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Smart fabric heats up under the sun

uwaterloo.ca

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Re: Smart fabric heats up under the sun

#5
Don’t all fabrics already absorb IR and heat up?

This new fabric would need to be the outer layer of a garment to receive light, so no insulation and no layering. Most of the heat would not be warming you up. Seems kinda useless?

I would be more interested in a fabric that cools down under the sun.

Re: Smart fabric heats up under the sun

#6

Don’t all fabrics already absorb IR and heat up? This new fabric would need to be the outer layer of a garment to receive light, so no insulation and no layering. Most of the heat would not be warming you up. Seems kinda useless? I would be more interested in a fabric that cools down under the sun.

Do I have a treat for you https://youtu.be/G8YBV7GoF_s?feature=shared

Re: Smart fabric heats up under the sun

#7

Don’t all fabrics already absorb IR and heat up? This new fabric would need to be the outer layer of a garment to receive light, so no insulation and no layering. Most of the heat would not be warming you up. Seems kinda useless? I would be more interested in a fabric that cools down under the sun.

  Don’t all fabrics already absorb IR and heat up?
Yes, but the paper's abstract says this fabric heats up faster:

  Through the incorporation of a modest amount (as little as 0.5%) of photothermally active polyaniline (PANI) and polydopamine (PDA) nanoparticles, this fiber exhibits exceptional photothermal conversion performance compared to pure thermoplastic polyurethane (TPU) fiber. Notably, when exposed to 600 W m−2 irradiation for 600 s, the equilibrium temperature of the photo-thermochromic elastic fiber rises impressively from the ambient 20.0 °C to 53.5 °C.

Re: Smart fabric heats up under the sun

#8
Wear black non-glossy skin tight stuff all over and I can tell you it heats up darn fast to unbearable levels. Great for mountains and cold times though. This must be a smidge better and uses different colors so some evolution it seems.

Depends on price and tons of other aspects like long term durability and resistance to frequent washing to make it interesting for masses, I expect some major issues there

Re: Smart fabric heats up under the sun

#9

Don’t all fabrics already absorb IR and heat up? This new fabric would need to be the outer layer of a garment to receive light, so no insulation and no layering. Most of the heat would not be warming you up. Seems kinda useless? I would be more interested in a fabric that cools down under the sun.

Don’t all fabrics already absorb IR and heat up? Yes, but the paper's abstract says this fabric heats up faster: Through the incorporation of a modest amount (as little as 0.5%) of photothermally active polyaniline (PANI) and polydopamine (PDA) nanoparticles, this fiber exhibits exceptional photothermal conversion performance compared to pure thermoplastic polyurethane (TPU) fiber. Notably, when exposed to 600 W m−2…

So basically useless in winter above 60 degrees latitude, when and where it would be most needed: sun is up only a few hours per day, and only one or two of those hours get 100W per square meter on a clear day.
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