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DIY Supermaterial Could Save You From Heatstroke: Salt based PCMs (www.youtube.com)

submitted 5 months ago by RoboGroMo@slrpnk.net to c/technology@slrpnk.net

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A simple mix of two cheap salts, Sodium Sulfate and Table Salt (Sodium Chloride) dissolved in boiling water can create a really useful Phase Change Material that has a melting point of 18c (65f) which allows it to be recharged back into it's cooling state simply by putting it in a basement and can then be used as a cooling blanket, back rest, neck pillow, etc to help keep you cool in hot weather. Longer lasting and less energy intensive to charge than an ice-pack.

In the video he talks about the potential for using a similar higher temp PCM behind solar panels to reduce efficiency loss or damage from over heating. It could also be a really interesting thing to use for transporting heat from where it's unwanted to where it's needed.

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[–] anothercatgirl@lemmy.blahaj.zone 9 points 5 months ago* (last edited 5 months ago)

Energy wise, they last up to 60% as long as a block of ice in a plastic bag wrapped in a thin layer of foam so it doesn't frostbite you. The benefit is the ability to recharge them in the fridge or even in a cool place instead of the freezer.

also those hand warmers seem like they're bad because they're tiny not because their chemistry is flawed.