Unit 5.1 Minidoc: Self-Healing
Self-healing materials use advanced chemical mechanisms
in order to reduce microscopic damage in case of fracture.
Modern chemistry research and development enable the design
of these materials. Video program cues: 0:30-4:15
The breakability of matter
"I have seen experiments done by the
group at Virginia Tech, where they are taking sheets of
this ionomer and shooting bullets through it and a bullet
makes a hole, but the hole instantly heals. Thats
a very interesting case, because what the bullet does, it
tends to fluidize the polymer sheet locally where the bullet
hole was, but at the same time you have a large number of
metal ions which tend to cluster together again
it instantaneously heals."
Dr. Richard Wool
Professor of Chemical Engineering, University of Delaware
Steve, S. (2001)' Plastic Mends Its Own Cracks, 'Chemical
& Engineering News, Vol. 79, No. 8, pp: 13.
Healing microscopic fractures
Heinhorst, S.; Cannon, G. (2002)' Nature: Self-Healing Polymers
and Other Improved Materials, 'Journal of Chemical Education,
Vol. 79, No. 1, pp: 10-11.
to Unit 5.2