MSU researchers have developed
a composite material modified with nanoparticles that is economical and could
also help automakers meet the new fuel efficiency standards recently announced
by President Barack Obama.
 | | This image, taken with an electron microscope, shows the unique "platelet" shape of these nanoparticles. |
The new nanocomposite is based on a nanomaterial invented at MSU – xGnP®
Graphene Nanoplatelets – which is added to sheet molding compound (SMC)
to make it stronger and tougher, as well as electrically conductive. SMC is
used in many industrial applications, especially the manufacture of automobile
parts. Since the new nanocomposite is stiffer and stronger, less of it can be
used to manufacture finished parts. And that could be a boon to automobile manufacturers
who are faced with meeting the new automotive fuel efficiency standards, which
will require automakers to increase fuel efficiency by more than 5 percent per
year starting in 2012. To achieve these standards, automotive companies will
need to take considerable weight out of their future cars (while still maintaining
structural safety), and this SMC formulation could be a significant help.
This image, taken with an electron microscope, shows the unique "platelet"
shape of these nanoparticles.
The research was led by Lawrence T. Drzal, University Distinguished Professor
in the Department of Chemical Engineering and Materials Science, director of
MSU’s Composite Materials and Structures Center (CMSC) and chief scientist
at XG Sciences, Inc., a start-up company headquartered in East Lansing, Mich.
Research shows that when about 3 percent of the new material is added to the
standard SMC formulation, the resulting composite material is stronger (by 40
percent) and stiffer (by 20 percent), and also has better impact strength (an
increase of 80 percent).
“In addition to the increase in strength,” says Drzal, “this
new nanocomposite is electrically conductive enough so that it can be electrostatically
painted without requiring the additional coating process now used to paint most
SMC parts. This will save money in manufacturing and reflects our approach toward
overall cost effectiveness with these new advanced materials.”
“This new SMC is just one of several improved composite materials that
can be made with our xGnP® Graphene Nanoplatelets,” says Michael R.
Knox, CEO of XG Sciences. “We look forward to the introduction of a whole
family of advanced composite materials based on our products. We are now shipping
materials to customers around the world and are working closely with several
large potential users to get these new composites into production.”
Posted July 28th, 2009
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