Thanks for sending us the STF to experiment! We'll have to try some other advanced chemistry projects with you in the future! That tank armor sounds fascinating...
According to a paper I read, 12nm is the ideal size for the silica. PEG to silica should be a 60:40 ratio and the PEG 400 benefits from a 5% addition of PEG 10,000 (possibly a higher % would be even better but studies had not been done at the time I was researching. The graph of results improved with every % addition of PEG 10,000 and the curve showed no sign of flattening, but the study stopped at 5%) and the whole mixture (including alcohol) should be sonicated for even distribution of the silica through the PEG The alcohol needs to be thoroughly evaporated off the aramid/kevlar/whatever so I would think baking it at 85c would be the way to go.
@@thethoughtemporium I'm sorry, I don't THINK I do any more, this was just for a hobby project. It might be on my old hard-drive. I will look and if I find the folder i'll find a way to get them to you (2 separate papers actually, one about nano-particle size, the other about adding PEG 10,000) I would note, that the 12nm size might be specific, for example it might be LESS good at energy absorption but also allow for a higher density of Silica to PEG, I'm afraid I can't remember the specifics.
@@thethoughtemporium I read a paper that said .25 micron fumed silica. it also attributed the hold to micro vacuums made when the liquid was too thick to fill in the gaps fast enough.
The best protection inserts for motorcycle equipment are made from materials with the same property, but more «solid» in free state, which looks like soft rubber (and doesn't restrict movement much) but becomes hard on impact and distributes impact energy on larger area.
Works great, too. When showing off my D3O pads to people, I demonstrate by putting one over my hand & hitting it with a hammer. The reactions are always priceless.
@@melody3741 Try to have hard shell around your knee or elbow joint. It is possible, but very inconvenient for commuting, for example. For hard core sport like enduro or or motorcross - sure, double articulated, separate protection. For touring or commuting? Possible, but too much and very inconvenient.
@@Adoffka What do you mean by "stopping power"? The kinetic energy of the bullet increases linearly with mass but exponentially with velocity. A regular 9mm round is generally on par with a .45 ACP in terms of force delivered even though the round is smaller. A 9mm +P+ round would blow the 45 ACP out of the water
@@Adoffka the average .45 acp produces between 350-500 ft⋅lbf at the muzzle, the average 9mm is virtually the same. to compare, a 55 gr. (that is 1/3-1/4th the weight of most 45 acp) 5.56 (the round used in the AR 15 and by militaries worldwide) produces well over 1000 ft⋅lbf out of anything with a 16 inch or longer barrel
@@sergey_is_sergey There actually is some merit to what people call "stopping power". It's about energy transfer to the target. A heavier projectile at a lower velocity will tend to push the target while a lighter projectile at a higher velocity will tend to penetrate the target. Of course, the other aspect of this is projectile design and material which also has a major impact on effectiveness against different targets. Few firearms are made anymore for standard .45 ACP and generally are at least rated for +P, which significantly outperforms 9x19mm +P+ at 803 J instead of 679 J. Not to mention .45 Super which has 941 J of energy in the same case dimensions. And if you're willing to accept slightly different case dimensions from regular .45 ACP at 1/16" longer case but same OAL, .460 Rowland has 2280 J, outperforming intermediate rifle cartridges like 5.56 NATO and having similar performance to 6.8mm Remington SPC, a cartridge in between that of an intermediate rifle round and a full power rifle cartridge such as 7.62 NATO.
The interesting thing to look at would not be penetration, but damage - getting shot wearing soft armor may not result in bullet penetration, but it can easily bruise and crack ribs. You won’t see that find of improvment in the samples you were sent though. If you wanted to measure this, a force sensitive resistor grid with peak hold will give you a great idea of how (and if) the shear thickening fluid spread out the force appreciably.
Ya but if you could somehow layer a thin layer of soft armor over a thin plate of rigid armor, then youd having something very little and very resilient
@Brent-jj6qi we dont watch these videos for moderate and boring results. If it cant improve on very basic body armor then it's far from what you could consider a success
Such a cool idea. The ooblek was one of those first experiments I did in chemistry as a child and I still think it’s one of the coolest things ever. Never knew WHY it acted that way before. Thanks for explaining!
To put it simply, sedimentation/creaming velocity (for particles denser/less dense than the solvent respectively) are counter-balanced by Brownian motion (the tendency of any particle to “disperse evenly” (imagine e.g. color mixing into water)). Below a certain threshold of about 1 micrometer in diameter, a sedimentation equilibrium can be reached where sedimentation is perfectly offset by Brownian motion, yielding a colloidal suspension.
English - Latin/Greek Shear thickening - dilatant/rheopectic. Shear thinning - pseudoplastic/thixotropic. Thanks for not insisting on the Latin or Greek! Example of thixotropism - "Shake and shake the ketchup bottle. First none'll come, and then a lot'll."
it might be significant to mention that 45 acp definitely has a kick, it is relitively slow compared to most bullets and has more of a “blunt force” sort of impact rather than “piercing”. its a larger bullet going at a (relitively) slower rate compared to something like a 9mm. so its good against soft targets, but tends to be easier to stop as well with protection.
I wondered what it would take to make a suit like that work in real life, but I figured it would have to integrate some electro or magneto rheological fluids.
Yah, I was wondering about that. If you integrated some kind of piezoelectric material could the impact provide the necessary electric current to activate the material?
HOLD UP! Are you making steel foam in a microwave? Dude you cannot be just casually hinting at making steel foam in a microwave and not tell me how to do it.
Hey, on your video about making synthetic opals you mentioned that there are russian research papers about the subject but they are almost never translated. If you need somebody that can do i think i can help. It would be pleasure to help with something like that
to keep it functional you have to use a liquid, as the glue prevents the compressive stacking. to do that in a vest you basicly have to make the vest out of pockets like a down jacket, so bottoming out is confined to each pocket, and make two offset layers so the seams are not weakpoints. or you use this non-newtonian rubber mixture thats used for some sports protective gear as a glue for the particles.
I played around with infused "truck bed liner plastic" in between ballistic nylon about 1/4 inch. When tested within a few days of make; results were not super. Happened across the samples months later and they were much more harder, have yet to test them--easy to make. My thought is to have two plates with the first deforming the bullet and second plate stopping it. Possible poor mans armor.
I have a less bullet stopping application. Think more of mitigating a hard punch, instead of a bullet. I wonder if PEG + corn starch + linen fabric would work as a replacement for 16g steel. I guess I'll be testing something of my own soon. While the opal looks like a lot of fun to make, I'm not set up to even attempt that here.
would shear THINNING be better at say, dampening a fall than regular viscosity water? since it would be thinner while you were accelerating and then progressively harden?
The early uses (10+ years ago now) of STF in armor were to improve stab resistance, rather than bullet resistance. Would be interesting to know if your initial attempt did that. If so, improving the stab resist without compromising bullet resist, is a pretty big win.
This is so cool. Didn't really consider that there could be non-newt liquids other than oobleck. And given that you brought it up, when do you think we can expect an update on the spider silk? Days, months, years?
I wrote a whole paper on how novel concepts could be used to improve body armor. Sheer stiffling gel (SSG)was one of the topics i covered as well as resin based self repairing technology. One group of researchers found that carbon black could be suspended in the SSG you could sense and measure impacts based on the stiffling effect changed measured resistance acros the panel. This could be used as a monitoring device for combat medics to automatically alert them if someone receives a shot or impact that causes sever bodily harm
What non Newtonian fluid is typically used in these applications? What else is suitable? What do you think about using a PV (iron on glue) or silicone (polysiloxane) matrix? Isn't the long foldable molecules of starch what makes it so ooblikly? Maybe a combo of immiscible polymers in a soup as substitute would work?
Corn starch is not tiny molecules, it is very long strings of saccharides called polysaccharides. it works because the strings get tangled and untangle slowly.
I had the exact same idea a few years back! Surprisingly, sitting on my ass didn't materialize a prototype that apparently never would've worked anyway. Thanks for helping out!
@@magentawool2556 I don't think so you get it, normal liquids become harder the more force you apply in a linear scale, ie if you apply 2x force, it will become 2x as hard and if you apply 3N force, it will become 3x as hard. But if you apply 2x force to oobleck, it will become 4x as hard and if you apply 3x force, it will become 9x as hard.
I think the issue here is the application of the fluid to the fabric. The liquid portion of the fluid may evaporate or be absorbed into the fabric. This means the suspended particles are no longer suspended, so they can't move around as they should. I think the approach is actually more similar to your demonstration of the sheer thickening effect on impact-it's in a pouch. It is contained and not absorbing into the fabric and can properly disperse the force. You may want to try pouches of the fluid sewn into a fabric. So it isn't as easily affected by gravity and can further spread out the force, perhaps the suspension could be in a gel of sorts. This would create what could be called a layer of gel. If the dispersion of the sheer thickening could be done more over time, it may offer more protection especially if it can be geared towards instantaneous impact forces in particular instead of just any force, though that's more in the realm of science fiction I should think. All in all though this would create viscosity throughout the gel layer any time you crash several kilometres from the sky after your battles with the Covenant. Seriously though ! Consider the idea. Good luck and happy hacking
One of the designs we came up with for civilian body armor used with this was to take recycled soccer balls and fill the Hex's with plastic bags sealed with the Ballistics liquid and slide them in vests/car doors/hollow building doors, ect to make them bulletproof or bullet resistant. This is the purple dynamic fluid we had in the lab.
*Not a sub machine gun! Not sure why people keep saying it as it will not make it true. It is obviously semiautomatic. 1 trigger pull for one shot. The chemistry is interesting and I thank you for that.
This channel is so much fun! Guys how about you clone yourself four times and then split for for additional projects so we can get 4 times the amount of cool chemistry videos?!
With the way you described the mechanics of it I don't think it could work as its own layer in a vest. If the shear thickening is a result of the particles jamming into each other, would a sheet of saturated fabric even have enough particles in front of a bullet to achieve the full effect? Even if it does, wouldn't the effectiveness max out around a thin sheet of opal?
It might be doable if you had packets of shear thickening fluid as a replacement for armor plates. You'd still have to contend with gravity pulling more fluid to the bottom of each packet though.
I wonder if graphene nano particles would work well suspended in a fluid. I’m also now wondering what properties of the fluid might improve ballistic armor. It seems it would need to be able to hold the particles stably without dissolving them and be easily expelled under pressure. I want to learn more about it now!
if you know your way around the bad neighbourhoods of the citadel, some krogan merchants will sell you SOTA non-newtonian armor, but they might not have your size
Their product clearly made for the businessman rather than the considerably more other people who are legitimately in danger, often because of that businessman who gets such protection.
Now I want to see this in a sandwiched brigandine made of dragon scale bullet resistant armor, overlapping 1 to 5 scales each layer. Yepp, hell of a lot heavier, probably, but the impact area could be huge, thus very manageable when hit by multiple projectiles.
Technically Ketchup isn't a pseudoplastic (shear thinning) fluid. It's a thixotropic system. The viscosity isn't just dependant on the force applied but also the timespan the force is applied. Whereas a constant sheer force applied to a pseudoplastic system will result in a constant viscosity, constant sheer force applied to a thixotropic system will result in a (time dependant !) decrease in viscosity. That's why shaking a bottle of ketchup will make it flow well for a short time, but only until the recovery time for the system is up
Any rheologists want to chime in on what else can be added to the solution? What if you add graphene powder or even very fine kevlar/silk fibers. You might have to add a yield-stress polymer/mineral to keep everything in suspension.
IMO: a better way to utilize this technology would be to take some of the kevlar that the hacksmith shot (the stuff that would stop the bullet on the first layer) and then sandwich somekind of high strength bag full of STF between a couple layers of that kevlar and the rest of the vest. The STF effect works best when there is a larger quantity of the STF (like in the hammer test) and the effect wont work very well if the STF is punctured so i think this would be a good solution to those problems.
If this were any other channel, I would have rolled my eyes and moved on, thinking it was clickbait. But I figured you'd be trying something a lot more interesting and sophisticated than oobleck. I was not disappointed. I didn't even know about sheer thinning fluids either, so I learned something interesting there, along with the bit of trivia about the military investigating this kind of body armour enhancement.
I hope I'm not mistaken but I think the fluid used in official stab vests is Polyethylene Glycol or Polyglycerin with silica particles. the particle and polymer sizes are a trade secret.
I was involved in similar testing years ago. It never resulted in being able to use less Kevlar but did show the potential to decrease back face deformation. The energy from a stopped bullet will still cause a lot of internal damage and leave you pretty messed up but if you can spread that force out over a wider area you can reduce the injuries quite a bit.
been thinking along the same lines, well done. i also have tested tank armour for the military and defeated the samples i was sent. I was asked to try civilian explosives first, which didn't go so well, but when i got tricky, i punched right through, with only 5-10 grams. Needless to say, the company making the armour, redesigned it.
The problem with this principle is the issue with viscosity; while it works in some applications for impact resistance, the viscosity of the compound cannot be applied over a large area due to pooling; therefore, it cannot be used in a vest to provide the level or protection to stop a bullet without rendering the wearer unable to be mobile. The solution would need to be applied across a cross-stitch patter to keep the solution from pooling, then each layer would need to be re-applied over several layers that overlap stitches; thereby, stacking the pockets of stitched pillows over each stitch later like stacking eggs on top of each other; eggs filling the gaps. but again, each layer must be leak proof, and several layers thick. In theory, it can be done, but I am not certain it would work without giving much thought on the design.
This makes me curious what the difference in penetration would be when shooting a tub of water big enough to catch a bullet, vs one filled wih this ooblek stuff.
Thanks for sending us the STF to experiment! We'll have to try some other advanced chemistry projects with you in the future! That tank armor sounds fascinating...
First
Best collab!
I wonder what your team could do with the plasma sputtering beam.
@@ryjunplayz8321 nice work
Imagine if STF was actually used for Tank armour
Fun fact: honey can be non-Newtonian depending on the flowers that went into it and a bunch of other parameters. Honey is really complicated.
this is quite insane
Is it possible to create oobleck from more stable materials?
@@serta5727 like hay or fodder? yeah you could try it
honey is also really tasty
Duh. I wear a 20 gallon clover honey bucket around hung on my chest. Plates.... too expensive
According to a paper I read, 12nm is the ideal size for the silica. PEG to silica should be a 60:40 ratio and the PEG 400 benefits from a 5% addition of PEG 10,000 (possibly a higher % would be even better but studies had not been done at the time I was researching. The graph of results improved with every % addition of PEG 10,000 and the curve showed no sign of flattening, but the study stopped at 5%) and the whole mixture (including alcohol) should be sonicated for even distribution of the silica through the PEG
The alcohol needs to be thoroughly evaporated off the aramid/kevlar/whatever so I would think baking it at 85c would be the way to go.
got a link to that paper?
@@thethoughtemporium I'm sorry, I don't THINK I do any more, this was just for a hobby project. It might be on my old hard-drive. I will look and if I find the folder i'll find a way to get them to you (2 separate papers actually, one about nano-particle size, the other about adding PEG 10,000)
I would note, that the 12nm size might be specific, for example it might be LESS good at energy absorption but also allow for a higher density of Silica to PEG, I'm afraid I can't remember the specifics.
@@thethoughtemporium I read a paper that said .25 micron fumed silica. it also attributed the hold to micro vacuums made when the liquid was too thick to fill in the gaps fast enough.
@Ms Moon Boo They literally posted the source. Try reading more and being an attention desperate e-personality less
@@msmoonboosource = the paper he just stated.
"Nano[particles] son! They harden in response to physical trauma! You can't hurt me!"
STANDING HEEEERE
I REALIIIIIZE
BRO IT FITS SO WELL
@@XxX_afterHours_XxX_You were just like me_
_Trying to make history_
Crysis reference?
@@ConandeBrodoMetal Gear Rising reference
The best protection inserts for motorcycle equipment are made from materials with the same property, but more «solid» in free state, which looks like soft rubber (and doesn't restrict movement much) but becomes hard on impact and distributes impact energy on larger area.
Works great, too. When showing off my D3O pads to people, I demonstrate by putting one over my hand & hitting it with a hammer. The reactions are always priceless.
They're not the best though. Not even close.
They are by far the most comfortable though..
@@Mentholox Best doesn't mean safest. Aerobags vests are safest (or not to ride a motorcycle at all).
This is ridiculous. If it turns hard the instant it hits am impact, THEN JUST BUILD IT HARD IN THE FIRST PLACE.
@@melody3741 Try to have hard shell around your knee or elbow joint. It is possible, but very inconvenient for commuting, for example. For hard core sport like enduro or or motorcross - sure, double articulated, separate protection. For touring or commuting? Possible, but too much and very inconvenient.
Also, .45 is not chosen for its ability to penetrate armor. It's the worst round for penetrating armor of what is in common usage.
Stopping power though. Imagine being hit in your best by sledgehammer
@@Adoffka What do you mean by "stopping power"? The kinetic energy of the bullet increases linearly with mass but exponentially with velocity. A regular 9mm round is generally on par with a .45 ACP in terms of force delivered even though the round is smaller. A 9mm +P+ round would blow the 45 ACP out of the water
@@Adoffka the average .45 acp produces between 350-500 ft⋅lbf at the muzzle, the average 9mm is virtually the same. to compare, a 55 gr. (that is 1/3-1/4th the weight of most 45 acp) 5.56 (the round used in the AR 15 and by militaries worldwide) produces well over 1000 ft⋅lbf out of anything with a 16 inch or longer barrel
@@sergey_is_sergey There actually is some merit to what people call "stopping power". It's about energy transfer to the target. A heavier projectile at a lower velocity will tend to push the target while a lighter projectile at a higher velocity will tend to penetrate the target. Of course, the other aspect of this is projectile design and material which also has a major impact on effectiveness against different targets. Few firearms are made anymore for standard .45 ACP and generally are at least rated for +P, which significantly outperforms 9x19mm +P+ at 803 J instead of 679 J. Not to mention .45 Super which has 941 J of energy in the same case dimensions. And if you're willing to accept slightly different case dimensions from regular .45 ACP at 1/16" longer case but same OAL, .460 Rowland has 2280 J, outperforming intermediate rifle cartridges like 5.56 NATO and having similar performance to 6.8mm Remington SPC, a cartridge in between that of an intermediate rifle round and a full power rifle cartridge such as 7.62 NATO.
@@sergey_is_sergeyarguably, stopping power is basically a thing, in regards to being shot while wearing body armor.
I had a good chuckle when you mentioned ruining glassware over a shot of a Dollarama hermetic jar. I love those things for all kinds of stuff.
Really nice scientific technique putting an empty bag in the control sample for the clay test. Absolutely perfect, these details usually matter a lot!
Is that sarcasm?
It's a bag of nothing man you can't go wrong with a bag of nothing cmon
This is great! I always hoped body armor could be more expensive. Try mixing the opal with HP printer ink
Mix in 3 ounces of powdered Unobtainium for best results.
@@rewrite1239 that really is a corundum
@@rewrite1239 Thank you for the multifaceted reply. It really did help me get clarity on this subject.
Opal with 'Joy' by Jean Patou should work well.
Next collab: Hacksmith, *insert an American ballistics channel*, and I made a tank
The interesting thing to look at would not be penetration, but damage - getting shot wearing soft armor may not result in bullet penetration, but it can easily bruise and crack ribs. You won’t see that find of improvment in the samples you were sent though.
If you wanted to measure this, a force sensitive resistor grid with peak hold will give you a great idea of how (and if) the shear thickening fluid spread out the force appreciably.
Or just some kind of weights
I mean, a bruise or cracked rib is at least a preferable alternative to like a punctured lung, although I guess a broken rib could lead to that
Ya but if you could somehow layer a thin layer of soft armor over a thin plate of rigid armor, then youd having something very little and very resilient
@Brent-jj6qi we dont watch these videos for moderate and boring results. If it cant improve on very basic body armor then it's far from what you could consider a success
Such a cool idea. The ooblek was one of those first experiments I did in chemistry as a child and I still think it’s one of the coolest things ever. Never knew WHY it acted that way before. Thanks for explaining!
How do you avoid the particles settling out of suspension when layering them like this?
To put it simply, sedimentation/creaming velocity (for particles denser/less dense than the solvent respectively) are counter-balanced by Brownian motion (the tendency of any particle to “disperse evenly” (imagine e.g. color mixing into water)). Below a certain threshold of about 1 micrometer in diameter, a sedimentation equilibrium can be reached where sedimentation is perfectly offset by Brownian motion, yielding a colloidal suspension.
@@waterunderthebridge7950 Nano-machines son.
@@joshyoung1440 Go back to stackoverflow with that non-answer.
make a polymer out of it, or something of the sorts of an ionic liquid, where one of the ion donors is a long chain hydrocarbon
@@trenvert123 LOL
English - Latin/Greek
Shear thickening - dilatant/rheopectic.
Shear thinning - pseudoplastic/thixotropic.
Thanks for not insisting on the Latin or Greek!
Example of thixotropism - "Shake and shake the ketchup bottle. First none'll come, and then a lot'll."
Nanoparticles, son!
it might be significant to mention that 45 acp definitely has a kick, it is relitively slow compared to most bullets and has more of a “blunt force” sort of impact rather than “piercing”. its a larger bullet going at a (relitively) slower rate compared to something like a 9mm. so its good against soft targets, but tends to be easier to stop as well with protection.
I wondered what it would take to make a suit like that work in real life, but I figured it would have to integrate some electro or magneto rheological fluids.
Yah, I was wondering about that. If you integrated some kind of piezoelectric material could the impact provide the necessary electric current to activate the material?
Hacksmith: Hey we're making a bulletproof vest wanna help?
This Guy: Yea I was just looking for a reason to make opal soup
HOLD UP! Are you making steel foam in a microwave? Dude you cannot be just casually hinting at making steel foam in a microwave and not tell me how to do it.
Nanomachines son!
"Nanoparticles, son! They harden in response to physical trauma."
Hey, on your video about making synthetic opals you mentioned that there are russian research papers about the subject but they are almost never translated. If you need somebody that can do i think i can help. It would be pleasure to help with something like that
Bump
This is the first video I’ve seen that actually explains how ooblek works, it’s super interesting how simple it really is
to keep it functional you have to use a liquid, as the glue prevents the compressive stacking. to do that in a vest you basicly have to make the vest out of pockets like a down jacket, so bottoming out is confined to each pocket, and make two offset layers so the seams are not weakpoints. or you use this non-newtonian rubber mixture thats used for some sports protective gear as a glue for the particles.
I love how professional these videos always are. Such obvious care and effort put into each of them, and such respect for the audience. It’s just nice
I played around with infused "truck bed liner plastic" in between ballistic nylon about 1/4 inch. When tested within a few days of make; results were not super. Happened across the samples months later and they were much more harder, have yet to test them--easy to make. My thought is to have two plates with the first deforming the bullet and second plate stopping it. Possible poor mans armor.
Yeeeahhhh the man uploaded!!!
3:16 nanomachines, son. They harden in response to physical trauma
It hardens in response to physical trauma?
Don't say it....don't say it....
NANOMACHINES SON
I have a less bullet stopping application. Think more of mitigating a hard punch, instead of a bullet. I wonder if PEG + corn starch + linen fabric would work as a replacement for 16g steel. I guess I'll be testing something of my own soon. While the opal looks like a lot of fun to make, I'm not set up to even attempt that here.
it's like in the movie "Idiocracy" only that instead of every scientist working on erection prolonging, it's all about mass shootings in the US
hmmm... maybe with thicker layer of shear-thickening fluid the force could be spread out more?
would shear THINNING be better at say, dampening a fall than regular viscosity water? since it would be thinner while you were accelerating and then progressively harden?
I don't think it would have a huge impact but definitely yes
The early uses (10+ years ago now) of STF in armor were to improve stab resistance, rather than bullet resistance. Would be interesting to know if your initial attempt did that. If so, improving the stab resist without compromising bullet resist, is a pretty big win.
3:10 nanomachines son
8:04 nice 👍👍👍👍
1:13 honey is actually shear-thinning fluid, not newtonian one.
This is so cool. Didn't really consider that there could be non-newt liquids other than oobleck.
And given that you brought it up, when do you think we can expect an update on the spider silk? Days, months, years?
shouldve used the nanomachines meme when you said nanoparticles at 3:16!
Cue the Dune body shields, but everyone looks like the Michelin man.
I'm fine with it.
I'm a bigger fan of the Lynch look of the shields anyway
I wrote a whole paper on how novel concepts could be used to improve body armor. Sheer stiffling gel (SSG)was one of the topics i covered as well as resin based self repairing technology. One group of researchers found that carbon black could be suspended in the SSG you could sense and measure impacts based on the stiffling effect changed measured resistance acros the panel. This could be used as a monitoring device for combat medics to automatically alert them if someone receives a shot or impact that causes sever bodily harm
so you wrote a paper but dont know the difference between sever and severe 🤔
@@MalcolmCooks perhaps english aint their first tongue or maybe its a basic typo
why does my milk taste weird
This guy: nanoparticles
Had this idea years ago. Glad to see it being tested😊
John Wick is truly ridiculous.
What non Newtonian fluid is typically used in these applications?
What else is suitable?
What do you think about using a PV (iron on glue) or silicone (polysiloxane) matrix?
Isn't the long foldable molecules of starch what makes it so ooblikly?
Maybe a combo of immiscible polymers in a soup as substitute would work?
Nanomachines son...
Corn starch is not tiny molecules, it is very long strings of saccharides called polysaccharides. it works because the strings get tangled and untangle slowly.
I literally showed multiple pictures of it. While it may be a polymer, this works because it formed into large roundish particles
I am so happy to see oobleck explained. I always said it was not a solution, it was a mixture but no one wanted to believe me.
I had the exact same idea a few years back! Surprisingly, sitting on my ass didn't materialize a prototype that apparently never would've worked anyway. Thanks for helping out!
Nanoparticles son! They harden in response to physical trauma
Chemistry, shiny things, goop, AND hitting things with a hammer? What is this, NileRed? Awesome work
0:09 EVERY LIQUID DOES THIS. WATER DOES THIS. THAT'S WHY IT HURTS TO FALL ON WATER.
No, every other liquid does this in a linear scale(Newtonian fluids), oobleck does this in an exponential scale.
You are so r/confidentallyincorrect.
@@c.jishnu378 whatever man, I know I'm correct so I don't care if you wanna be wrong.
@@magentawool2556 I don't think so you get it, normal liquids become harder the more force you apply in a linear scale, ie if you apply 2x force, it will become 2x as hard and if you apply 3N force, it will become 3x as hard. But if you apply 2x force to oobleck, it will become 4x as hard and if you apply 3x force, it will become 9x as hard.
Of course...
The answer is "Nanoparticles, son"
Try using an ap 50 mg tungsten round. It will punch right through.
Making armor out of shear thickening fluid is essentially the real world equivalent of the personal shields from dune.
I think the issue here is the application of the fluid to the fabric. The liquid portion of the fluid may evaporate or be absorbed into the fabric. This means the suspended particles are no longer suspended, so they can't move around as they should.
I think the approach is actually more similar to your demonstration of the sheer thickening effect on impact-it's in a pouch. It is contained and not absorbing into the fabric and can properly disperse the force. You may want to try pouches of the fluid sewn into a fabric. So it isn't as easily affected by gravity and can further spread out the force, perhaps the suspension could be in a gel of sorts. This would create what could be called a layer of gel. If the dispersion of the sheer thickening could be done more over time, it may offer more protection especially if it can be geared towards instantaneous impact forces in particular instead of just any force, though that's more in the realm of science fiction I should think.
All in all though this would create viscosity throughout the gel layer any time you crash several kilometres from the sky after your battles with the Covenant.
Seriously though ! Consider the idea. Good luck and happy hacking
The crossover I never knew I needed holy crap
One of the designs we came up with for civilian body armor used with this was to take recycled soccer balls and fill the Hex's with plastic bags sealed with the Ballistics liquid and slide them in vests/car doors/hollow building doors, ect to make them bulletproof or bullet resistant.
This is the purple dynamic fluid we had in the lab.
...and your channel will explode now.
Congrats 👍
Science has come so far on RUclips, "Light weight tank armor in a kitchen microwave"
*Not a sub machine gun! Not sure why people keep saying it as it will not make it true. It is obviously semiautomatic. 1 trigger pull for one shot. The chemistry is interesting and I thank you for that.
This channel is so much fun! Guys how about you clone yourself four times and then split for for additional projects so we can get 4 times the amount of cool chemistry videos?!
With the way you described the mechanics of it I don't think it could work as its own layer in a vest.
If the shear thickening is a result of the particles jamming into each other, would a sheet of saturated fabric even have enough particles in front of a bullet to achieve the full effect? Even if it does, wouldn't the effectiveness max out around a thin sheet of opal?
It might be doable if you had packets of shear thickening fluid as a replacement for armor plates. You'd still have to contend with gravity pulling more fluid to the bottom of each packet though.
There's also the issue of it being heavier than three bathroom tiles epoxied together, which likely provide simar amounts of resistance
I wonder if graphene nano particles would work well suspended in a fluid. I’m also now wondering what properties of the fluid might improve ballistic armor. It seems it would need to be able to hold the particles stably without dissolving them and be easily expelled under pressure. I want to learn more about it now!
if you know your way around the bad neighbourhoods of the citadel, some krogan merchants will sell you SOTA non-newtonian armor, but they might not have your size
Their product clearly made for the businessman rather than the considerably more other people who are legitimately in danger, often because of that businessman who gets such protection.
i love your voice so much, its been months since i last watched one of your videos and i still remembered it perfectly
I love how you just casually mention you're working on microwaveable tank armor, that sums up the channel so well XD
3:16 "Nanoparticles, son! They harden in response to physical trauma!"
Didn't know Metal Gear Rising is so true to real life.
Now I want to see this in a sandwiched brigandine made of dragon scale bullet resistant armor, overlapping 1 to 5 scales each layer. Yepp, hell of a lot heavier, probably, but the impact area could be huge, thus very manageable when hit by multiple projectiles.
Standing here, I realize.
Great to see you silk reactor project is still active !
I shall never lose water balloon fights again.
I'm so excited seeing all these little glimpses of your upcoming projects.
So stoked you're back to making videos!
Imagine a suit made from the spidersilk that's got the opal sheer fluid treated under armour
It is a good year when Thought Emporium posts a video! Looking forward to your next video in a year or two :P
Experimenting with this as a child . Who thought this would be made. Awesome to see an idea I had come to life . Thanks 🙏
This channel is nile red with a hint of mad scientist and I love it!
Technically Ketchup isn't a pseudoplastic (shear thinning) fluid. It's a thixotropic system. The viscosity isn't just dependant on the force applied but also the timespan the force is applied. Whereas a constant sheer force applied to a pseudoplastic system will result in a constant viscosity, constant sheer force applied to a thixotropic system will result in a (time dependant !) decrease in viscosity. That's why shaking a bottle of ketchup will make it flow well for a short time, but only until the recovery time for the system is up
"NANOMACHINES SON"
Any rheologists want to chime in on what else can be added to the solution? What if you add graphene powder or even very fine kevlar/silk fibers. You might have to add a yield-stress polymer/mineral to keep everything in suspension.
IMO: a better way to utilize this technology would be to take some of the kevlar that the hacksmith shot (the stuff that would stop the bullet on the first layer) and then sandwich somekind of high strength bag full of STF between a couple layers of that kevlar and the rest of the vest.
The STF effect works best when there is a larger quantity of the STF (like in the hammer test) and the effect wont work very well if the STF is punctured so i think this would be a good solution to those problems.
If this were any other channel, I would have rolled my eyes and moved on, thinking it was clickbait. But I figured you'd be trying something a lot more interesting and sophisticated than oobleck. I was not disappointed. I didn't even know about sheer thinning fluids either, so I learned something interesting there, along with the bit of trivia about the military investigating this kind of body armour enhancement.
I hope I'm not mistaken but I think the fluid used in official stab vests is Polyethylene Glycol or Polyglycerin with silica particles.
the particle and polymer sizes are a trade secret.
this was a pretty cool collab
I was involved in similar testing years ago. It never resulted in being able to use less Kevlar but did show the potential to decrease back face deformation. The energy from a stopped bullet will still cause a lot of internal damage and leave you pretty messed up but if you can spread that force out over a wider area you can reduce the injuries quite a bit.
been thinking along the same lines, well done. i also have tested tank armour for the military and defeated the samples i was sent. I was asked to try civilian explosives first, which didn't go so well, but when i got tricky, i punched right through, with only 5-10 grams. Needless to say, the company making the armour, redesigned it.
Please do more videos on growing gemstones
That formal suit with the protection in it looks like something Bruce Wayne would wear.
Finally after that Hacksmith video I knew this was coming but couldn't wait!
NANOPARTICLES, SON. THEY HARDEN IN RESPONSE TO PHYSICAL TRAUMA
When reality surpasses fiction.
So basically, we're talking about the precursor to the shields from Dune
This particular arrangement is most effective in preventing penetration by knives or ice picks.
finally, a nice video about non-newtonian fluids!
And when we needed him most, he returned
The problem with this principle is the issue with viscosity; while it works in some applications for impact resistance, the viscosity of the compound cannot be applied over a large area due to pooling; therefore, it cannot be used in a vest to provide the level or protection to stop a bullet without rendering the wearer unable to be mobile. The solution would need to be applied across a cross-stitch patter to keep the solution from pooling, then each layer would need to be re-applied over several layers that overlap stitches; thereby, stacking the pockets of stitched pillows over each stitch later like stacking eggs on top of each other; eggs filling the gaps. but again, each layer must be leak proof, and several layers thick. In theory, it can be done, but I am not certain it would work without giving much thought on the design.
This makes me curious what the difference in penetration would be when shooting a tub of water big enough to catch a bullet, vs one filled wih this ooblek stuff.
The bullet may not kill you directly, but the impact will.
Nice experiment! Thanks for sharing