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[NBC News] Weapons maker finds cheap way to get clean water - Page 2

post #11 of 38
Quote:
Originally Posted by Emmanuel View Post

Lol don't they teach what reverse osmosis is in high school in Canada?

they do teach it in canada... not very in depth in high school tho..most students just sleep through chem class
 
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post #12 of 38
Quote:
Originally Posted by Bit_reaper View Post

Yes in the same way a diamond is only a pretty lump of tightly packed carbon.

can you tell me the difference between graphene and graphite(pencil lead)?
post #13 of 38
I think this was an accidental discovery like CocaCola.

Lockheed was probably interested in deicing and the strength to weight ratio of graphene which is supposedly "lighter, stronger, harder and more flexible than steel"
and
"Using graphene's conductive properties and thinking outside the box, SAAB filed a patent application in February 2013 detailing a de-icing process with graphene at its core. "
http://www.aviationpros.com/news/10896910/graphene-aviations-deicing-revolution

edit: also I think MIT was first
http://pubs.acs.org/doi/abs/10.1021/nl3012853
Edited by AlphaC - 3/20/13 at 10:10am
post #14 of 38
Quote:
Originally Posted by dontpwnmebro View Post

can you tell me the difference between graphene and graphite(pencil lead)?

Well, technically all pure carbon is graphene. A pile of graphene is graphite. graphene is just one carbon atom thick and arranged in a perfect pattern. Graphite isn't very strong because it is filled full of air pockets and not organized. This all about structure.
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post #15 of 38
Quote:
Originally Posted by dontpwnmebro View Post

can you tell me the difference between graphene and graphite(pencil lead)?

I fairly certain its the layering. Graphite is many layers of graphine. Making a perfect 1-atom think sheet of graphite gives you graphene, which gets most of its important properties from the fact that it is only one layer. More than one layer changes it electrical and structural properties completely.

Much like a diamond only gets its diamond properties because the carbon aranges in a specific way.
    
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post #16 of 38
Thread Starter 
Quote:
Originally Posted by AlphaC View Post

I think this was an accidental discovery like CocaCola.

Lockheed was probably interested in deicing and the strength to weight ratio of graphene which is supposedly "lighter, stronger, harder and more flexible than steel"
and
"Using graphene's conductive properties and thinking outside the box, SAAB filed a patent application in February 2013 detailing a de-icing process with graphene at its core. "
http://www.aviationpros.com/news/10896910/graphene-aviations-deicing-revolution

edit: also I think MIT was first
http://pubs.acs.org/doi/abs/10.1021/nl3012853

Maybe it was an accident, maybe it wasn't. But to the people that don't have consistent access to water, or limited-to-no access to clean drinking water, I don't think it's going to matter one bit
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post #17 of 38
Quote:
Originally Posted by dontpwnmebro View Post

can you tell me the difference between graphene and graphite(pencil lead)?

I can do it as well as wikipedia can
Quote:
Graphene is a substance composed of pure carbon, with atoms arranged in a regular hexagonal pattern similar to graphite, but in a one-atom thick sheet. It is very light, with a 1-square-meter sheet weighing only 0.77 milligrams.

In addition pencil lead is not just graphite but has a clay in it as well among other minor substances. But the main thing is that graphite is not a single sheet but a bunch of small overlapping patches. This is what gives graphite its slippery quality as the patches easily glide over another.
Edited by Bit_reaper - 3/20/13 at 10:23am
    
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post #18 of 38
Quote:
Originally Posted by Art Vanelay View Post

Reverse osmosis is a thing? I thought that was just Gatorade putting random sciencey sounding words together.

Normal osmosis implies a liquid with a certain solution getting mixed to another liquid that presents a lesser concentration, with a semi permeable membrane in between. In this case, if you had fresh water and salt water, the fresh water would go to the salt water, to compensate (decreasing the concentration of the salt water).

Now, reverse osmosis works exactly the opposite: you put a heck of a lot of pressure on the salt water, and make it go through a filter to the fresh water, and you get fresh water. That's why it's called reverse osmosis thumb.gif
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post #19 of 38
Quote:
Originally Posted by prava View Post

Normal osmosis implies a liquid with a certain solution getting mixed to another liquid that presents a lesser concentration, with a semi permeable membrane in between. In this case, if you had fresh water and salt water, the fresh water would go to the salt water, to compensate (decreasing the concentration of the salt water).

Now, reverse osmosis works exactly the opposite: you put a heck of a lot of pressure on the salt water, and make it go through a filter to the fresh water, and you get fresh water. That's why it's called reverse osmosis thumb.gif
Oh god, what is Gatorade doing to my body!?
post #20 of 38
Quote:
Originally Posted by Art Vanelay View Post

Oh god, what is Gatorade doing to my body!?

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