Weird idea, probably wouldn't work, but... As most rockets tend to use Helium to pressurize the fuel tanks, and this stuff is so light, could it possibly be used to help in recovery of stages by slightly heating the helium saturated graphene filled tanks? Sure, they would still be heavier than air, but the stage maybe bouyant enough to allow for a more soft landing or midair recovery, with a minmal TPS coating on the stages? Mind you, this is assuming a total purge of fuel and oxidizer from the tanks. Heack, maybe purging the tanks to vaccume could do even better? (Yeah, I know, the tanks would likely get crushed as they got lower in that atmosphere due to air pressure difference, even with the internal ribbing and antislosh baffels that many tanks have).Just a thought...Jason
I think that NASA is looking at Aerogel use as an insulator. There's also research into its use as a catalyst (I think that's the right word) to produce hydrogen-based fuels. Maybe it could be part of a fuel cell process, for example.
Could also be used to store gelled propellants I suppose.