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

 

D+D News

Main News Page


Researchers Create New Cooling Coating

Monday, October 1, 2018

More items for Coatings Technology

Comment | More

Columbia University researchers recently announced the development of a white polymer coating that reflects more than 96 percent of sunlight, offering a new solution for cooling demands in warm climates.

The coating, which is flexible, is produced in a dyeable, paint-like form, and can be used almost anywhere traditional paint can be applied.

Cooling Coating

To create the coating, the research team engineered a mixture that forces water to settle into small droplets; when those evaporate, the air holes left behind are what helps the coating reflect the sunlight so effectively.

The team—composed of assistant professor of materials science and engineering Yuan Yang; associate professor of applied physics Nanfang Yu; and Jyotirmoy Mandal, doctoral student and lead author of the study—based their research upon earlier work that demonstrated that simple plastics are excellent heat radiators, which can be used in passive daytime radiative cooling.

The team chose to use phase-inversion in their research because it seemed to be a simple solution—it creates air voids in polymers that also scatter light. In using this method, the pigments in white paint are replaced with air voids that reflect all waves of sunlight, ranging from UV to infrared.

“This simple but fundamental modification yields exceptional reflectance and emittance that equal or surpass those of state-of-the-art PDRC designs, but with a convenience that is almost paint-like,” said Mandal.

The first test run was completed in Phoenix, a city known for its oppressive heat. During the test, the coating was applied to a copper sheet monitored with sensors. After 30 minutes, the team found that the coating was six degrees cooler than the ambient temperature.

“The fact that cooling is achieved in both desert and tropical climates, without any thermal protection or shielding, demonstrates the utility of our design wherever cooling is required,” Yang said.

The team also created colored polymer coatings by adding dyes; these options have similar cooling capacities.

“Polymers are an amazingly diverse class of materials, and because this technique is generic, additional desirable properties can be conveniently integrated into our PDRC coatings, if suitable polymers are available,” Mandal said.

   

Tagged categories: Coating Materials; Coatings Technology; Polymers; Research and development; Solar reflectance

Comment Join the Conversation:

Sign in to our community to add your comments.

Advertisements
 
Keim Mineral Coatings
 
Mineral Silicate Paints + Stains Fuse to Concrete
 
• Forms permanent chemical bonds
• Becomes part of the concrete
• Will never peel
• Looks completely natural
 

 
Shield Industries, Inc
 
FireGuard® E-84 Intumescent Coating - Shield Industries, Inc
 
Trust the certified protection of the industry’s most innovative intumescent coating FireGuard® E-84 to provide you with the 1 and 2 hour fire ratings you need.
 

 
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
 

 
Dow Coating Materials
 
Need smooth, durable and appealing coatings?
 
Dow Corning® 52 Additive improves abrasion resistance & slip in:
• Waterborne paints, inks &
  coatings
• Wood coatings
• OPVs
• Exterior & interior paints
Samples available.
 

 
Novatek Corporation
 
Novatek Portable Air Filtration Systems
 
Air Scrubbers/Negative Air machines for restoration, abatement, dust & odor control, hazardous contaminant removal from job sites to clean rooms and hospitals. Portable, affordable!
 

 
 
 

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 2012-2018, Technology Publishing Co., All rights reserved