HORRY
CLAP!
Aerogel
material—often referred to as frozen smoke, solid smoke, solid air or
blue smoke—is actually, like all the best things, the result of a
wager. It was first created by Samuel
Stephens Kistler in
1931, after he bet Charles Learned that he could replace the liquid in
a jelly with gas, without causing shrinkage. Turned out, he was right!
To
produce an aerogel, you take a normal gel and then—very slowly and
carefully—remove the liquid, leaving behind just the solid structure.
That process varies depending on the gel in question, but invariably
requires some
complex chemistry to
facilitate removal of the liquid by
supercritical drying,
which carefully avoids the liquid-gas transition by using pressure and
temperature variation to go from liquid to solid to gas instead.
Otherwise, the evaporation process can destroy the structure. The
result is a substance that looks like the original gel but feels like
expanded polystyrene to the touch.
And
the material properties! Oh, the material properties. Just
look at what it can do.
Looks like it would be easy to make on the moon or in orbit....of course the price getting their would be expensive but returning it to earth would be cheap.
ReplyDeleteAll I know is that is one helluva long zipper on that gal.
ReplyDeleteolds-mo-william
NASA used blocks of aerogel as traps and brought back dust grains from the formation of the Solar System: http://news.sciencemag.org/space/2014/03/spacecraft-returns-seven-particles-birth-solar-system
ReplyDeleteHell, I can do that with a handy wipe on my birth certificate.
ReplyDeleteHey iri,
ReplyDeleteAt least you have a birth certificate!
BHO
We used to work with that on the commercial side of the house at NASA. It has a lot of interesting properties, but while it has a lot of strength in one dimension, it is brittle and doesn't handle shear and other forces well. In other words, in normal use it can and does often turn to dust. It's a pity that a lot of the research got dropped, as if some of the problems with it are worked out, it would revolutionize insulation, power cells, and more. Check the MSFC site and/or science.nasa.gov (if still in existence) for some good articles on it.
ReplyDelete