Biography: Michael D. Guiver obtained his BSc (London University) and MSc (Carleton University) in Chemistry, and his PhD in Polymer Chemistry from Carleton University in 1988. He has been an Editor for the Journal of Membrane Science since 2009. He served on the Editorial Advisory Board for Macromolecules and ACS Macro Letters, American Chemical Society, from 2013-2015. He is also on the International Advisory Board of Macromolecular Research and on the Editorial Board of Polymers. He is a Fellow of the Royal Society of Chemistry, an ACS Poly Fellow, and is a member of the International Advisory Board of the Barrer Centre, Imperial College, UK. He has published over 220 SCI articles and 11 book chapters and holds about 25 patents and patent applications in the area of polymeric membrane materials. From 1987-2014, he was a scientist at the National Research Council Canada. In 2009-2013, he joined the Department of Energy Engineering at Hanyang University, Seoul, Korea as a WCU distinguished visiting professor, under the “World Class University” program, and continued as a BK21-Plus visiting professor from 2014-2018. In September 2014, he was appointed as a National 1000-Plan Foreign Experts professor at the State Key Laboratory of Engines, Tianjin University, China. His ongoing research interests are in membrane materials, specifically polymer electrolyte membranes for fuel cell and battery applications and the development of specialized microporous polymers for gas separations.
Title of Speech: Membrane concepts for gas separations
Abstract: Membranes with high CO2 permeance are of great interest for the capture of greenhouse gases and natural gas purification. Our research originally focused on few-layered selective skin layers of graphene oxide (GO) supported on commercial ultrafiltration membrane substrates to create CO2-selective channels by interspersing the layers with CO2-philic compounds [Energy & Environ. Sci. 9 (2016) 3107-3112; Angew. Chem. Int. Ed. 56 (2017) 14246-14251]. These interlayer compounds serve (1) as crosslinkers and molecular spacers to stabilize and control the d-spacing, (2) to create a chemical environment, and (3) to create a ‘water’ environment. Now, metal-induced ordered microporous polymers (MMPs) are reported as a new class of materials derived from functional polymers, small organic linkers and divalent metal ions [Nat. Mater. 18 (2019) 163-168]. MMPs are 3D self-assembled nanoparticles in the range of 50-100 nm, which can simply be coated as dilute dispersions onto modified polysulfone substrates, providing a practical route to prepare large-scale membranes with defect-free ultrathin gas-selective coated layers. CO2 permeances in the range of 3000-5500 GPU and suitable mixed gas CO2/N2 selectivities are obtained, which are promising for meeting DOE CO2 capture targets.
Current research is underway on in situ fabrication of large-area ultra-thin metal organic frameworks on commercial ultrafiltration membrane supports. Further work on covalent organic framework mixed matrix membranes is being conducted.
Biography: Ki Bong Lee received his BE and MS from Department of Chemical Engineering, Korea University, Korea in 1999 and 2001, respectively, and PhD from the School of Chemical Engineering, Purdue University, USA in 2005. He worked as a post-Doctoral research associate in Department of Chemical Engineering, Lehigh University, USA from 2006 to 2007. He was a senior researcher at the Korea Institute of Energy Research from 2008 to 2009. He has been a professor at the Department of Chemical and Biological Engineering, Korea University since 2009.
Title of Speech: Development of porous carbon materials using polymers and its application to greenhouse gas capture
Abstract: In this talk, recent studies to prepare porous carbons using polymers are introduced.
First, polyvinylidene fluoride (PVDF) was used to develop porous carbons. The carbonized PVDF has been known for exhibiting high surface area and pore volume with highly uniform micropores, which give the potential for high adsorption capacities. The effects of carbonization temperature on the characteristics and greenhouse gas (CO2 and CF4) adsorption behavior of prepared carbon materials were investigated. The PVDF-based porous carbons showed high surface area and pore volume more than 1000 m2/g and 0.4 cm3/g, respectively, and the significant increase of these textural properties was mainly attributed to the development of micropores. The surface area and pore volume could be increased up to 2750 m2/g and 1.465 cm3/g, respectively, with further activation. It is noteworthy that the greenhouse gas adsorption uptake was highly influenced by narrow micropore volume, rather than surface area or total pore volume. The developed PVDF-based porous carbon showed high greenhouse gas adsorption uptake, excellent recyclability, easy regeneration, and rapid adsorption–desorption kinetics.
Second, waste polyethylene terephthalate (PET) plastic bottles were used to prepare environmentally friendly and cost-effective porous carbonss. PET plastic bottles were carbonized and activated to develop porous carbons, and their greenhouse gas adsorption behaviors were investigated from both equilibrium and kinetic perspectives. Varying the activation temperature had a dramatic effect on the textual properties of the prepared carbons. The greenhouse gas adsorption on the PET-derived porous carbons was also mainly related to the pore volumes of narrow micropores. The PET-derived porous carbons not only exhibited high greenhouse gas uptake, but also good selectivity, simple regeneration, excellent cyclic stability, and rapid adsorption-desorption kinetics. The development of porous carbons from waste PET plastic bottles can provide cost-effective and promising greenhouse gas adsorbents, and can also alleviate environmental issues caused by PET plastic waste.
Biography: Dr. Xiaohong Zhu is currently a full professor at the Department of Materials Science & Engineering, Sichuan University, China. He received his BSc degree in Materials Physics from Sichuan University in 2000 and PhD degree in Condensed Matter Physics from the Institute of Physics, Chinese Academy of Sciences in 2006. After that, he did 3-year postdoctoral research at CNRS and CEA in France, and then joined Sichuan University as a professor in 2009. From April 2012 to April 2013, he was also a research scholar at the Department of Physics & Department of Materials Science and Engineering, University of California, Berkeley, USA. He was selected as a New Century Excellent Talent in University of China in 2009 and an Outstanding Young Scientific and Technological Leader of Sichuan Province, China in 2011, and won the 2018 China Industry-University-Research Collaboration Promotion Award. Prof. Zhu’s research interests include mainly graphene-based electrode materials and novel solid-state electrolytes for energy storage devices (supercapacitors and lithium-ion batteries), piezoelectric ceramics, as well as multifunctional oxide thin films and related electronic devices. Until now, he has authored/co-authored more than 110 SCI-indexed papers and 2 scientific books.
Title of Speech: Inorganic solid electrolytes for all-solid-state lithium batteries
Abstract: As a typical type of energy storage devices, lithium-ion batteries (LiBs) play a more and more important role in the modern life. However, organic polymer-based electrolytes are widely used in commercial Li-ion batteries, which may cause a large number of safety issues, considering the flammability, electrochemical stability, and leakage. Fires and explosions of LiBs have been reported throughout the world, and thus, safety has become one of the main obstacles for the wide application of LiBs. Therefore, the continued drive for high-performance lithium-ion batteries has imposed stricter requirements on the electrolyte materials and all-solid-state lithium batteries (ASSLiBs) have entered the field. In contrast to organic liquid electrolytes, solid inorganic ones show better thermal and chemical stabilities and also present a great advantage to the point that they can enable the use of high capacity electrode materials. Accordingly, a great deal of effort is underway to improve further the ionic conductivity and electrochemical/chemical stability of inorganic solid electrolytes and the solid electrolyte/electrode interface as well, thereby pushing them further for practical applications. In this talk, I will present our research breakthroughs in studying the preparation, structure, electrochemical properties, and potential applications of several important inorganic solid electrolytes, such as Li-oxide garnets like Li7La3Zr2O12 (LLZO), perovskite-type La2/3−xLi3xTiO3 (LLTO), NASICON-type Li1+xAlxTi2-x(PO4)3 (LATP), and sulfide-based LGPS-type Li10.35Ge1.35P1.65S12.
Biography: Dr. Ru is currently a Professor in department of mechanical engineering, University of Alberta, Canada. Dr. Ru received his doctorate in solid mechanics at Peking University (China), and then worked in the Institute of Mechanics, Chinese Academy of Science and held a number of visitor/research positions in several universities in Italy, USA and Canada. He joined the University of Alberta in 1997 and became a Professor in 2004. Dr. Ru’s past research areas include plastic buckling of structures, mechanics of elastic inclusions, electroelastic mechanics, and some applied mathematics problems related to solid mechanics. Besides traditional areas of solid mechanics, his recent research interests include solid mechanics at micro/nano scales, cell biomechanics, and dynamic ductile fracture.
Title of Speech: Metamaterial-like vibration of mass chain-filled carbon nanotubes
Abstract: Inspirited by recent literature on metaelastic materials of locally resonant microstructure, vibration of CNTs (carbon nanotubes) filled with mass chains (such as carbon atom-chain or C60 molecule chain) is studied as a potential new kind of metaelastic materials. Our work revealed that a mass chain-filled CNT does exhibit negative effective mass density and an associated "bandgap" within a certain terahertz range of frequencies. Our results clearly confirmed that when the applied exciting frequency falls in the bandgap, forced vibration of the mass chain-filled CNT is highly isolated nearby the site of the applied stimulus and all other parts of the filled CNT remains essentially static. This result predicts that mass chain-filled CNTs could offer a new kind of metaelastic materials and exhibit remarkable vibration isolation in the terahertz range. The results shown here may provide useful insights into vibration controlling of CNT-related materials at terahertz frequencies.
Biography: Juan C. Suárez-Bermejo obtained his BSc (Complutense University, Madrid) in Chemistry, MSc (Technical University of Madrid, UPM) and his PhD (Complutense University, Madrid) in Materials Science and Engineering, in 1990. He has been associated editor for the Journal of Adhesion Science and Technology, on the topics of structural adhesion and fracture mechanics of adhesively bonded joints, 2012-2015. He served as Director of the Structural Materials Research Centre (CIME) of the Technical University of Madrid (UPM) from 2014-2018. He is since 2018 Deputy Director of Research for R&D and PhD Studies at the Naval Architecture and Ocean Engineering School (Technical University of Madrid). He has published over 120 articles, 3 books, 2 books chapter, and holds 3 international patents in the field of hybrid materials for marine and offshore applications. He has been visiting researcher at the Joining and Welding Research Institute (JWRI) of Osaka University, Japan, 1995-1996. Co-chairman of the 10th European Adhesion Conference (EURADH 2014), held in Alicante, Spain. In 2000 he was appointed as Director of the Non Destructive Testing Lab, in the Network of Accredited Testing Labs of Madrid. He has served as Director of the Naval Architecture and Shipbuilding Department, Technical University of Madrid, 2005-2009. Founder of the spin-off company Tekhimat S.L., for the development, design and manufacturing of structural hybrid materials, 2009. His ongoing research interests are in the development of new bioinspired structural hybrid materials, for marine and offshore applications, specifically in the interaction at fluid-structure interface and design of shielding layers for protecting the hull against slamming events during sailing.
Title of Speech: Hybrid Fiber-Metal Laminates for Lightweight Marine Structural Applications
Abstract: Steel has certain limitations that impede continued improvements targeted to construct lighter, more resistant and safer marine structures. Composite materials are light and resistant, but the manufacturing processes are more labor-intensive and costly; in addition they are very sensitive to damage from impact and can present problems of degradation of mechanical properties through water absorption, and fire safety issues. Fiber-Metal Laminated (FML) hybrid materials combine a high resistance to impact, an extended durability, and the versatility in processing of metals with a specific strength and stiffness in the direction parallel to the fibers, as well as good resistance to fatigue, characteristics of the composites. In the old art of naval construction only one revolution took place, the step from wood to steel, but perhaps we are in the second revolution, the use of FML materials capable of satisfying all the design and fabrication requirements for lighter structures that are in turn more resistant, permit higher speeds of movement and lower energy consumption. Repair of existing vessels can also be improved with the use of these hybrid materials. In lightweight designs, weight reduction by using hybrid materials will reduce CO2 emission and increase fuel economy, which will significantly reduce environmental impact. A promising area of application is the design of hybrid-towers for wind energy converters (WEC). However, the requirements on the supporting structures will be also increased with the development of bigger turbines, especially in offshore parks. A tower section made of FML materials offers some advantages with regard to the stability and structural integrity of these huge structures floating in the ocean. Reducing construction and operating costs, and keeping the safety standards: these advantages are key factors in selecting FML hybrid materials for lightweight structural marine applications.