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Thin Water Acts Like a Solid
Roland Piquepaille writes "What happens when you compress water in a nano-sized space? According to Georgia Tech physicists, water starts to behave like a solid. "The confined water film behaves like a solid in the vertical direction by forming layers parallel to the confining surface, while maintaining it's liquidity in the horizontal direction where it can flow out," said one of the researchers. "Water is a wonderful lubricant, but it flows too easily for many applications. At the one nanometer scale, water is a viscous fluid and could be a much better lubricant," added another one."
That's for gasses.... The article discusses... water as a liquid, acting as a solid... so no, Pressure (Pa) * Volume (m^3) != # moles * 8.31* T (K) here.
appleguru.org
Well, you're partially right. The liquid water on frozen water is indeed very slippery. This is what allows ice skaters to skate, the blade glides along a thin film of liquid water. Frozen water on its own, however is not that slick.
Of course, PV=nRT is the ideal gas law, but there is a similar relationship for monolayers -(pi)A = nRT - a 2D analog of the ideal gas law for a layer one molecule thick which is often a liquid on another liquid or on a solid. This is when the monolayer is sparse enough that it acts like a gas, even though it may be comprised of molecules which are liquid at that temperature. Pi in the formula is the film pressure and A is the area. This is not really related to the phenomena described in TFA.
...the future crusty old bastards are already drinking the Kool-Aid.
From what I can tell, F@H touched on this a while ago. I was reading the PS3 F@H articles, browsing through the "what good does F@H do?" and the "F@H is just a feel-good project" comments and looking at the results page when I stumbled across the above PDF and thought "Hey, that looks like something slashdot just reported on."
Alright, you know, if you had asked me this question, way back when, I would have said it acts like a solid. Why is this news, am I missing something?
Politics is the art of looking for trouble, finding it everywhere, diagnosing it incorrectly and applying the wrong fix.
That's not supposed to be -pi*A = nRT, but just pi*A = nRT. I should have used a colon instead of a dash.
...the future crusty old bastards are already drinking the Kool-Aid.
A silicone lubricant will solve that problem for ya.
OK, I read the paper, DOI: 10.1103/PhysRevB.75.115415.
They did experiment with a Molecular Iamge PicoPlus AFM with the funny sound proof box and rubber bands, if you saw such a system you will know what I mean. The tip they used had a stiff cantilever and was "likely to be oxidized". They carefully controlled the sample surface and make it perpendicular to the tip. And they did the experiment on three surface, mica, soda lime untreated glass and highly oriented hydrophobic graphite.
And the result is hydrophilic surfaces showed increased viscosity and the hydrophobic surface showed no change.
There is a spark in every single flame bait point.
sounds like Ice 9 to me
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Water != water-based. Typically water-based includes glycerin, polyethylene glycol, or other substances. The viscosity of pure water is much lower than that of water-based lubricants.
...the future crusty old bastards are already drinking the Kool-Aid.
Yes, liquid water under pressure at room temperature will indeed solidify. You need a hell of a lot of pressure, and the crystal form will be one of the other 12 known forms of ice, not the familiar ice(I) we know and love. In this case, it's actually ice(VII), a high pressure form consisting of two interpenetrating cubic lattices. The interpenetrating lattices allow more water to squeeze into a smaller space than in the liquid. Water is a truly unique substance, from a physical chemistry standpoint. It often acts in ways that go against your physical intuition about how stuff should act. The obvious example everyone knows is the fact that the solid form is less dense than the liquid (so that ice floats), but there are many others. Lots of good reliable info here: http://www.lsbu.ac.uk/water/
Yep..Oil/petroleum-based lubricants have been proven to deteriorate the latex in the condom and aren't safe at all, fyi.
If I'm not mistake, solid water isn't actually slipper in and of itself.. its the thin layer of liquid water we create whenever touching it and applying pressure. Look up curling.
Of course I'm open to enlightenment if I've got something wrong.
Aikon-