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[Gizmag] Graphene aerogel takes world’s lightest material crown - Page 2

post #11 of 24
The process of making aerogel lighter than air would mean making the material in as close to a vacuum as possible, which I'm not even sure is possible.
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post #12 of 24
Quote:
Originally Posted by doomlord52 View Post

Cool tech though. Still waiting on seeing some commercial implementations of this kind of stuff. Aerogel is amazing, but its basically non-existent on the commercial market.

It makes for great insulation...
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post #13 of 24
Quote:
Originally Posted by AndyM95 View Post

Surely it depends on the pressure and temperature of the air? If you gather air from sea level it will be way denser than if you gathered it at 50,000 ft up.
Also, the 'type' of air, the quantity of elements that air contains can vary greatly.

I was thinking of sea level at the time, but really anywhere that isn't above 2000 meters above sea level will be pretty dense. That isn't including any solids that might be floating around either. I mean it isn't like a steel I -beam or anything, but I remember being very surprised at the mass of air in chemistry 141
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post #14 of 24
A piece of it the size of a car would weight around 5 lbs. Damn.
    
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post #15 of 24
Quote:
Oh god. The Galaxy 5 / iphone 6 / whatever: Now it only weighs -6g.

My phone will now slowly float away

Quick, patent that before apple does as part of their "save the iphone from design flaws by making it do tricks in the air" scheme.
    
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post #16 of 24
Quote:
Originally Posted by doomlord52 View Post

Oh god. The Galaxy 5 / iphone 6 / whatever: Now it only weighs -6g.

My phone will now slowly float away rolleyes.gif



Cool tech though. Still waiting on seeing some commercial implementations of this kind of stuff. Aerogel is amazing, but its basically non-existent on the commercial market.

Not to be prissy but an antimatter phone would be awesome tongue.gif(grams is mass and can never be negative however it can be -pounds as that is the force exerted by gravity),
post #17 of 24
so what can aerogel be used for?
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post #18 of 24
Quote:
Originally Posted by Feild Scarecrow View Post

Anyone know if it possible to make a solid that is less dense than air? Nitrogen and oxygen both have more elemental mass than carbon especially because they are diatomic.

The answer is no, and if you think about it the reason is quite elementary: the mean distance between particles in a gas is several orders of magnitude larger than the bond distances in a solid compound. Therefore, any solid will have more atoms in a given volume than a gas at the same conditions. The aerogels are said to have less density than air, but it does not include the mass of air within the nanoscopic voids of the material.
Edited by atomicmew - 3/27/13 at 2:44am
post #19 of 24
Quote:
Originally Posted by dioxholster View Post

so what can aerogel be used for?

It's pretty damn expensive so for most people, or actually a percentage of most people it falls under the cathegory "fun stuff you can buy with your science teacher budget and hold a flame to" The result however is less spectacular than magnesium....
 
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post #20 of 24
Quote:
Originally Posted by Feild Scarecrow View Post

Anyone know if it possible to make a solid that is less dense than air? Nitrogen and oxygen both have more elemental mass than carbon especially because they are diatomic.

These materials are less dense then air.
In fact this one is less dense then helium
Quote:
the ultra-light aerogel has a density lower than that of helium and just twice that of hydrogen.

They claim a density of 0.16 mg/cm3
Air has a density of 1.275 mg/cm3
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