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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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Shane
Joined: 31 Oct 2005 Posts: 3467 Location: Doha. Is hot.
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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Nick
Joined: 02 Nov 2004 Posts: 34535 Location: Hereford
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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Posted: Tue Jul 13, 21 7:45 am Post subject: |
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Nick wrote: |
https://www.nature.com/articles/s41378-020-00197-z
Or use titanium dioxide, like self cleaning glass. |
interesting, it seems to have promise at proof of concept scale
having met Iraqi dust on various bits of surplus kit, that stuff is well sticky, ditto saharan stuff that drops out of africus winds now and again.
it does require water, although less than a mop and bucket.
iirc there are 2 issues, a contant ish build up and a major dustfall from regular dust storms.
if i understand it enough, i recon it might be good for some situations, my roof for example, where there is water and mixed muck depositing at a fairly low constant rate
i am not sure if it is practical for fettling after a major dustfall or if the droplet would still be liquid by the time it ended its run in the hot sun and breeze for regular maintenance cleaning
where does the muck go? can the water be recycled?
how long does it survive when it gets sandblasted?
ps fluorine is a useful element, but it does have some huge downsides as many of its compounds are long term legacy chemicals with nasty environmental and biological payloads
it has promise but a hoover on a rail or robotruck is tried and tested tech, it can be built to deal with a steady cleaning and "snowplough time" spec
due to the thermal issues, 0 to 40 C is an average sort of day, any system on rails has some mechanical issues, robotruck has quite a lot of merit as a cleaner, it can hide in storms and snooze if it is too hot, it only needs a reasonably smooth access path and it can empty itself and recharge at central points
much easier to program than a domestic cat hoverboard vac |
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Slim
Joined: 05 Mar 2006 Posts: 6609 Location: New England (In the US of A)
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Shane
Joined: 31 Oct 2005 Posts: 3467 Location: Doha. Is hot.
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Shane
Joined: 31 Oct 2005 Posts: 3467 Location: Doha. Is hot.
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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Shane
Joined: 31 Oct 2005 Posts: 3467 Location: Doha. Is hot.
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Ty Gwyn
Joined: 22 Sep 2010 Posts: 4610 Location: Lampeter
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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Shane
Joined: 31 Oct 2005 Posts: 3467 Location: Doha. Is hot.
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Shane
Joined: 31 Oct 2005 Posts: 3467 Location: Doha. Is hot.
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Posted: Thu Jul 15, 21 4:35 am Post subject: |
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dpack wrote: |
Shane wrote: |
dpack wrote: |
beasty stuff, oddly sticky when dry or wet
abrasive as well, which is an issue for any machinery involved |
Yep - exactly why I always clean the cars myself!
"Waterless wash, Sir?" is a recipe for paint removal by a thousand cuts. |
i am glad i am thinking of the right type of dust
a few observations based on " random samples from abroad"
it sticks more to some things than others, almost nowt in the ropes of helicopter nets, a black plastic water butt could hold remnants of the stuff for a couple of years in use under a spring in a temperate rain forest
some packaging not other stuff
clean metal may be immune, metal with any sort of coating maybe not(brass eyelets seemed very immune)
any sort of machine in those conditions needs as much consideration as what it has to do
electrostatic, physical, chemical and just being "difficult" all seem likely factors |
Another thing to bear in mind - if the dust is mixed with water and left to dry out again, it sets hard, a bit like a breakable form of concrete. Any solution that rinses it off needs to make sure it doesn't gather in pools anywhere sensitive - mixed with leaves, the slurry is very good at blocking small-bore drain pipes when it sets, for example. |
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