EEVblog Electronics Community Forum
General => General Technical Chat => Topic started by: RoGeorge on December 23, 2018, 10:44:34 pm
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Not fake:
https://www.youtube.com/watch?v=dT1dSs988cY (https://www.youtube.com/watch?v=dT1dSs988cY)
https://www.youtube.com/watch?v=aqR4_UoBIzY (https://www.youtube.com/watch?v=aqR4_UoBIzY)
Full BBC documentary about the story of the original Starlite:
https://www.youtube.com/watch?v=NzIjkvRI7To&list=PL2KEtU5wGx-F9mvBeJKT5TRLl2aWWmPdh (https://www.youtube.com/watch?v=NzIjkvRI7To&list=PL2KEtU5wGx-F9mvBeJKT5TRLl2aWWmPdh)
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So it's self raising bread dough basically. Baking soda, some carbon based material and something to hold it together. Could be quite useful for projects.
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Interesting video. The purported Starlite formula was a combination of 20+ substances which were nearly all organic and supposedly edible.
I remember Starlite on TV way back. The inventor wanted somebody to pay megabucks to get partial ownership of the formula but refused to allow anybody to do thorough testing. It isn't too surprising that nobody took him up on his offer. One of the theories why he only allowed basic testing under close supervision was that it wasn't a stable substance and would degrade rapidly which would limit actual uses of it. Only way you'd find that out was to pay up but then its far too late.
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Looks like what's essentially a basic ablative shield.
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There is an additional component though, the dough puff up when heated, creating a foam, which turns into carbon foam when exposed to heat. The carbon foam works as an ablative shield.
That makes me wonder. In the video he says it would be better to let it dry first, since the moisture will conduct more heat than necessary. However, if it was dry would the bakingsoda still be able to create a foam?
AvE has made some carbon foam in the past:
https://www.youtube.com/watch?v=Wex_yKfrTo4 (https://www.youtube.com/watch?v=Wex_yKfrTo4)
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uh yea did you never eat at macdonalds before?
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https://en.wikipedia.org/wiki/Aerogel
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Yes, baking soda releases CO2 when heated. There are other materials that release more gas on heating, but it's a pretty good one for "kitchen" supplies.
Tim
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Aerogel is cool but it's notoriously difficult (somewhat dangerous actually) to make yourself (consequently expensive), unlike bread, baking soda, etc.
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Codys lab's take on above Hawklite and not on original Starlite, but anyway.
https://www.youtube.com/watch?v=o9UGvnS0lAE (https://www.youtube.com/watch?v=o9UGvnS0lAE)
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It would be an interesting experiment to compare it to an industry standard fire proofing.
Take some Type-X drywall and some normal 1/2 inch drywall with an added 1/8" of hawklite and see how long it takes a bunsen burner to burn through both and how well they insulate until they burn through.
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heat a dry bowl of carbonate salt on a flame and it is very peculiar. If its really fine (flour +). Because its turning into gas, it has very low friction. Its rather bizzare. Milled copper carbonate works well for this demonstration, as it turns into black copper oxide. Color change and this super-low friction stuff going on. Its like a witches cauldron.
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It's called a fluidized bed, gas bubbling up through a fine granular substance. It's as industrially useful as it is cool-looking!
Tim
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Oh, that should work for electronics PCB, too!
http://www.seattlerobotics.org/encoder/199804/breadbrd.html (http://www.seattlerobotics.org/encoder/199804/breadbrd.html)
:)
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It's called a fluidized bed, gas bubbling up through a fine granular substance. It's as industrially useful as it is cool-looking!
Tim
Such as electrostatic powder coating. Its surprising how expensive fire proofing paint are.
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Hawklite crucible filled with termite:
https://www.youtube.com/watch?v=Qtm_xOtw_r0 (https://www.youtube.com/watch?v=Qtm_xOtw_r0)