UIC engineer tests improved 'icephobic' coatings

June 2, 2011

(PhysOrg.com) -- While scientists and engineers have developed several products that repel water and, to a lesser degree, snow and ice, considerable room remains for something "new and improved."

University of Illinois at Chicago mechanical and professor Constantine Megaridis hopes that he and his Micro/Nanoscale Fluid Transport Laboratory team at UIC will find new ways to meet this goal.

Megaridis received a $320,000 National Science Foundation grant to investigate what is called "icophobic behavior" by select surfaces. He uses coatings with tunable properties such as controlled micro-to-nanoscale texture that display the ability to repel -- a property called superhydrophobicity -- or the ability to self-clean.

Megaridis's recent research to develop coatings that are both superhydrophobic and self-cleaning has yielded promising results. He now wants to begin research to see if such coatings can be improved, adding the "icephobic" quality and testing that both shed water and .

"The main idea is to be able to provide a skin that's both phobic and electrically conducting -- the latter meaning you can heat it up," he said. "Imagine you have a chunk of ice anchored in a rough, cold surface. Trying to remove it is challenging because the ice is stuck. But if you add heat locally and melt the contact area between the ice and the surface skin, you create a thin lubricating layer for the ice to slip off."

Megaridis's lab work will focus on characterizing various surface coatings to better understand how to make these surfaces improve water beading and roll-off. The shape of the water bead and inclination of a surface for water to roll off are two key properties characterizing surface phobicity, or surface energy -- which defines the affinity between a solid and liquid.

", for example has very low energy. Water won't stick to it," Megaridis said. "Water sticks on metal preventing roll-off. Metals have high ."

Megaridis and his laboratory team hope to learn how to make more durable, ice-repelling coatings for critical and high-value applications, such as energy-generating wind turbine blades.

"When ice deposits on turbine blades, it can rob a big portion of the turbine's output," he said. "Aircraft wing icing is another long-term problem we'd like to work on."

Megaridis says his laboratory has the right tools to study the problem. "We're trying to push science so that products get better in this area," he said. "We want to produce something that has value for the real world."

Part of the NSF grant will support science teachers at Chicago's Benito Juarez Community Academy, a high school in the city's Pilsen neighborhood near the UIC campus. Select students who hope to successfully compete in upcoming science fairs will be given the opportunity to work with UIC students in Megaridis's lab to learn more about scientific career opportunities and the discipline it takes to become a scientist.

"We hope to get these young students excited," he said. "We'll show them how research is being done. We'll also offer access to first-rate scientific research equipment."

Explore further: New Oxford spin-out to transform surfaces

Related Stories

New Oxford spin-out to transform surfaces

September 7, 2006

The latest spin-out company from the University of Oxford, Oxford Advanced Surfaces Ltd, plans to apply surface science to develop a revolutionary coating for materials like plastics and Teflon.

Getting ice, frost off planes problematic

December 22, 2010

The buildup of ice on surfaces can cause problems in many situations: On airplane wings or on their engine turbine blades, ice can both add weight and interfere with a wing’s lift, which can make it impossible to take ...

Recommended for you

For 2-D boron, it's all about that base

September 2, 2015

Rice University scientists have theoretically determined that the properties of atom-thick sheets of boron depend on where those atoms land.

An engineered surface unsticks sticky water droplets

August 31, 2015

The leaves of the lotus flower, and other natural surfaces that repel water and dirt, have been the model for many types of engineered liquid-repelling surfaces. As slippery as these surfaces are, however, tiny water droplets ...

Electrical circuit made of gel can repair itself

August 25, 2015

(Phys.org)—Scientists have fabricated a flexible electrical circuit that, when cut into two pieces, can repair itself and fully restore its original conductivity. The circuit is made of a new gel that possesses a combination ...

Scientists grow high-quality graphene from tea tree extract

August 21, 2015

(Phys.org)—Graphene has been grown from materials as diverse as plastic, cockroaches, Girl Scout cookies, and dog feces, and can theoretically be grown from any carbon source. However, scientists are still looking for a ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.