Figure 2.1 http://www.nanowerk.com/spotlight/id2100.jpg |
http://www.blogger.com/goog_2050431232 textiles/PerfMat_Textiles_Module.ppt |
Liquid Body Amour:
A soldier protected by liquid amour (and a hard exoskeleton) http://www.tacticalwarfightergear.com/tacticalgear/ catalog/images/exoskeleton_military.JPG |
Another development courtesy of nanotechnology, that is being used for military and protection purposes, is 'liquid body amour' in Kevlar vests. Under normal conditions the new vest acts in a similar way to water. However upon impact it stiffens, thus providing adequate protection. The key component in the 'liquid armor vest' is shear thickening fluid (or STF) which is what provides the vest with its strong properties. STF is composed of hard particles, which are suspended in a liquid form. Nanoparticles of silica are highly important to the chemical make-up of this solution. The combination of hard kevlar and the flowable STF components results in a material that is suitable for the future soldier. Liquid body amour gives the wearer an impact resistant vest from bullet damage to pointed objects such as needles and swords.
"During normal handling, the STF is very deformable and flows like a liquid. However, once a bullet or frag hits the vest, it transitions to a rigid material, which prevents the projectile from penetrating the soldier's body," [Dr. Eric Wetzel, a mechanical engineer from the Weapons and Materials Research Directorate]
How Liquid Body Amour Works Diagram:
Source: http://science.howstuffworks.com/liquid-body-armor.htm
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