Tuesday, August 29, 2006

A New Class of Composite Materials - Graphene-based Composite Materials

Professor Rodney Ruoff and colleagues at Northwestern University and Purdue University have developed a process that promises to lead to the creation of a new class of composite materials - graphene-based materials. They reported the results of their research in Nature, 442 (2006) 282-286. This team has overcome the difficulties of yielding a uniform distribution of graphene-based sheets in a polymer matrix. Such composites can be readily processed using standard industrial technologies such as moulding and hot-pressing. The technique should be applicable to a wide variety of polymers. The graphene composites may compete with carbon nanotube-based materials in terms of mechanical properties. This new class of composites may stimulate the applied mechanics community to study the fundamental reinforcing mechanisms of graphene sheets from both experimental and theoretical approaches.

4 Comments:

At 8/29/2006 6:05 PM, Blogger John Dolbow said...

One of the issues that is not immediately clear to me concerns the advantages of these composites over traditional carbon-fiber composites. The latter are readily available and easily manufactured, for some time now.

My understanding is that carbon-nanotube-based composites have not necessarily outperformed classical carbon-fiber based composites, from a strict mechanics perspective. The notion is that they may offer more in the way of multi-functionality (combined mechanical and electrical properties). Any thoughts?

 
At 8/29/2006 8:13 PM, Blogger Rui Huang said...

From my limited knowledge, I would agree with John on that CNT-based composites have not lived up to many expections on their mechanical performance. From a mechanician point of view, I don't quite understand what would make graphene sheets better than CNTs. Any experts in composites mechanics please help me. Thanks.

 
At 8/30/2006 5:15 AM, Blogger Zhigang Suo said...

I added a link to the URL of the paper. You can view the abstract, but not the full paper. If your institution subscribes to Nature, you can make a tiny modification to the URL, so that you can view the full paper. This method is easy and general, and will allow us to share journal articles across institutions.

 
At 9/18/2006 6:03 PM, Anonymous Zain said...

I am curious to knowher issue is Graphene composites will show imrpove electrical transport over CNTs as there are dangling bonds along the edge of Graphene sheets. Any comments?

 

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