Why Do Superhydrophobic Materials Never Get Wet?
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- เผยแพร่เมื่อ 28 พ.ค. 2024
- This week Reactions is taking at look at the chemistry behind superhydrophobic substances. Watch as the Reactions team uses a high-speed camera and some brave volunteers to bring the science of staying dry to life.
For more water-repelling chemistry, check out this great graphic from our friends at C&EN and Compound Interest: cen.acs.org/articles/94/i15/Pe...
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Narrator/fact checker:
Kyle Nackers
Co-host:
Mallory Hinks, Ph.D.
Co-writer:
Sophia Cai
Producer:
Sean Parsons
Executive Producer:
Adam Dylewski
Scientific consultants:
Neelesh Patankar, Ph.D.
Robin Ras, Ph.D.
Scientific consultant/co-writer:
Darcy Gentleman, Ph.D.
References:
phenomena.nationalgeographic.c...
cen.acs.org/articles/92/web/20...
cen.acs.org/articles/90/i11/Sp...
cen.acs.org/articles/90/web/20...
cen.acs.org/articles/84/i24/Ra...
en.wikipedia.org/wiki/Superhy...
pubs.acs.org/doi/pdfplus/10.10...
phys.org/news/2015-12-superhyd...
www.spillcontainment.com/produ...
• The SECOND Official Ul...
www.hydrobead.com/
pubs.acs.org/doi/pdfplus/10.10...
nice.asu.edu/nano/super-hydro...
www.prnewswire.com/news-releas...
www.sandia.gov/research/resear...
file.scirp.org/pdf/JSEMAT20120...
• The Official Ultra-Eve...
www.google.com/url?sa=t&rct=j...
www.azom.com/news.aspx?newsID=...
www.upi.com/Odd_News/2015/03/2...
cen.acs.org/articles/94/i15/Pe...
cen.acs.org/articles/94/i11/Wr...
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If you could make one thing superhydrophobic, what would it be? Let us know in the comments. I, for one, would make a superhydrophobic towel to totally confuse people at the beach.
pizza
Toilet paper
Umm, human body! :D
Yes, towels like that tend to weigh under 25lb. unlike salt-ridden ones! The nanosilver-coated sponge in the toilets too, yes! Surely the nod to Thirsty Public Service of the waste treatment of towns; not cool, easement blockers (and at-altitude demonstrator not so much as trying to use jackfruit to put a sanitary pad on a wall.) Not PTFE without a reverse logistics (waste and recycling) chain for that teratogenic molecule. ACS, you should'a panned to Langmuir for this; otherwise it's all texture and little chemistry.
Will this technology withstand 10tons of pressure consistently
( for a press )
My cat resists water much better.
2:36 Just to add the reason _why_ hydrophobic materials repel water: is because water doesnt stick to a surface of negatively charged particles , which super hydrophobic surfaces are.
Otherwise, the water wil still stick to your nano-bumpy surface just fine.,
Its the positive to negative hydrogen bonding that occurs when two water molecules come into contact. It's what that make water so sticky. To prevent water sticking to your surface, you must deny the water molocule the positively charged foothold it needs to initially grip onto, like a hydrophobic surfaces does.
Okay, but what's the actual chemistry? What does the spray contain?
Lauren Bradbury look at 3:00
Cory Delbovo I saw the PTFE (as fiber in raincoats, e.g.) but missed polydimethylsiloxane in the next frames. Thanks!!
Yeah RainX uses the siloxane. It's ok for mild rain, but not good for heavy, and wipers rub off the coating quickly.
Cory Delbovo Well, that certainly matches and explains my mixed experience with it (Rain-X).
@@toddmaggio2032 uncertain, sir.
Love you guys.
Can you do a pentobarbital synthesis tutorial plz.
How long will the effect of coating last, especially if the object is permanently immersed in a watery solution, such as seawater?
Y'all need to work on clarification and detail
What if you sprayed superhydrophobic coating into water while blending it?
Does this coating keep epoxy off while decorating yeti cups?
suggestions on which one i should try?
Lol that urination resistant paint tho lol I live in SF so that's intense
if the shirt is hydrophobic how do you wash it?
the real question.
Inside out.
@@Cineenvenordquist Outside In.
"Gotch Squard"
Are these PTFE, siloxane sprays safe for waterproofing my phone
Not quite to that level yet. I'd get a weatherproof case.
They'll just make it a bit water resistant.
I would cover my paintball gear in it!!!
ScienceAIR you've got some interesting videos!
There were 420 likes and i ruined it, i apologize
OMGMM
o my good mythical morning
Turbo Splash approves of this
Acid vs hydrophobic material
this didn't say anything about why superhydrophobic materials never get wet.
Because they are superhydrophobic
thanks for revealing nothing, i leave with " a waxy surface with spikes."
Just to add the reason why hydrophobic materials repel water: is because water doesnt stick to a surface of negatively charged particles , which super hydrophobic surfaces are.
Otherwise, the water wil still stick to your nano-bumpy surface just fine.,
Its the positive to negative hydrogen bonding that occurs when two water molecules come into contact. It's what that make water so sticky. To prevent water sticking to your surface, you must deny the water molocule the positively charged foothold it needs to initially grip onto, like a hydrophobic surfaces does.
Not really enlightening video, doesn't explain how the material interacts with water to repel it. Very superficial and shallow information, #Reactions... =/
First official comment .