PaintSquare.com
      | Connect Follow us on Twitter Like us on Facebook
About | Subscribe | Advertise
  

 

Download our free Specialty Function Coating Systems eResource Book

Paint and Coatings Industry News

Main News Page


New Harvard Coating Gives Ice the SLIPS

Thursday, June 21, 2012

More items for Coating Materials

Comment | More

Harvard University researchers say they have invented a treatment that keeps any metal surface free of ice and frost by effortlessly shedding any condensation through gravity.

The discovery has “direct implications” for a wide variety of metal surfaces used in wind turbines, aircraft, marine vessels, construction and other applications, says the research team, led by Joanna Aizenberg, Professor of Materials Science at Harvard’s School of Engineering and Applied Sciences (SEAS).

 Still images show simulated ice formation by deep freezing and subsequent deicing by heating.

 Photos: Harvard School of Engineering and Applied Sciences

Still images extracted from movies show simulated ice formation by deep freezing (-10°C) in high humidity and subsequent deicing by heating.

The new approach improves on an ice-repellent coating that Aizenberg’s team unveiled last fall. Researchers have since found that the earlier version, inspired by the water-repellant lotus leaf, prevented ice but failed under high humidity as a surface became coated with condensation and frost.

Locking in Lubricant

To combat the problem, the researchers have invented a new technology suited for both high humidity and extreme pressure, Harvard reports in a release. SLIPS (Slippery Liquid Infused Porous Surfaces) are designed to “expose a defect-free, molecularly flat liquid interface, immobilized by a hidden nanostructured solid.”

Water drops, condensation, frost, and even solid ice easily slide off the ultra-smooth slippery surface, the team says.

The challenge was to apply the technology to metal surfaces, but the team developed a way to coat the metal with a rough material to which the lubricant can adhere. The non-toxic, anti-corrosive coating can be “finely sculpted to lock in the lubricant,” said Harvard.

The coating can be applied over a large scale and on arbitrarily shaped metal surfaces, the university reports.

A report on the technology was recently published in the journal ACS Nano.

Deep Freeze Testing

The researchers applied the coating to refrigerator cooling fins and tested it under a prolonged, deep-freeze condition. They said the material “completely prevented frost far more efficiently and for a longer time” than current “frost-free” cooling technology.

 Icephobic coating on aluminum
The team has developed a scalable method to coat an aluminum surface with a nanostructured polymer layer that converts to a slippery liquid-infused porous surface (SLIPS). SLIPS can delay ice formation and shed liquids and solids, even under high humidity, researchers say.

“Unlike lotus leaf-inspired icephobic surfaces, which fail under high humidity conditions, SLIPS-based icephobic materials, as our results suggest, can completely prevent ice formation at temperatures slightly below 0°C while dramatically reducing ice accumulation and adhesion under deep freezing, frost-forming conditions,” said Aizenberg.

The technology also dramatically reduces energy costs since no heat is required for de-icing, the team said.

The work was supported in part by the Materials Research Science and Engineering Center (MRSEC) at Harvard and the Wyss Institute for Biologically Inspired Engineering.

Said Aizenberg: “This new approach to icephobic materials is a truly disruptive idea that offers a way to make a transformative impact on energy and safety costs associated with ice, and we are actively working with the refrigeration and aviation industries to bring it to market.”

   

Tagged categories: Coatings technology; Corrosion protection; Marine Coatings; Protective coatings; Research

Comment Join the Conversation:

Sign in to our community to add your comments.

International Paint LLC
New! Chartek

The next evolution in passive fire protection has arrived! Check out our new line of Chartek products.


Mitsubishi Gas Chemical America
Performance Amine 1,3-BAC

A highly reactive cycloaliphatic diamine offering superior performance. Reasonable cost and curing efficacy makes it suitable for all types of epoxy resin applications.


Polyval Coatings
Polyflex® Polyurea Linings

Polyflex™ new Polyurea Geotextile Membrane System has been specifically engineered to protect the environment in containment applications.
www.polyflexlinings.com


Armakleen Company, The
ARMEX when nondestructive cleaning is critical

When cleaning substrates that cannot be damaged the only blast abrasive to use is ARMEX. Other blast abrasives can remove surface materials damaging the substrate.


Minerals Research & Recovery

HIGH PERFORMANCE ABRASIVES


“Made in the USA!”

Why recycle waste from other countries? Go FASTER, CLEANER, at 1/3 THE COST with MR&R “All-American” Sharpshot®HP!!

WATCH THE VIDEO


SSPC: The Society for Protective Coatings
http://www.sspc.org/

Join SSPC and Enhance
Your Career !


Binks/DeVilbiss
Built for Tough Jobs

From Epoxies to Urethanes to other high solid coatings, the new Binks Airless 75 delivers a great finish using an ergonomic design. Visit binks.com for more information.


Midsun Specialty Products
Stopaq 30+ Year Coatings

Use Stopaq corrosion prevention coatings on pipelines, field joints, tank chimes, structural steel and more. Learn more at www.midsunsp.com/stopaq


Sherwin-Williams
Sherwin-Williams Protective & Marine Coatings

With 4,000 distribution points and 3,700+ years of experience, Sherwin-Williams delivers the products, support and expertise you need, right where you need it.


Hempel (USA) Inc.
HEMPEL PROTECTIVE COATINGS

Efficient systems and high quality products to reduce your maintenance costs. Visit Hempel Protective for more information.

 
 
 
Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design Paint BidTracker

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us
 

© Copyright 2000-2015, Technology Publishing / PaintSquare, All rights reserved
2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail webmaster@paintsquare.com