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Hi, I am Hanze Ying from
Cheng's group in the University of Illinois at Urbana-Champaign Materials
Science and Engineering,
and today I'm going to demonstrate you our
recently developed self-healing material which is based on Hinder-Yurick
chemistry.
The preparation of our self-healing material is from
several commercially available reagents, so we mix them together in a
proper ratio,
and then add the catalyst inside, so we get this prepolymer solution
and then we add this prepolymer solution
into the dog bone shaped mold, and let it cure
in room temperature for about one day, and then we can get this dog bone shaped
material
for our self-healing application.
We make this material into this dog bone shape, transparent and tacky
gel so we can see that, like, this is very stretchy.
And now we are going to use the knife
to cut the material in the middle.
So now the material are cut into two pieces. So now I'm going to bring the two
pieces back together,
and touch it for one minute.
And then I'm gonna put this material in the
37 degrees C incubator and let it heal for
for about one day. So this is the piece of material we cut
yesterday and heal for 24 hours.
We can see the cut in the middle, and now
if we stretch it. we can see that the material won't broke in the middle,
which means it's very well healed.