Graphene Synthesis GraphenePolymer Nanocomposites.pdf

Graphene Synthesis Graphene/Polymer Nanocomposites Ken-Hsuan (Kirby) Liao Advisors: Dr. Chris Macosko Dr. Andre Mkhoyan Department of Chemical Engineering Materials Science University of Minnesota Ph.D. Defense Minneapolis MN September 19th, 2012 1 ? University of Minnesota - Ph.D. Materials Science, 2008~Present Graphene Synthesis Graphene/Polymer Nanocomposites ? Double Bond Chemical Co - Research Development Engineering, 2008 Polymeric Materials ? Taiwan Army, 2007~2008 ? National Taiwan University - M.S. Polymer Science Engineering, 2005~2007 MS Thesis: Thermoplastic polyurethane composites for dental materials - B.S. Chemical Engineering, 2001~2005 BS Thesis: Mechanical thermal properties of thermoplastic polyurethane Biography 2 Graphene 0-D: Bucky Ball, 1986 1-D: Carbon Nanotube, 1991 3-D: Graphite, 1500 2-D: Graphene, 2004 Graphene Properties Modulus 1 TPa Strength 130 GPa Electrical Conductivity 6000 S/cm Surface Area 2600 m2/g Graphene: monolayer of carbon atoms packed in 2D hexagonal manner 3 Why Graphene/Polymer Nanocomposites? Light-weight stiff materials BMW i8, a car made with composites. Boeing 787, contains 70,000 lb composites. Food packaging From Brown Machine LLC Conductive coating From Thermal Spray Technology Inc 4 Picture From Mission Impossible 4 From Boeing Challenge of Graphene/Polymer Nanocomposites: Dispersion Bicerano, Polymer, 2002, 43, 369 5 aspect ratio material needed Motivation of Novel Graphene Synthesis Criteria of Graphene Synthesis Process for Nanocomposites: 1. Massive production 2. Low cost 3. Environmental friendly process 4. Easy to transport 6 Graphene Precursor: Graphite Oxide ? Hydrophilic (Carbon/Oxygen=2/1) ? Electrical insulator GO/water hydrophilic Graphene/water hydrophobic 7 Gao, W. et al, Nature Nanotechnology 2011, 6, 496 Approac