Abnormal inverse-freezing phenomena, in which fluids solidify upon heating. It was shown that upon impact, some of these inverse-freezing fluids undergo solidification by absorbing impact energy. This novel phase transformation, which occurs in timescales of microseconds, is in stark contrast to most materials which soften upon heating and lose some of their solid bonds upon impact. It was also demonstrated that upon shock-induced solidification, these systems dissipate the shockwaves and attenuate the incoming impact force.
Shock absorbing solutions are enhanced by compositing the inverse-freezing components with additives, and by packaging solutions, producing synergistic effects that amplify the shock attenuation. Composites of the systems show improved properties of hardening under dynamic loading and enhance the strain-rate sensitivity of our systems. Compositing and material-packaging interface interactions has also showed a significant effect on the novel materials’ uptake of energy.
- Shockwave attenuation across broad shock frequencies
- Inexpensive, non-toxic, water based, high molecular weight materials
- Long term stability
Applications and Opportunities
- Traumatic organ injury protection
- Building & packaging protection
- Wearable protective gear