Costas GaliotisFORTH (FORTH/ ICE-HT)
Professor Costas Galiotis
He is a Professor at the Chemical Engineering Department of University of Patras and Collaborating Faculty Member of the Institute of Chemical Engineering Sciences of FORTH (FORTH/ ICE-HT). He graduated from the University of Athens in 1977 and received his PhD in Materials Science and Engineering from the University of London (Queen Mary College) in 1981. From 1985 till 1997 he served as a tenured Lecturer and then Reader at Queen Mary College and has taught both at Queen Mary and Imperial Colleges of University of London. He moved to Greece in 1997 as a Research Director of the Institute of Chemical Engineering Sciences of FORTH and was appointed Professor at the University of Patras in 2002. From 2007 till 2013 he acted as the Director of whole FORTH/ ICE-HT. Since 2017 he serves as an elected member of the Executed Council of the newly founded Hellenic Foundation of Research & Innovaton and he is the Director of its Physical Sciences programme.
His current research interests are in the areas of nano and micro-mechanics, interface interactions, graphene and CNT production and nanocomposites. He has pioneered the technique of laser Raman microscopy for measuring stresses and strains in nano and micro inclusions embedded in polymer matrices. He has published over 200 journal papers and numerous book chapters and reviews which have been cited more than15000 times (GS). Since his return to Greece he has attracted funding for his own work of over 12 million Euros inclusive of ERC-Advanced Grant, ERC Proof-of-concept, FET-Open, Graphene Flagship, FP5, FP6, FP7 and Horizon 2020 CEC Grants, Marie-Curie Grants etc. As a Director of FORTH/ ICE-HT he attracted institutional grants of over 10 million Euros.
He is the Editor-in-Chief “Graphene Technology” (Springer-Nature) and of “Advanced Composites Letters” and Editorial Board Member of “Scientific Reports” (Nature). He has served in all the major Research Panels of CEC (ERC, INFRAIA, Teaming, Marie-Curie, SME etc) and has also acted as Expert, Vice-Chair and Independent Observer in CEC evaluation committees. He was the Head of the National (Greek) Representation in the NMBP (Nano-Materials-Bio-Production) Committee of Horizon 2020 (2011-2018). He is a founding member of the Graphene Flagship (2013-2023) and currently a member of its Executive Board and WP leader of the area of Composites that comprises of 19 academic institutions and industrial firms. He was the chairman and organiser of a number of international conferences such as “Graphene Week 2017’’, ‘’Industrial Technologies 2014’’, ‘’GrapHEL (2012)’’, “Onassis/ FORTH lecture series (2013)”, ‘’NANOCONF (2007)’’, ‘’ECCM 11 (2004)” and other.
He has received recent honorary Awards from the Academy of Athens and the John S. Latsis Public Benefit Foundation.
Title：Graphene Composites with emphasis on current results and developments
Symposium
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Abstract
Graphene is an ideal 2D crystal which possesses a unique combination of mechanical properties in tension; that is high stiffness (~1 TPa), high strength (>100 GPa) but also high ductility (>20%) [1]. Several experiments confirm graphene as the strongest material ever measured but there are still a number of open questions about the tensile strain-to-failure and the intrinsic fracture toughness of the material. In compression [2, 3], monolayer graphene embedded into matrices exhibits a compression strain to first failure (Euler buckling) of 0.6-0.7% which is indeed a very high value for a monoatomic material [4]. Based on held promise, we have witnessed over the last decade a great explosion of graphene composites. Certain advances in terms of processability vis-à-vis other types of graphitic inclusions such as CNTs have been observed that makes graphene more attractive for many applications at low loadings. Although mechanical property improvement has been found to be moderate, however, the coupling of mechanical with other physical properties such as thermal, electrical, optical makes graphene composites an interesting and viable proposition for many products.
In this paper we will review and classify the various kinds of graphene composites with emphasis to those employing a polymer matrix and will show the importance of controlling the graphene lateral size, the graphene thickness [5] and the presence of defects (such as wrinkles, folds, cracks etc) [6,7] upon the mechanical integrity of these composites. Other more exotic developments that may have an impact to this area in the near future, such as roll-to-roll automated graphene production and the fabrication of polymer nanostructures [8,9] will be briefly mentioned and commented upon.
References
[1] Novoselov K. S. et al., Proc. Natl. Acad. Sci., 102, 10451 (2005)
[2] Tsoukleri G et al., Small 5,2397 (2009).
[3] Frank O et al., ACS Nano 4, 3131 (2010).
[4] Androulidakis C et al., Sci. Rep. 4 5271 (2014)
[5] Kovtun A et al, 2D Materials, 6/ 2, 025006 (2019)
[6] Polyzos et al., Nanoscale 7, 13033 (2015).
[7] Pastore MG et al, Nature Comms, 10, 1572 (2019)
[8] Vlassiouk I et al, ACS Appl Mater Interfaces, 20, 10702 (2015)
[9] Pavlou Ch et al, submitted (2019)
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