Method for preparing zirconium dioxide aerogel with different microtopographies
A technology of zirconia and microscopic morphology, applied in zirconia, chemical instruments and methods, colloid chemistry, etc., can solve the problem of single morphology
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Embodiment 1
[0027] Example 1: Fibrous zirconia aerogel was prepared as follows:
[0028] 1) Configure zirconium salt precursor solution: 19.3g ZrOCl 2 ·8H 2 O was added to 60 mL of absolute ethanol, where [Zr 4 + ]=1mol / L, seal with plastic wrap, stir on a magnetic stirrer until completely dissolved.
[0029] 2) Add 1.5 g of polyethylene oxide to 60 mL of the above-mentioned zirconium salt precursor solution, and stir to obtain solution one;
[0030] 3) Prepare gel accelerator solution: add 1.4713 g of glutamic acid to 10 mL of deionized water, stir until dissolved, and the concentration of glutamic acid in the solution is 1 mol / L.
[0031] 4) All the glutamic acid solution was added to solution one, stirred rapidly, sealed and placed in a 45°C environment for 2 hours to obtain a wet gel; put the wet gel into a glass dish filled with absolute ethanol, After sealing, it was placed in an oven at 40°C for 5d aging.
[0032] 5) the wet gel obtained after aging is put into the autoclave ...
Embodiment 2
[0034] Example 2: The aerogel material was prepared as follows:
[0035] 1) Configure zirconium salt precursor solution: 12.318g Zr(SO 4 ) 2 ·4H 2 O was added to 60 mL of absolute ethanol, where [Zr 4+ ]=1mol / L, seal with plastic wrap, stir on a magnetic stirrer until completely dissolved.
[0036] 2) 5 mL of formamide was added to 60 mL of the above-mentioned zirconium salt precursor solution, and stirred to obtain solution 1;
[0037] 3) Configure gel accelerator solution: add 1.4713 g of glutamic acid to 10 mL of deionized water, stir until dissolved, and the concentration of glutamic acid in the solution is 1 mol / L.
[0038] 4) All the glutamic acid solution was added to solution one, stirred rapidly, sealed and placed in a 25°C environment for 2 hours to obtain a wet gel; put the wet gel into a glass dish filled with absolute ethanol, After sealing, it was placed in an oven at 40°C for 5d aging.
[0039] 5) put the obtained wet gel after aging into the autoclave of th...
Embodiment 3
[0041] Embodiment 3: prepare submicron spherical zirconia aerogel material as follows:
[0042] 1) Configure zirconium salt precursor solution: 19.3g ZrOCl 2 ·8H 2 O was added to 60 mL of absolute ethanol, where [Zr 4 + ]=1mol / L, seal with plastic wrap, stir on a magnetic stirrer until completely dissolved.
[0043] 2) 1 mL of formamide was added to 60 mL of the above-mentioned zirconium salt precursor solution, and stirred to obtain solution 1;
[0044] 3) Configure gel accelerator solution: add 1.4713 g of glutamic acid to 10 mL of deionized water, stir until dissolved, and the concentration of glutamic acid in the solution is 1 mol / L.
[0045] 4) Add all the glutamic acid solution to solution one, stir quickly, seal and put it into a 70°C environment for 1 hour to obtain a wet gel; put the wet gel into a glass dish filled with absolute ethanol, After sealing, it was placed in an oven at 40°C for 5d aging.
[0046] 5) put the obtained wet gel after aging into the autoc...
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