Created a lightweight ballistic material that protects against bullets and explosions at the same time
Posted On March 23, 2021
Worlds First 50cal rated body Armor
Researchers have developed a new fiber for body armor that can stop bullets, shrapnel, shrapnel, and withstand extreme high temperatures without limiting the soldier’s mobility.
Since the end of the First World War, more military personnel have died in battle from explosions than from bullets. Current materials provide good protection against either ballistic threats or exposure to temperature, so the equipment usually consists of several layers, which makes it heavy and difficult to move.
A team of scientists from Harvard University, in collaboration with the US Army and West Point, has developed a new multifunctional nanofiber material that simultaneously provides reliable mechanical protection and has high thermal insulation properties..
The researchers achieved this by creating a porous vapor aramid fiber (Kevlar polymer) with an ordered molecular structure that allows it to effectively withstand and distribute direct impact energy and limit heat diffusion..
Immersion rotary jet spinning was used to make the new material. This method involves placing liquid polymer solution in the tank followed by it pushing through a tiny hole by centrifugal force.
When the solution flew out of the tank, then at first it passed through the air, where the polymers were elongated and leveled and then dropped into a bath with a liquid to remove the solvent, precipitate the polymers, and cure the fibers. Since the bath also rotated, the nanofibers, following the flow of the vortex, wrapped around the collector at the base of the device..
During the tests, porous nanofiber was placed between sheets of woven aramid and they stopped armor-piercing projectiles. much the same as a stack of aramid sheets. At the same time, the new material provided 20 times more thermal insulation than commercial Kevlar or Aramid..