DARPA Foam

Imagine a spray can of foam insulation that goes into a cavity and expands to fill the space.  That example is quite close to a DARPA project’s new polyurethane polymer foam designed to stop bleeding in parts of the body where pads and tourniquets can’t be applied.  The material involves a polyol phase and isocyanate phase, which after being injected separately combine and expand to 30 times their original volume. A video in this piece shows how the material works. MORE

Image Credit:  DARPA and Gizmag.com