Show Details

Anti-Fog Coating

March 20, 2013

A new anti-fog coating for windshields and eyeglasses also staves off frost.

Transcript

BOB HIRSHON (host):

Fighting fog and frost.  I’m Bob Hirshon and this is Science Update.

Engineers at MIT, including material scientist Michael Rubner, have announced a breakthrough in anti-fog technology.  Rubner explains that today’s anti-fog materials are vulnerable to frost – which has a similar effect.

MICHAEL RUBNER (Massachusetts Institute of Technology):

In other words, imagine you’re wearing your glasses and you’re outside on a very cold wintry day, and you go into a humid environment.  You’ll actually get frost forming on the surfaces of your lenses.  And most anti-fog coatings, based on the way they work, would not be able to prevent that.

HIRSHON:
His team’s material not only absorbs small water droplets, as today’s anti-fog coatings do, but also prevents the trapped droplets from freezing.  It also acts as a repellent to larger droplets, so they roll off the surface.  Rubner says it’s well suited for eyeglasses, camera lenses, and car windows.  I’m Bob Hirshon for AAAS, the Science Society.