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Spray-On Liquid Glass
bLanark writes with news of a new substance that can be sprayed on for a durable, easy-to-clean film on almost any substance, hard or soft. The liquid glass is essentially pure silicon dioxide, and it goes on in a layer 15 to 30 atoms thick. It is breathable and flexible, but waterproof and resistant to bacterial growth. The patent is held by a German company, Nanopool, which is in discussion with many parties about a wide range of uses: keeping public spaces sanitary, keeping restaurants clean, and keeping cars or trains clean. "The spray forms a water-resistant layer, meaning it can be cleaned using only water. Trials by food-processing companies showed that sterile surfaces covered with a film of liquid glass were equally clean after a rinse with hot water as after their usual treatment with strong bleach."
Probably not... unless you don't mind having having only 15 to 30 atoms between you and the outside world.
Urban legend. Glass is an amorphous solid.
If it's that thing of a layer, wont it be prone to breaking off and becoming airborne? Sounds like silicosis-fun-times to me.
Commando baby, it's the only way.
Wikipedia disagrees.
In particular, the myth that glass in older houses is thicker at the bottom because it flowed definitely seems to be just that -- a myth:
Apparently, the parent's parent is a _bad_ chemist.
The Blaster Master Fighting for Truth, Justice, and Evil Pie since 1979
Inhaling finely divided crystalline silica dust in very small quantities (OSHA allows 0.1 mg/m3) over time can lead to silicosis, bronchitis or (much more rarely) cancer, as the dust becomes lodged in the lungs and continuously irritates them, reducing lung capacities (silica does not dissolve over time). http://en.wikipedia.org/wiki/Silicon_dioxide
This guy doesn't entirely agree with you:
http://www.math.ucr.edu/home/baez/physics/General/Glass/glass.html
I quote:
<quote>In terms of molecular dynamics and thermodynamics it is possible to justify various different views that it is a highly viscous liquid, an amorphous solid, or simply that glass is another state of matter that is neither liquid nor solid. The difference is semantic.</quote>
No kitty, this is my pot pie!
So I'm all for moderation not being aligned with agreement, but I'm not sure how a factually incorrect post can be "Informative"...
Oh, wait, I get it... the post informs us in that now we know chemists can fall for myths just like everyone else.
(The reason old windows are thicker at the bottom is that they were built that way, for structural reasons.)
Can I now avoid costly windshield replacements by simply spraying this stuff on my windshield after a ding storm, or crack?
The problem with having a crack isn't the divot where the crack started, it's the leading end of the crack. When you apply stress to a material that has a crack, the force per unit area at the tip of the crack approaches infinity, so what you have to do to keep the crack from spreading is increase its area. That's why windshield repair people drill holes at the ends of the cracks and then fill them.
Even if your intent is just to fill the much smaller divots in the glass, 30 molecules thick isn't going to make much difference. What you need is a material that has roughly the same index of refraction as the glass, that you can spread over the divots like makeup.
Nostalgia's not what it used to be.
I wonder if this could help make graffiti removal easier. Spray this on a clean road sign, and then just wash it with water if it gets tagged. Sure could help new drivers in Los Angeles.
Forget your windshield, think YOUR ENTIRE CAR!
No more clear coats, no more waxing, no more "rubberized under coating". If it is cheap, and light enough, you could coat every body panel and frame member with the stuff, virtually guarantying a rust proof existence.
-Rick
"Most people in the U.S. wouldn't know they live in a tyrannical state if it walked up and grabbed their junk." - MyFirs
Anybody else notice that the article has essentially no information on what the stuff is? One thing that it isn't is "we extract molecules of SiO2, and then we add the molecules to water or ethanol," which is what the article tries to imply-- you can't just "add" molecules of silicon dioxide to water, nor to alcohol. So, just exactly what is it?
The actual press release from which this article seem to have been drawn is here.
http://www.geoffreylandis.com
I call it "Can o' Glass". Kids love glass, and kids love sprayin' stuff. We just give the kids what they want.
Part of the reason for this is that water tends to act almost like a "catalyst", encouraging cracks in glass to spread much more rapidly. According to an article in Scientific American, water causes glass to crack more easily because when a water molecule enters the crack, a reaction occurs in which a silicon-oxygen bond at the crack and an oxygen-hydrogen bond in the water are cleaved, creating two hydroxyl groups attached to silicon. As a result, the length of the crack grows by the size of one bond rupture. The water reaction reduces the energy necessary to break the silicon-oxygen bonds, thus the crack grows faster.
Theoretically, any strong material that will fill the crack and prevent moisture from entering should stop the cracking process. I don't see why a film of silicon dioxide would not work as well as resin.
we pour a gallon of that crud down the sink to kill 16 germs. not that a strong base like bleach is great for mother earth either.
Uh... OK.
So, first of all, silicon dioxide (the subject of the article) is soluble in strong bases. So it won't take long for your "strong base" to dissolve this stuff away. Or any strong base. Heck bird poop would probably suffice.
Secondly, bleach is primarily an oxidizer, secondarily it is somewhat basic but not impressively so. Perhaps you're thinking of some other strongly basic solution you pour down the drain, like, maybe lye based drain cleaner?
Thirdly as far as mother earth vs sodium hypochlorite, its ridiculously unstable and decomposes away before it even hits the sewage treatment plant. I suppose that by Environmentalist Religion "original sin" doctrine it is bad, in that everything any human does is always inherently bad. But compared to most things poured down drains, bleach is rather harmless. You can drink it when highly diluted as a water purifier.
It "sounds good", but it indicates a lot of weird ideas about basic chemistry (basic, get that pun?)
"Science flies us to the moon. Religion flies us into buildings." - Victor Stenger
Bleach is the nuke that people who are serious about killing bacteria use to clean their counters with. Antibacterial cleaners are the things the amateurs at home use.
If you can satisfy the pros that they don't need to use bleach on their counters then the only remaining reason for anyone to use an antibacterial cleaner on his counter at home is superstition.
Neither structural or aesthetic; glassblowers made the window panes by spinning the glass into large circles which were then cut. The glass circles were thinner towards the outer edge and installed thicker-side down for stability. http://en.wikipedia.org/wiki/Glass#Behavior_of_antique_glass
When did the future switch from being a promise to a threat? -C. Palahniuk
Actually, chlorine bleach (NaOCl - sodium hypochlorite) breaks down to NaCl (salt) and H2O (water), and O2 (Oxygen).
As far as industrial cleaners go, it's pretty much as good for the environment as you're going to get.
I'm curious about the strength of such a coating; there doesn't not appear to be any suggestion that the glass is bonded to the surface by anything stronger than van der Waals forces.
If the short-chains bond to each other, some of them might bond to the surface (if its structure is appropriate).
Even if not, unless the surface is mirror-smooth it will have irregularities. A liquid that cross-links into a solid will wrap such irregularities and form a mechanical interference bond - like a surface wrapped under a rivet, a mushroom-shaped extension into a void, or a root into a crack.
Van der Walls forces are not trivial - especially between form-fitted irregularly-shaped solids. And if the "glass" and its substrate have any charge asymmetry the setting glass will also tend to settle into place with opposite charges nearby, forming something like a hydrogen bond.
This might stick on to many surfaces very well.
Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
Actually, "play sand" is still almost entirely silicon dioxide, just like "regular sand."
The only difference is that the play sand has been washed and screened so that it has less dust and a more uniform grain size. The fact is, "toxic" silicon dioxide is all around us, and we all breathe some amount of it in every single day. Silicosis only becomes an issue for people that breathe in large amounts of it on a regular basis - i.e. people who work 40+ hours a week in fine-dust-generating industries. If the silicon dioxide found in "regular sand" was truly a health hazard, then every beach in California would be outlawed (or at least coated in warning stickers) telling you to keep away. Hasn't ever happened, and never will, since casual exposure from playing in sand is not a silicosis hazard in any way.
Another thing to consider is that given the typical chemical makeup of rocks and sand is that if it were even possible to remove all the "harmful" SiO2 from sand all you'd be left with was a fine dust of metals and trace elements which would be harmful if played in.
the concept of spray-on glass is mind-boggling
The concept of spray-on breasts is mind-boggling. The concept of spray-on glass is merely interesting.