate of 100ml / min, the temperature is raised to 1400°C at a rate of 5°C / min, carbonized at a constant temperature for 3 hours, and then cooled to room temperature naturally. , to obtai...
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