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Polymer Coating Cools Down Buildings

posted by martyb on Friday September 28 2018, @02:51PM   Printer-friendly
from the does-it-cool-up-in-Australia? dept.

Phoenix666 writes:

Polymer-Coated Buildings:

Researchers at Columbia Engineering have invented a high-performance exterior PDRC [passive daytime radiative cooling] polymer coating with nano-to-microscale air voids that acts as a spontaneous air cooler and can be fabricated, dyed, and applied like paint on rooftops, buildings, water tanks, vehicles, even spacecraft -- anything that can be painted. They used a solution-based phase-inversion technique that gives the polymer a porous foam-like structure. The air voids in the porous polymer scatter and reflect sunlight, due to the difference in the refractive index between the air voids and the surrounding polymer. The polymer turns white and thus avoids solar heating, while its intrinsic emittance causes it to efficiently lose heat to the sky.

Journal Reference:
J. Mandal, Y. Fu, A. Overvig, M. Jia, K. Sun, N. Shi, H. Zhou, X. Xiao, N. Yu, Y. Yang. Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling. Science, 2018; eaat9513 DOI: 10.1126/science.aat9513

The new desert home paint?

Original Submission

 
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  • (Score: 2, Touché) by Anonymous Coward on Friday September 28 2018, @05:43PM (3 children)

    by Anonymous Coward on Friday September 28 2018, @05:43PM (#741444)

    So let me make a wild guess here. Bill Spaulding is a golfing pal and/or you own a bunch of RPM stock.

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  • (Score: 2) by realDonaldTrump on Saturday September 29 2018, @03:18AM (2 children)

    by realDonaldTrump (6614) on Saturday September 29 2018, @03:18AM (#741665) Homepage Journal

    I didn't say Rust-Oleum. We love Rust-Oleum. But there are many brands. 3M, so many. We love ENVIRONMENTAL. And we've gotten many awards for environmental. More than anybody.