The author doesn't understand the concept of a blimp. The only reason for filling it with helium (or hydrogen) is to counter the atmospheric pressure. Since aerographite doesn't do that (it would just collapse under the pressure) there is absolutely no point in filling a blimp with aerographite.

If you found a way to create a hull that withstand the pressure, and prevents the aerographite from being compressed, why fill it with that stuff in the first place? Just use a vacuum inside your superstrong hull!