John Hart, Massachusetts Institute of Technology


John Hart is Associate Professor of Mechanical Engineering and Mitsui Career Development Chair at MIT.  Prior to joining the MIT faculty in July 2013 he was Assistant Professor of Mechanical Engineering, Chemical Engineering and Art/Design, at the University of Michigan.  He has Ph.D. (2006) and S.M. (2002) degrees from MIT, and a B.S.E. (2000) degree from Michigan, all in Mechanical Engineering. John’s research has been recognized by: the R&D100 Award (2008, 2009), the DARPA Young Faculty Award (2008), the ASME Pi Tau Sigma Gold Medal (2009), the SME Outstanding Young Manufacturing Engineer Award (2010), the AFOSR Young Investigator Program (YIP) Award (2011), the NSF CAREER Award (2012), and the ONR YIP Award (2012).  At MIT, John leads the Mechanosynthesis Group (http://mechanosynthesis.mit.edu), which creates new machines, materials, and design principles for advanced manufacturing, including carbon nanomaterials, additive manufacturing processes, and origami-inspired materials design.  John also teaches undergraduate and graduate courses in design and manufacturing, nanotechnology, and research methods, and a MIT summer professional course on additive manufacturing.

 

Abstract:

Manufacturing of carbon nanotube macrostructures: progress, principles, and potential

Worldwide commercial interest in carbon nanotubes (CNTs) is reflected in a production capacity that presently exceeds several thousand tons per year. Currently, bulk CNT powders are incorporated in diverse commercial products ranging from rechargeable batteries, automotive parts, and sporting goods, to boat hulls and water filters.  Nevertheless, scalable manufacturing of organized macrostructures of CNTs, which retain promise to have exceptional mechanical and electrical properties, largely remains an unmet challenge.  Moreover, it is imperative to develop process-structure-property relationships that enable design and optimization of the CNT synthesis conditions to achieve target material performance. To frame this discussion I will review recent progress in the synthesis, characterization, and performance of aligned CNT materials, specifically CNT forests and fibers, and provide my perspective on the most important research and manufacturing challenges for the coming years.