New Coating Could Nix Smudges And Fogging On Glass

Materials engineers have created a new type of coating that attracts water yet beads oils – traits that are usually mutually exclusive – promising potential applications such as "self-cleaning" eyeglasses and antifogging car windshields and ski goggles.

The material prevents fogging by not allowing water to form beads on surfaces, said Jeffrey Youngblood, an assistant professor of materials engineering at Purdue University.

The coating consists of a single-molecule-thick layer of a material called polyethylene glycol, and each molecule is tipped with a Teflonlike "functional group" made with fluorine. Water molecules pass through the Teflonlike layer, which acts as a barrier to the larger oil molecules. Then the water is attracted to the polyethylene glycol immediately adjacent to the glass surface.

"So, it repels the oil but not the water," said Youngblood, who is working with materials engineering doctoral student John A. Howarter. "This is important because oil normally sticks to surfaces that attract water, a property we call hydrophilic. However, we now have one that's hydrophilic but that oil doesn't like."

Findings were detailed in a talk presented on Sunday (March 25) during the American Chemical Society's 233rd National Meeting & Exposition, which takes place through Thursday (March 29) in Chicago.

The findings demonstrate how an oily substance called hexadecane beads up on the coating while water spreads out to cover the surface instead of forming beads. Moreover, when water is attracted to the underlying polyethylene glycol layer it gets between the hexadecane and the glass, dislodging the oily film.

"If you place a droplet of oil and a droplet of water right next to each other, the water will move underneath the oil and cause it to fall off of the surface," Youngblood said.

Read the entire news on the source link below.

600450 New Coating Could Nix Smudges And Fogging On Glass

Others also read

SentryGlas® delivers clarity, strength and safety at Shum Yip Upperhills
Laminated glass using SentryGlas® was chosen for safety and insulating glass was specified to improve thermal performance.
Jumbo Glass: Bigger is Just the Beginning
Building design is constantly changing. Today, strict energy codes and ambitious designs are urging architects to evolve their designs, and manufacturers must provide solutions for these emerging challenges.
New: arcon decochrome oHT – chrome mirror with optional tempering
arcon decochrome oHT – mirror-like lustre in chrome.
IfG Glastechnik at glasstec 2018 Stand D21 Hall 15
IfG Glastechnik GmbH, designs and manufactures machinery to apply separating powder and ultrasonic wet spray glass coating systems to all types of sheet glass.
Donau City Tower 1
Designed by Dominique Perrault, Tower 1 of the Donau City (DC) Towers project is a prominent building across the Vienna skyline and is the highest skyscraper in Austria.
VETECO hosts the workshop “BIM in the Façade and Window Industry in Spain”
VETECO, in collaboration with the Spanish Association of Lightweight Façades and Windows, ASEFAVE, and BIMÉTICA, are organising a workshop called “BIM in the Façade and Window Industry in Spain”.

From industry

40 Corniche El-Nil,
Al Sharafain Tower Maadi,
Cairo Governorate

Is Kuleleri, Kule: 2, Kat: 22, 4. Levent
34330 Levent-Istanbul/İstanbul

Portuetxe bidea 18
20018 San Sebastián (Gipuzkoa) Guipúzcoa


POLFLAM Sp. z o.o.
Unelko Corporation
Unelko Corporation
Diamon-Fusion International, Inc.
Diamon-Fusion International, Inc.

Add new comment