Non-Newtonian fluids in liquid armour

Non-Newtonian fluids are already found in liquid armour, which is flexible like fabric but stiffens suddenly to fend off an incoming bullet or knife. The fluids are also being investigated for use in cars, where they could dampen shocks without requiring additional energy.

Non newtonian fluids:

Oobleck has a split personality because the corn starch exists as a solid suspended in liquid water. Gently poke real-life oobleck and your fingers easily slip through, but slap it and it suddenly stiffens

Along with ketchup and toothpaste, which jam up if you squeeze their containers hard, it is an example of a non-Newtonian fluid. “They can be solid if you make them flow too fast,”

Oobleck is the most extreme variety, capable of supporting a person running across a pool, though they will sink if they slow down.

Why oobleck behaves this way? the water flees the point of impact faster than the starch, leaving the solid particles behind. These jam up, forming a matrix of surprising strength.

Source:
http://www.newscientist.com/mobile/article/mg21829134.300-miracle-mix-looks-like-liquid-but-shatters-like-glass.html

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