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Simple Method Yields A Wrinkly, Durable, Water-Repellent Coating (acs.org)
ckwu writes: Superhydrophobic coatings that make water droplets dance and roll off of a surface show promise for applications such as self-cleaning cars, buildings, and food processing equipment. A new method creates a durable superhydrophobic coating by combining two common materials -- Teflon and a shrinkable plastic -- in a few simple steps. The researchers took inspiration from work done with the polystyrene material found in Shrinky Dinks -- the children's crafting kit. They deposited Teflon onto a similar material called PolyShrink, heated it, and found that the Teflon formed a crinkled surface that caused water to bead and roll off easily. The best results came from polyolefin shrink wrap coated with a 10nm-thick layer of Teflon. What's more, the surface is durable, having about the same scratch resistance as an aluminum coating, and repels water even after being scratched. Update: 03/09 16:10 GMT by T : Note: That's nm, rather than mm; now fixed.
Teflon is incredibly toxic. Teflon is worse than shit. Dupont execs need to be locked away FOREVER. See src=https://en.wikipedia.org/wiki/Perfluorooctanoic_acid. Please god's sake no more. Stop playing with Teflon. Why so much hate for water? Water is life. Cleaning requires detergents for oils not superhydrophobic surfaces.
It went like this. A Meter (Metre in French, meaning step), was the distance stepped off by a french Legionnaire
in the time of Napoleon. Then he told his scientists, "Make it have some relevance to Science" and they came
up with this and that, eventually was the platinum bar at some temperature in the basement somewhere in
Paris. Then the modern scientists came into vogue, and it was 134567368 x the wavelength of some light
emited by an excited atom of some molecule.
I kinda like the Imperial better. Heaven has 360 degrees. 60 minutes in one degree. 1 minute of arc
on the surface of the earth is 6000 feet. 6 ft per fathom. Thus a nautical mile is 1000 fathoms. Then
the damn scientists got into it and said a nautical mile = 6079.7 feet, and fucked it all up. They could
have changed the foot, or the meter, etc. but no.
The final straw was the digital calculator in place of the balance scale. Now nobody remembers why ...
we have 16 ounces to a pound (answer, divide by two on a balance scale: 16,8,4,2,1). Try that
with a kilogram
Napoleon lost his bid for world domination at Waterloo and St. Helena. They should have buried his
meter with his sorry ass arsenicated body.