Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > Hard Rain: Pitt-led Researchers Create Nano-Particle Coating to Prevent Freezing Rain Buildup on Roads, Power Lines

An aluminum plate glazed with Gao's superhydrophobic coating (left) repelling the supercooled water. For the uncoated plate (right), the water freezes on contact and ice accumulates. (Credit: Image courtesy of University of Pittsburgh)
An aluminum plate glazed with Gao's superhydrophobic coating (left) repelling the supercooled water. For the uncoated plate (right), the water freezes on contact and ice accumulates. (Credit: Image courtesy of University of Pittsburgh)

Abstract:
Inspired by water-resistant lotus leaves, the Pitt-developed solution repels freezing rain and provides the first evidence of anti-icing ability in superhydrophobic coatings, team reports in "Langmuir"

Hard Rain: Pitt-led Researchers Create Nano-Particle Coating to Prevent Freezing Rain Buildup on Roads, Power Lines

Pittsburgh, PA | Posted on October 30th, 2009

Preventing the havoc wrought when freezing rain collects on roads, power lines, and aircrafts could be only a few nanometers away. A University of Pittsburgh-led team demonstrates in the Nov. 3 edition of "Langmuir" a nanoparticle-based coating developed in the lab of Di Gao, a chemical and petroleum engineering professor in Pitt's Swanson School of Engineering, that thwarts the buildup of ice on solid surfaces and can be easily applied.

The paper, by lead author and Pitt doctoral student Liangliang Cao, presents the first evidence of anti-icing properties for a burgeoning class of water repellants-including the Pitt coating-known as superhydrophobic coatings. These thin films mimic the rutted surface of lotus leaves by creating microscopic ridges that reduce the surface area to which water can adhere. But the authors note that because ice behaves differently than water, the ability to repulse water cannot be readily applied to ice inhibition. Cao's coauthors include Gao, Jianzhong Wu, a chemical engineering professor at the University of California at Riverside, and Andrew Jones and Vinod Sikka of Ross Technology Corporation of Leola, Pa.

The team found that superhydrophobic coatings must be specifically formulated to ward off ice buildup. Gao and his team created different batches made of a silicone resin-solution combined with nanoparticles of silica ranging in size from 20 nanometers to 20 micrometers, at the largest. They applied each variant to aluminum plates then exposed the plates to supercooled water (-20 degrees Celsius) to simulate freezing rain.

Cao writes in "Langmuir" that while each compound containing silica bits of 10-or-fewer micrometers deflected water, only those with silica pieces less than 50 nanometers in size completely prevented icing. The minute surface area of the smaller fragments means they make minimal contact with the water. Instead, the water mostly touches the air pockets between the particles and falls away without freezing. Though not all superhydrophobic coatings follow the Pitt recipe, the researchers conclude that every type will have a different particle-scale for repelling ice than for repelling water.

Gao tested the coating with 50-nanometer particles outdoors in freezing rain to determine its real-world potential. He painted one side of an aluminum plate and left the other side untreated. The treated side had very little ice, while the untreated side was completely covered. He produced similar results on a commercial satellite dish where the glossed half of the dish had no ice and the other half was encrusted.

A video available on Pitt's Web site shows an aluminum plate glazed with Gao's superhydrophobic coating (left) repelling the supercooled water. For the uncoated plate (right), the water freezes on contact and ice accumulates. The video can be accessed at www.pitt.edu/news2009/ice.html

The "Langmuir" paper is available on Pitt's Web site at www.pitt.edu/news2009/DiGao.pdf

####

About University of Pittsburgh
Founded in 1787 as a small, private school, the Pittsburgh Academy was located in a log cabin near Pittsburgh’s three rivers. In the more than 220 years since, the University has evolved into an internationally recognized center of learning and research.

For more information, please click here

Contacts:
Morgan Kelly
412-624-4356 (office)
412-897-1400 (cell)

Copyright © University of Pittsburgh

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Synopsys and GLOBALFOUNDRIES Collaborate to Develop Industry’s First Automotive Grade 1 IP for 22FDX Process: Synopsys’ Portfolio of DesignWare Foundation, Analog, and Interface IP Accelerate ISO 26262 Qualification for ADAS, Powertrain, 5G, and Radar Automotive SoCs February 22nd, 2019

With nanopore sensing, VCU physics researchers detect subtle changes in single particles: The researchers' findings 'open the door to observe all kinds of interesting phenomenon on nanosurfaces,' an area of great interest to chemists February 21st, 2019

Platinum nanoparticles for selective treatment of liver cancer cells February 21st, 2019

What happens to magnetic nanoparticles once in cells? February 21st, 2019

Chemistry

Rice U. lab adds porous envelope to aluminum plasmonics: Scientists marry gas-trapping framework to light-powered nanocatalysts February 10th, 2019

Kanazawa University research: Chirality inversion in a helical molecule at controlled speeds February 6th, 2019

CEA-Leti Builds Prototype of Next-Generation Mid-Infrared Optical Sensors for Portable Devices: Coin-size, On-chip Sensors that Combine High Performance and Low Power Consumption Presented in Paper at SPIE Photonics West 2019 February 5th, 2019

Platinum forms nano-bubbles: Technologically important noble metal oxidises more readily than expected January 28th, 2019

Possible Futures

Synopsys and GLOBALFOUNDRIES Collaborate to Develop Industry’s First Automotive Grade 1 IP for 22FDX Process: Synopsys’ Portfolio of DesignWare Foundation, Analog, and Interface IP Accelerate ISO 26262 Qualification for ADAS, Powertrain, 5G, and Radar Automotive SoCs February 22nd, 2019

With nanopore sensing, VCU physics researchers detect subtle changes in single particles: The researchers' findings 'open the door to observe all kinds of interesting phenomenon on nanosurfaces,' an area of great interest to chemists February 21st, 2019

Platinum nanoparticles for selective treatment of liver cancer cells February 21st, 2019

What happens to magnetic nanoparticles once in cells? February 21st, 2019

Discoveries

With nanopore sensing, VCU physics researchers detect subtle changes in single particles: The researchers' findings 'open the door to observe all kinds of interesting phenomenon on nanosurfaces,' an area of great interest to chemists February 21st, 2019

Platinum nanoparticles for selective treatment of liver cancer cells February 21st, 2019

What happens to magnetic nanoparticles once in cells? February 21st, 2019

High-speed surveillance in solar cells catches recombination red-handed: Researchers at Osaka University introduce a new time-resolved microscopy method that allows them to monitor the trajectories of fast-moving charged particles at unprecedented rates February 21st, 2019

Announcements

Synopsys and GLOBALFOUNDRIES Collaborate to Develop Industry’s First Automotive Grade 1 IP for 22FDX Process: Synopsys’ Portfolio of DesignWare Foundation, Analog, and Interface IP Accelerate ISO 26262 Qualification for ADAS, Powertrain, 5G, and Radar Automotive SoCs February 22nd, 2019

With nanopore sensing, VCU physics researchers detect subtle changes in single particles: The researchers' findings 'open the door to observe all kinds of interesting phenomenon on nanosurfaces,' an area of great interest to chemists February 21st, 2019

Platinum nanoparticles for selective treatment of liver cancer cells February 21st, 2019

What happens to magnetic nanoparticles once in cells? February 21st, 2019

Automotive/Transportation

Synopsys and GLOBALFOUNDRIES Collaborate to Develop Industry’s First Automotive Grade 1 IP for 22FDX Process: Synopsys’ Portfolio of DesignWare Foundation, Analog, and Interface IP Accelerate ISO 26262 Qualification for ADAS, Powertrain, 5G, and Radar Automotive SoCs February 22nd, 2019

Researchers create ultra-lightweight ceramic material that withstands extreme temperatures: UCLA-led team develops highly durable aerogel that could ultimately be an upgrade for insulation on spacecraft February 15th, 2019

Platinum forms nano-bubbles: Technologically important noble metal oxidises more readily than expected January 28th, 2019

2D materials may enable electric vehicles to get 500 miles on a single charge January 11th, 2019

Aerospace/Space

Researchers create ultra-lightweight ceramic material that withstands extreme temperatures: UCLA-led team develops highly durable aerogel that could ultimately be an upgrade for insulation on spacecraft February 15th, 2019

Superfluidity: what is it and why does it matter? December 20th, 2018

Three CEA Projects Awarded European Research Council Synergy Grants November 26th, 2018

'Smart skin' simplifies spotting strain in structures: Rice U. invention can use fluorescing carbon nanotubes to reveal stress in aircraft, structures November 15th, 2018

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project