Homemade STF ballistics armor!, page 2

reply to post by TheLastStand

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Strg + F -> "armour" ...something about page 800 but like the whole book its hard to read...

reply to post by Hessdalen

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That's ok later I'll make some vids to make it easier and hopefully after that I'll see a mob of angry protestors wearing the stuff.

reply to post by TheLastStand

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I'm working with a friend to create a similar suit, but with a few deviations back to ancient armor. Ours will have shoulder, armpit, and upper arm coverage as well as upper thigh coverage. it will have reinforced breast and backbone plates, and in addition to being resistant, it will also be shaped to deflect any attacks and provide other tactical support such as carbiners and weapons.

He has been doing a lot of pre-work on it with kevlar and carbon fiber, but this seems like a way to reduce the thickness and make it more flexible! Definitely will be looking into this.

I'm not sure I understand how the liquid SiO2 is absorbed by the fiber's though? Does it stay somewhat wet? Is it sealed in so it the suspension liquid (methanol/ethanol) doesn't evaporate? Doesn't kevlar break down rather quickly when exposed to acidic moisture like sweat?

reply to post by TheLastStand

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Hi There..

Could other materials be used? For example a material harder than silicon dioxide such as boron nitride or silicon carbide? What are the conditions that must be met for it to function as an STF?
Does the particle have to be spherical in nature or will any particle shape work? What size must the particles be? Is 15nm a guide/range or a strict ruling?

When baking in the oven, what temperature do you use, and for how long?

What polyethylene glycol are you using as there are many grades...?

Thanks - fascinating post

reply to post by Quadraphobe

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Liquid armor is based on non newtonian liquid - silica nanoparticles suspended in liquid form hydroclusters under pressure and that cause it to get hard as ceramic. Sand or cornstarch with water are examples of shear thickening fluids. Don't know if silica carbide would work, but the harder material the better it will stop high velocity bullets. Silica dioxide is 7 by moth's scale, silica carbide 9 and army armor plates 9.5.
Liquid armor is very good solution to make kevlar stab proof and lightweight. Theoretically it helps against sharp ammo as it also can ignore kevlar.

I wanted to know how much of materials would required for single vest? How you seal liquid, is it dripping through holes? Kevlar is quit rare and expensive so I think nylon could be used instead, in my country knives are bigger problem. I read that PEG molecular mass grade used is 200-600, but could other liquids also be used?
Could you share photos, videos?

reply to post by sauroman1

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You can also get sintered ballistic alumina plates from Fraunhofer, also known as "transparent aluminum", it's good for rifle fire and they'll give you a chunk to play with if you're a corporation.

We were looking into getting a big break on the plates that weren't optically acceptable for use in body armor, but they don't have enough fallout anymore. Alas.

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