That may or may not be the ticket, as you will need to be using liquified CO2 to make this stuff, and in the supercritical drying process you're looking at a vapor pressure within the dryer on the order of around 750 psi at a room temperature of 15C (59 F), 850 psi at 25C (77F).

This condition would then need to be maintained for 2-3 days depending on the matrix so the liquid CO2 can infuse into the gel mixture.

The supercritical drying part requires an even higher chamber pressure of around 1,400 psi. With a safety factor of 1.5, that comes out to 2,100 psi, so you're effectively engineering for 2,250 psi.

www.aerogel.org/?p=1344

2,250 psi over a large surface area means a lot of force within the vessel. In the event of a catastrophic failure, even 1,400 psi is both explosive & lethal.

Not to worry, this can be solved with White engineering, and some money.