Durability + Design
Follow us on Twitter Follow us on LinkedIn Like us on Facebook Follow us on Instagram Visit the TPC Store
Search the site

 

Advertisement

Durability + Design (D+D)


D+D News

Main News Page


Lotus Leaf Inspires a Fog-free Finish

Thursday, August 2, 2012

More items for Coatings Technology

Comment | More

Chinese scientists have developed a fog-free, self-cleaning glass coating with a structure that mimics that of the lotus leaf—and takes a page from the raspberry, too.

The coating, by researchers at the Chinese Academy of Sciences, imparts a “clear, slick, water-repellant surface” to glass and other transparent materials.

 Ralf Pfeifer/ Wikimedia Commons

 Ralf Pfeifer/ Wikimedia Commons

The lotus leaf’s superhydrophobic surfaces excel at repelling water and boast other “smart” self-cleaning, anti-glare, anti-icing, and anti-corrosion properties, scientists say.

The scientists say they were inspired by the leaf’s water-repellent and other properties. The coating also employs hollow silica nanoparticles that resemble raspberries, they said.

Tomorrow’s Materials

The coating holds potential for tomorrow’s materials, the team reports.

By “modifying low-surface-energy materials and creating surface textures on them, surfaces can be made to exhibit completely different wetting characteristics—either repelling or attracting moisture,” according to the American Institute of Physics (AIP), which published the research in Applied Physics Letters.

The research is described in “Transparent superhydrophobic/superhydrophilic coatings for self-cleaning and anti-fogging.” 

The article notes that superhydrophobic surfaces have demonstrated important self-cleaning, antireflection and anti-icing properties. Superhydrophilic surfaces, meanwhile, provide antireflection and anti-fog properties.

 Applied Physics Letters

 Applied Physics Letters

Two views (a and b) show the fogging differences between coated superhydrophilic glass and bare glass. The bottom row shows the fogging differences between (c) superhydrophobic glass and (d) bare glass.

“Recently,” the team notes, “there have been increasing interest in multifunctional transparent superhydrophobic or superhydrophilic films displaying antireflection or anti-fog, which can greatly extend their utility in the fields such as windshields, solar cell, and optical devices.”

‘Fog-Free Performance’

In the current experiments, the finished surfaces exhibited good anti-fogging and light-transmittance properties before and after chemical modification, the authors say.

The “results reveal that evaporation rate of the fog on superhydrophobic surfaces can be tremendously improved,” the team writes.

That could mean “clearer, fog-free performance” for windshields, windows, solar cells and panels, LEDs, TVs, tablets, and cell phone screens.

Such “smart coatings” are highly desirable, especially for solar cells and panels, which frequently lose up to 40% of their efficiency to dust and dirt buildup within a year of installation, the AIP said.

The next challenge for the scientists: move the smart surfaces from the lab to industry in a cost-efficient manner, the AIP said.

   

Tagged categories: Coatings technology; Glass coatings; Research; Self-cleaning coatings

Comment Join the Conversation:

Sign in to our community to add your comments.

Advertisements
 
Atlas Material Testing Technology
 
Helping You Put Your Products To The Test
 
  • Outdoor Accelerated Weathering
  • Laboratory Testing Services
  • Accelerated Weathering Instruments

  • www.atlas-mts.com
    atlas.info@ametek.com
 

 
A&I Coatings
 
Vitreflon – the hallmark of colour stable protective coatings
 
Vitreflon two pack fluoropolymer coatings display unsurpassed colour and gloss retention making Vitreflon the coating of choice for high value infrastructure and architecture. Contact us today to find out how Vitreflon can outperform on your next project. Vitreflon distributorships available.
 

 
Pratt & Lambert Paints
 
Trusted Performance with Proven Results
 
Pratt & Lambert’s finest, Accolade® Premium Paint & Primer, applies flawlessly with superb hide and long-lasting durability for great results, every time.
 

 
PPG Paints
 
PURE PERFORMANCE® Interior Latex Paint
 
PPG PAINTS™ Pure Performance interior latex paint delivers a durable finish. Its zero-VOC,* low-odor formula makes it ideal for schools, hotels, hospitals, office buildings, retail spaces, home residences and more. *Colorants added to this base paint may increase VOC level significantly depending on color choice.
 

 
CONSTRUCT (by CSI)
 
Free Expo Pass to CONSTRUCT 2017
 
CONSTRUCT is the only dedicated national trade show and educational conference for the commercial building teams that spec and source building products. CONSTRUCT links thousands of industry leaders to procure real-world, practical knowledge for building success.
 

 
RCI, Inc.
 
RCI Building Envelope Technology Symposium
 
November 13-14, 2017 | Orlando, Florida | Learn valuable design and repair insights from 20 leading design experts. RCI, Inc. is an AIA LU provider. Learn more.
 

 
 
 

Technology Publishing Co., 1501 Reedsdale Street, Suite 2008, Pittsburgh, PA 15233

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL webmaster@durabilityanddesign.com


The Technology Publishing Network

Durability + Design PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker

 

© Copyright 2012-2017, Technology Publishing Co., All rights reserved