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Liquid Armor

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Published on Jan 9, 2009

This amazing shear thickening fluid is the secret of stab-proof clothing.

As many viewers have pointed out in the comment section, this is a non-newtonian fluid. It works very much like Oobleck, cornstarch in water. See http://en.wikipedia.org/wiki/Non-Newt... for a long list of mixtures that have similar properties at various strength. In this military grade non-Newtonian fluid, cornstarch is replaced with silica, water is replaced with polyethylene glycol. Watch at time mark 4:43 closely and notice that the free hanging bottle did not drop. It means that the liquid reacts to force as low as Earth's gravity. He had to hold the bottle and free the rod with less force than gravity.

The video does not tell how to keep this solution in liquid form over time. It will probably lose its shielding property when the liquid dry out.

Also watch http://youtu.be/SBXQ-6uI8GY for more examples of non-newtonian fluids.

From an old episode of Science Channel's "Cool Stuff" TV show. Discovery Communications own the copyright of this clip from the Cool Stuff TV show. Show your support by subscribing to Discover Channel, Science Channel and TLC. They are my favorite channels and my reason to subscribe to cable TV.

Please subscribe to http://www.youtube.com/user/ScienceCh...

Comments • 2,538

Michael Fuckface
What happens when you try and move your arm too fast and your sleeve turns rock solid lol
View all 6 replies
XΣRXΣS
Yeah great elbow armor guys good job
Rip My Nipples
+Travis Johnston you're probably fucking retarded...
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Ryan Wigglesworth
but will it blend?
Bill Dreaden
Yes, it is completely pliable when not under force.
Inge Bolme
+Mbeluba Would like to try though.
greenspiraldragon
what if you stab it slowly?
View all 10 replies
XΣRXΣS
kinky.
Tantan tantan
+greenspiraldragon I watched it in normal and slow motion, same result
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furyp100
The fluid is basically Corn Syrup and water
View all 7 replies
kent gladden
+Sean Rhoades The silica is a macromolecular covalent compound. It shares this characteristic w/ Silicon Carbide, which actually is significantly better than Silicon Dioxide in this application. As the sheer thickening effects localized compression, the density increase is harder (MOH) w/ Silicon Carbide.
Shirish Jadav
+furyp100 I knew it as soon as I saw the label ... its just behaves in that way... :)
Hide replies
John Paul Gerard cutillar
Hmm. I should try to rub my sperm all over my clothes
carl tong
i thought it was semen too the first i saw
B N
U mean with Kevlar
pingwen hung
people will say this and it's hidden in the comment section , Is that semen ? x'D
View all 5 replies
UnkindScourge
I was secretly thinking it looks like cum XD
Freddie Bell
Read the description, even the force of gravity is enough to trigger it...
Hide replies
White Rhino
I wonder how much money is spent annually to protect humans that have to interact with africanized throwbacks.
View all 6 replies
James Spignola
Hayden Follett You are delusional.
z1522
You apparently have decided criminals look black, or in your racist, white nationalist jargon/joke, "Africanized", referencing the aggressive strains of bees which bred with the domesticated, more docile apis mellifera. Criminals look like everybody; every episode of 48Hrs shows generically bland white 'Christian' middle Americans who end up being John Wayne Gacys. Drunk, high, heroin addicts or methheads are mainstream small town U.S.A's biggest new criminal blight right now. That's who I would protect myself from.
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Dyllan Jensen
Basically Cornstarch and water, but more intense.
your average plumbus
and glue
lasheron
the shirt and the knife would be in you
View all 4 replies
William Murphy
Simple test and I think you will understand quite well. Let someone stab you as hard as they can with a completely flat unshaped/unsharpened pencil and then take the same blow from a perfectly sharp pencil... With small weapons that have very little kinetic energy the life threatening injury comes from the puncture wound itself. The material is several millimeters thick when you surround that entire weapon in several extra millimeters all the way around the weapon it becomes more than the difference between a perfectly sharpened pencil and a flat ended wooden stick!!! Stop being idiots!!! Anyways this stuff was showed to the Army a very long time ago... there are obviously major issues with production, reliability, temperature control, gravity or longevity of some kind that keep this in a state of development... my guess is it stays there well past the day some idiots thought that we would have magnetically computer controlled liquid armor which 15 years ago was expected in 20-25 years.
erzan
+Griffin Eslinger It's a choice between being stabbed or bruised, I'm picking bruised.
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ak15 ar47
So if you stab them just go slow problem solved 
View all 13 replies
ak15 ar47
Maybe we should get to the real problem why do these ppl have knifes at all
ak15 ar47
+Valoro85 if you are talking about a hunting knife ok. But how many prisoners have a knife like that? 
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