Home Uncategorized New paint-like coating repels spills and scratches

New paint-like coating repels spills and scratches

Researchers discovered a new paint-like coating that can be added to either soft
or hard materials so make them self-cleaning, superhydrophobic, and
resistant to scuffs and scratches.
This is made from titanium dioxide nanoparticles suspended in an ethanol
solution, the ‘paint’ can be sprayed or dipped onto surfaces, and repels
everything, including oil, which means it’s perfect for use on the
mechanical parts of vehicles.
What’s special about this coating is that, unlike similar
superhydrophobic coatings, which easily rub off surfaces, this one stays
put, even if you try to rub it away with sandpaper. And you don’t need
to tilt the surface downwards to rid if of the little repelled droplets,
because they just bounce off on their own.

“Being waterproof
allows materials to self-clean, as water forms marble-shaped droplets
that roll over the surface, acting like miniature vacuum cleaners
picking up dirt, viruses and bacteria along the way,” lead researcher
Yao Lu, from University College London in the UK, said in a press release.
“For this to happen, the surface must be rough and waxy, so we set out
to create these conditions on hard and soft surfaces by designing our
own paint and combining it with different adhesives to help the surfaces
withstand damage.”

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The team has tested the coating on clothes,
paper, glass, and steel, and says it would be be easily applied to the
surface of cars. 
“The biggest challenge for the widespread
application of self-cleaning surfaces is finding a way to make them
tough enough to withstand everyday damage,” one of the team, Claire
Carmalt, added
“The surfaces tend to be mechanically weak and so rub off easily, but
by pairing our paint with different adhesives, we’ve shown it is
possible to make a robust self-cleaning surface. 
We used materials that
are readily available so our methods can be scaled-up for industrial
You can see it in action in the video below.
Hoping for a day to come, when everything will be superhydrophobic. 


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