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

SOLARBAN 60 STARPHIRE glass supports unique forested atmosphere inside new glass-domed headquarters.
At the same time and place, the WinDoor-tech trade fair brings together manufacturers and distributors of machines and components for the production of windows, doors, gates and facade systems, as well as designers and representatives of the scientific community.
Trivago is a popular tech start-up company that allows users to compare prices of hotels and booking sites and share their travel experiences.
13 new acoustic glazed units with the Rw values ranging from 41 to 48 dB have been added to the Press Glass offer.
Topglass has completed works on project Bon Secours for Nautic.
The architect selected Guardian SunGuard® SuperNeutral® (SN) 70/37 on Guardian ExtraClear float glass for the glazed façade, windows and impressive-looking atrium.

From industry

Portuetxe bidea 18
20018 San Sebastián (Gipuzkoa) Guipúzcoa

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

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


Diamon-Fusion International, Inc.
Unelko Corporation
Diamon-Fusion International, Inc.
Diamon-Fusion International, Inc.

Add new comment