Researchers at the University of Wisconsin–Madison have introduced a groundbreaking foam with exceptional impact resistance. The innovation is a vertically aligned carbon nanotube foam, and its development was shared in the scientific journal Experimental Mechanics (EM).
The foam is built from cylinders formed by carbon layers one atom thick, meticulously packed into dense, tall columns. This unique structural arrangement endows the material with remarkable mechanical strength and resilience, enabling it to absorb energy efficiently during rapid loading events.
Beyond mechanical sturdiness, the vertically oriented carbon nanotube foam demonstrates strong thermal conductivity and an elevated diffusion coefficient. When employed as a lining in protective gear, it can help keep wearers cooler in hot conditions while maintaining high levels of protection.
Creators of the material report that the foam dissipates stress during both impact and shear, achieving performance about 30 times greater than the shock-absorbing layers used in current U.S. Army combat helmets. This heightened energy dissipation could translate to enhanced safety and durability in various applications, from sports protection to military equipment.
In addition to its potential for protective gear, the carbon nanofoam shows promise for electronics where shock absorption and cooling are critical. Integrating this foam into devices could improve longevity and performance by reducing mechanical strain and managing heat more effectively.
Earlier work in another country explored carbon nanotube approaches for touch screen production, highlighting the broader potential of carbon nanotube technologies. The Wisconsin breakthrough adds a new dimension to this field by presenting a foam with an oriented structure and superior energy management characteristics.