Durability + Design
 
About  |  Subscribe  |  Advertise  |  Connect 
Follow us on Twitter Like us on Facebook

 

Get your FREE e-resource: The Technology of Coatings in High-Rise Structures

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.

PPG Protective and Marine Coatings Group
Industrial strength performance in ONE can.

Now get the durability and protection of two components in one can: Amercoat® ONE, PSX® ONE and Sigmadur ONE.


Graco Inc.
Eco-Friendly Surface Prep

• Blast with 92% less dust
• Use less media
• Less containment & disposal costs
Graco® EcoQuip® Vapor Abrasive® Blast Equipment Learn more


VP Marketing LLC
Concrete Coating & Seamless Flooring Advisor

• Selecting the Right System
• Marketing Valued Products
• Preventing Problems
Coatings*Mortars*Terrazzo
tmurphy@vpmarketingllc.com


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


Seymour Midwest
Coating Application Tools & Supplies

Visit our “Where to Buy” site to find a local paint or tool supplier near you. Click here for a chance to win $500 of Tools & Supplies. 1(844)739-6687 Sales@SeymourMidwest.com


PPG Paints
Because Every Job Matters®

Unsurpassed product line-up, strong spec position and expert service all backed by the world leader in paint and coatings. Available at more than 2,400 locations.


KTA-Tator, Inc. - Corporate Office
KTA Inspection Services

Determine Specification Compliance:
• Surface Preparation
• Moisture Content
• Paint Materials & Application
• Aesthetics
Contact: Kevin Brown,
336-386-4000


AIA Convention

 
 
 

Technology Publishing Co., 2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951

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 2012-2016, Technology Publishing Co., All rights reserved