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In this video I start exploring a method to make radiative cooling clothing

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Experiments to Make Self-Cooling Fabric

Check out my sponsor Brilliant, free for 30 days (and get 20% off a premium subscription!) by using this link: https://brilliant.org/nighthawk In this video we follow a paper that describes achieving a daytime radiative cooling effect on cotton fabric through the growth of CaCO3 microspheres directly onto the fibers. The paper can be found here: https://doi.org/10.1016/j.compositesb.2022.109988 My previous video in this radiative cooling series: https://youtu.be/KDRnEm-B3AI?si=T7ltrmPqWw4WJJ3y Thank you so much to those of you who support this channel on Patreon! Your support really helps give me confidence to spend my time researching projects that are of value for more than just video views. Shoutout to my top patrons: Eugene Pakhomov, Peter Gordon, Evan Hughes, Teague Lasser, Matthias S., Michel Pastor, PabloXIII, Parker Jones, Simone Chiesi, Steve C, Yanko Yankulov, Walter Montalvo, Carl Katzenberger, Damián Arrillaga, Dan L, Edward Unthank, Gusbear, Jon Hartmann, Kejie YU, Kirk Werklund, Lisa L, Mark Roth, PabloXIII, Santiago Perez, Steve C, Thibaud Peverelli, Tristan Tonks, WilSkarlet, Yanko Yankulov, and Matthew. https://www.patreon.com/NightHawkProjects Thanks everyone for watching!

Comments

PeteyPak

This is your guy, if you can get a follow-up: https://profiles.uts.edu.au/Geoff.Smith I got really interested in a presentation he did circa 2014 about exactly what you're working on. I've been thinking about it for years and I'm really glad you're looking into it - I've been dreaming of Skycool shadecloths strung above streets letting cool air filter down (I'm living/working in the tropics at the moment!). He had his Skycool coatings in dark brown and green in visible light - they didn't even have to look white! And his nano particles even worked in optically-transparent glass. It was just such a great idea/technology I've been telling people about it ever since.

PeteyPak

I don't know how/if his Skycool (http://www.skycool.com.au/uts.htm - very old crappy page - student-created I think) is related to the American company of the same name at all. I emailed the US Skycool people some years ago asking about the nanotech aspects of their coatings, and they replied, but they did none of the sexy two-photon excitation fluorescence Geoff talked about.

Alistair Campbell

Thank you! I really appreciate the long form and very comprehensive projects and resulting videos.