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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.
eom
Do you write stupid shit on purpose to see if we're paying attention?
I understand that it would make it easier to get rid of biofilms, but didn't we just go through learning that ingested PTFE isn't a good thing in the long run?
I can see there a hydrophobic coating would be useful, but I would be leery of having it be something always in contact with food.
I've always hoped someone would take the values of Shrinky-Dink seriously.
It would seem that they have rediscovered house wrap.
Is it also trump repellent? Will it keep the filthy residue of Dondolf trumpler off of our nation?
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.
They almost had me.
It's 10 nanometers. A 10mm thick layer of PTFE would be massive.
Browsing at +1 - no ACs, I ignore their posts. So refreshing!
I know, right?
Why can't we all use universal measurements like the meter (1 ten millionth the distance through Paris from the pole to the equator), or the second (1/86400 of the mean solar day), or the kilogram (mass of a lump of metal in Paris, with no relevance to anything), the degree Kelvin ( 1/273.15 the temperature of the triple point of water)?
If we ever meet aliens, they would be totally confused by the American, which use traditional folklore measurements!
> Mumble mumble mumble chemicals safe mumble mumble.
On the other hand, the Teflon does reduce dihydrogen monoxide contamination on the surfaces, so it somewhat balances out.
I remember that being all the rage a while ago.
doesn't exactly sound ideal for a car's aerodynamics.. or are they going to engineer them into small dimples like a golf ball?
The truth is ugly, very ugly, and it is something most of us find it very hard to swallow ---
WE ARE ALL SHEEP
No matter what nationality you have, no matter to which government you pay your tax to, you are sheep
If you are not a sheep, why would you give away your hard earned money to some one else which has no relation to you?
If you are not a sheep, why should you obey the many stupid laws on the book?
If you are not a sheep, why should you obey the instruction from someone who call himself/herself a cop?
Face it, we are all sheep
Muchas Gracias, Señor Edward Snowden !
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.
Maybe I'm missing something, but all the praise seems to be around the ability to repel water.
What if something gets dirty from something airborne like exhaust fumes or atmospheric haze or something?
Am I able to wash that off?
If not, it's not self-cleaning, not even 'cleaning-neutral', but actively 'cleaning-resistant'.
It's not the Teflon that's thick, it's the author of the summary. What a cretin.
I've always wanted a car that looked like a shriveled up ball sack, but I thought the demographic must have been too small.
could have fooled me...
Donald 'Duck' Dunn: We had a band powerful enough to turn goat piss into gasoline.
I wonder if this would work with Teflon's more transparent cousin.