Engineers bounce water off superhydrophobic surfaces
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- čas přidán 20. 05. 2014
- #BYU mechanical engineering professors Julie Crockett and Dan Maynes study superhydrophobic surfaces, or surfaces that are extremely difficult to get wet. In layman's terms, it's the most extreme form of water proof. In their lab they're analyzing how water beads up or bounces off the superhydrophobic surfaces they are creating by etching microscopic ridges or posts onto CD-sized wafers.
Engineers like Crockett and Maynes have spent decades studying superhydrophobic surfaces because of the plethora of real-life applications. And while some of this research has resulted in commercial products that keep shoes dry or prevent oil from building up on bolts, the duo of BYU professors are uncovering characteristics aimed at large-scale solutions for society.
Their recent study on the subject, published in academic journal Physics of Fluids, finds surfaces with a pattern of microscopic ridges or posts, combined with a hydrophobic coating, produces an even higher level of water resistance--depending on how the water hits the surface.
Video produced by BYU NEWS
Producer: Julie Walker
Photographer: Brian Wilcox
Editors: Michael Gordon, Samuel Reimer
Seven Of Nine is still looking great, and contributing to the benefit of mankind.
Literally laughed out loud
Superhydrophobic toilet seats in the future please!
boom
Why stop there? Make the toilets and shower cabinets and bath tubs super hydroph. and you wont have to clean or flush them....... Cars would be a good start. And kids......
Dr Chunlei Guo at the University of Rochester, the inventor of this technique, got a grant from the Gates foundation to study this in toilet fixtures, for better sanitation in developing countries without abundant water supply (as is part of their mission). You'll have to ask him how it's going...
Make laptops out of these.
u first still waiting
Coating boats and ships with this would reduce the friction drag and speed up water travel!
But if water just runs off, would boats just sink? :O
I'm messing about. I know they wouldn't. :')
TheDeadlyPianist boats wouldn't sink from loss of friction. Boats float due to buoyancy, not friction
Josh Deffenbaugh I was making a simple joke... If I have to explain it, then it really isn't worth it. Hence the second part of my comment.
TheDeadlyPianist yea well, nobody found it funny. Quite honestly, the only way you would come with the joke would be if that's what you thought would happen in the first place.
Josh Deffenbaugh Yes. Of course. I've studied Physics in college and am in Uni training to be a college Maths teacher. I'm dumb enough to believe that a boat would sink were it made of this.
Honestly, it was more sarcasm, and supposed to be humourous, not funny.
Pro swimmers and divers would appreciate to have this on their goggle lenses. Goggle fog is the most persistent annoyance in the pool.
build me a windshield!
Well explained! We use hydrophobic coatings extensively in industries and on solar panels here in India.
Coating airplanes with this substance would pretty much mean you'd never have to de-frost a single airplane ever again in the winter. Imagine the cost savings...
Sorry for the late reply to this question - actually superhydrophobic surfaces are great at reducing ice adhesion, but only up to a certain speed or temperature, then they actually increase the ice adhesion strength. Might be great for satellite dishes but not so much for planes, as Airbus found out. A different texture is needed here that prevents ice nucleation in the first place - directional riblets. We're working on all of these!
i was thinking how many more times she was going to say superhydrophobic surfaces
Awesome material, can't wait to see the aplications.
Plus, thumbs up for women in science! Yay!
Tennis but only water balls and every surface in the court is hydrophobic
I am a fan of yours research papers in Physics of Fluids
Excellent!
so how do you make the nano sized air pockets and how much better is that then the spray on stuff
This amaizing
Where we get your journal, so we can learn that, can ou share the link?
This made me thirsty.
super hydrophobic ball bearings.... a coating for ferrofluid joints/hydraulics.... to make railgun with microfluidic channels in the rail firing super hydrophobic rounds that glide over the rail easier because it is repelled by the microfluid circuits.
No friction from drag = high velocity.
Step 1 : Imagine
Step 2 : Profit.
Amazing!
Can this thing stop ice building up on roofs and drive ways at winter?
thanks
How to make that?
Amazing
Someone needs to do a super hydrophibic tesla valve video. Curious if less drive would equaly more pressure.
Just a thought/question: What would happen if a diver was to wear a fullbody suit of this superhydrophobic material and staying true to his hobby, then goes diving?
The reality? Not much. The superhydrophobic surface would form a platron layer (think spider or water skeeter in water) and the diver would shimmer. As the pressure increases the water will be forced onto the surface. We are looking at drag reduction, but those effects require very large surface features which in turn wet at lower and lower pressures.
When he drops in the he would have a pocket of air around him, like sitting in a bubble with no water. Just for a second, then the bubble would pull from his body, and water rushes in. Pretty cool. Type hydrophobic torpedo or hydrophobic ball bearing. They explain the idea, and show a slow mo comparison with and without hydrophobic coating.
At Rockwell Automation's world headquarters, research has been proceeding to develop a line of automation products that establishes new standards for quality, technological leadership, and operating excellence. With customer success as our primary focus, work has been proceeding on the crudely conceived idea of an instrument that would not only provide inverse reactive current for use in unilateral phase detractors, but would also be capable of automatically synchronizing cardinal grammeters.
Such an instrument comprised of Dodge gears and bearings, Reliance Electric motors, Allen-Bradley controls, and all monitored by Rockwell Software is Rockwell Automation's retro-encabulator.
Now basically the only new principle involved is that instead of power being generated by the relative motion of conductors and fluxes, it's produced by the modial interaction of magneto-reluctance and capacitive diractance. The original machine had a base plate of pre-famulated amulite surmounted by a malleable logarithmic casing in such a way that the two spurving bearings ran in a direct line with the panametric fan.
The line-up consisted simply of six hydrocoptic marzel vanes so fitted to the ambifacient lunar wane shaft that side-fumbling was effectively prevented. The main winding was of the normal lotus-o-deltoid type placed in panendermic semiboloid slots of the stator, every seventh conductor being connected by a non-reversible tremie pipe to the differential girdle spring on the up-end of the grammeters.
Moreover, whenever fluorescent score motion is required, it may also be employed in conjunction with a drawn reciprocation dingle arm, to reduce sinusoidal depleneration.
The retro-encabulator has now reached a high level of development, and it’s being successfully used in the operation of milfer trunnions.
Glad to see seven of nine is doing well
awesome
Superhydrophobic for everyone!
What happens if oil gets on these surfaces?
Tends to gum up the works, but the textures shown can be altered with the same techniques. Instead of spikes or posts to repel water, they look like mushrooms or penguins to repel different grades of oil (oleophobicity).
I'll take 20
Studio C University!
but how durable are they?
It depends. That is one of the big areas of research for chemists and commercial coating companies. People are looking into to naturally hydrophobic surfaces, surfaces that become scratched and just expose a new hydrophobic layer, and looking at tougher chemicals and better adhesion. I don't think too many coating could take repeated abrasion or immersion in contaminants.
neato!
Very cool. Julie Crockett is the perfect spokesperson for scientific endeavors. Easy on the eyes and a very large brain. :D
I wonder the reaction of a super fluid falling on this material.
those QQ eyes lol
Just saying, water bounces like a ball naturally without this hydrophobic coating, high speed cameras can show drops being dropped into a puddle of water and bouncing multiple times, along with raindrops, it's just physics
I don't think you understand. These surfaces will never get wet. Water is incapable of sitting on it. Instead it will just run off.
I think she, as an actual scientist knows what she's doing a lot more than you believe you know.
I understand completely what a hydrophobic coating is, I have neverwet( even though this is a little different) but it's misleading title, " scientist bounce water off superhydrophobic coating", water bounces already, they aren't bouncing it because of the coating.
***** I work in the lab where they filmed the video. It is true that water can bounce, but because of lower attractive forces, more of that kinetic energy can be elastically restored. If a surface is hydrophilic, or even superhydrophylic, the water will rapidly wet the surface preventing bouncing, except for satellite droplets that form when the droplet is moving fast enough that the momentum exceeds the surface tension forces (high Weber number impact).
***** even though they said ''engineers bounce water off of super hydrophobic surfaces'' doesn't mean you cant bounce water off of other surfaces. You just took it the wrong way
I am thinking of a superhydrophobic submarine...
I suspect the government is way ahead of you! Good thought!
Coat this on ships.
She forgot the applications in sports science!
What kind of applications??? We are always looking for more uses for superhydrophobic surfaces.
Personally I would love to coat a car both paint and glass.
1:48
UK's 4,5/10 Pellizzari..
Good luck finding application for this..
You could..piss on it and use it to make tissues Red and more Rough..
But not if they cannot be there when you doing it..
They wanted to feel it all..
That's why They Were the Kaiser Choice from 1490..
And also why the Sacred Roman Empire started having Emperor always more of Eastern and Germanic Origins..
Because Pellizzari enjoyed their Ketones Piss soo much they autoproclaimed them Saints !
A "Miracle" made of Spilled Blood and Piss.
FIRST :D
Nice video btw
Biomimicry.
She's beautiful
+Cameron Rich Agreed!
There's an engineer explaining her work and all you can remark is that she's beautiful. Wow.
More evidence that God's creation was first and better than mans. 🙏
The professor is too hot!
Seven people voted for obama. Nuff said.
could you edit Julie's voice any more to make her say things she's not saying? It's like forming sentences from every word she's ever said. Edit the audio a little bit, its a great video but its very jarring altogether.