Magical 'Liquid Armor'
We know that liquids are soft and flowing, while armor is hard and sturdy. How can these two "little companions" bond together well? This starts with a special liquid——
According to Newton's viscosity law, the viscosity value of liquids is constant, such as water, alcohol, and other liquids, which are called Newtonian fluids. So, a non Newtonian fluid is a liquid that does not satisfy Newton's viscosity law, and its viscosity value is a variable. Just like a paranoid little girl, when gentle, she is a cute girl; When she got angry, she transformed into a female man. This reflects the important characteristic of non Newtonian fluids: the viscosity value of the fluid increases with the increase of pressure and impact force.
After talking about the liquid, let's talk about "armor" again. At present, there are many types of bulletproof vests equipped by military forces around the world, with the most common being Kevlar fiber bulletproof vests. By utilizing the characteristics of non Newtonian fluids, scientists have developed a shear thickener, which contains nanospherical particles and is one of the hardest non-metallic materials in nature. This material can play a role in bulletproof, stab proof, and shock absorption. When we immerse traditional Kevlar fibers in shear thickener and undergo a series of complex manufacturing processes, the magical liquid bulletproof vest is born.
Compared to ordinary bulletproof vests, liquid bulletproof vests use fewer materials and have a 45% reduction in thickness, making them lighter and easier for individual combat operations. When shear thickener and Kevlar fiber are bonded together, they can efficiently absorb the impact force generated by bullets. When bullets hit liquid bulletproof vests, the impact force is immediately dispersed, and the destructive force is greatly reduced, providing stronger protective performance.
