Chinese Academy of Sciences (CAS)China
Design and synthesis of polymeric semiconductors for high-performance field-effect transistors
Yunqi Liu was graduated from Nanjing University in 1975, received a doctorate from Tokyo Institute of Technology, Japan in 1991. Presently, he is a Professor at the Institute of Chemistry, Chinese Academy of Sciences (CAS), an Academician of CAS, and a Member of The World Academy of Sciences (TWAS). His current research interests include design and synthesis of molecular materials, including p-conjugated small molecules, polymers, and graphene, fabrication of related devices, including field-effect transistors and molecular electronics, and investigation of their electronic properties. He has published more than 600 papers in SCI journals (in which, over 140 of papers with IF>10), cited by other researchers for more than 30,000 times with an h-index >80. He was recognized as “Highly Cited Researchers” by Thomson Reuters in Materials Science from 2014 to 2018. In addition, he has obtained 70 of granted patents, published three books and 18 book chapters. He received the National Natural Science Award (2nd grade) in 2007 and 2016, and Beijing Science and Technology Award in 2017 (1st grade).
The University of Tokyo
Solar Hydrogen Production by Photocatalytic Water Splitting Panel
Prof. Kazunari Domen received BSc (1976), MSc (1979), and PhD (1982) honors in chemistry from the University of Tokyo. He joined Chemical Resources Laboratory, Tokyo Institute of Technology, in 1982 as Assistant Professor and was promoted to Associate Professor in 1990 and Professor in 1996, having moved to the University of Tokyo as Professor in 2004. He has been studying on overall water splitting reactions on heterogeneous photocatalysts to generate clean and recyclable hydrogen. He has been cross-appointed to Center for Energy & Environmental Science of Shinshu University as a Special Contract Professor since 2017.
Sunlight-driven photocatalytic water splitting has attracted much attention as a means of renewable hydrogen production on a large scale.1 A solar-to-hydrogen energy conversion efficiency (STH) of 5% or higher is necessary to make the process feasible. The scalability of water splitting systems is another important consideration. Development of particulate photocatalysts driving overall water splitting efficiently has a significant impact because such systems can be spread over large areas using inexpensive solution processes. The author’s group has developed photocatalyst sheets consisting of La- and Rh-codoped SrTiO3:La,Rh and Mo-doped BiVO4 embedded into a conductor layer by particle transfer for Z-scheme water splitting.2 The photocatalyst sheet splits water efficiently because the conductor layer transfers photogenerated electrons between photocatalyst particles effectively. The photocatalyst sheet based on a carbon conductor exhibits a STH of 1.0% at an ambient pressure, which is outstanding among particulate photocatalyst systems. The author’s group has also been developing panel reactors that accommodate photocatalyst sheets effectively in view of large-scale application.3 Al-doped SrTiO3 photocatalyst sheets contained in a panel reactor split water and release gas bubbles at a rate corresponding to a STH of 10% under intense UV illumination even when the water depth is merely 1 mm. A 1-m2-sized photocatalyst panel reactor splits water under natural sunlight irradiation without a significant loss of the intrinsic activity of the photocatalyst sheets.
Karlsruhe Institute of Technology (KIT) Germany
Herbert Gleiter received in 1966 his Ph.D. in Physics at the University of Stuttgart. Between 1966 and 1971 he joined Harvard University, MIT and Bell Laboratories as a Post Doctoral Fellow or Visiting Scientist, cooperating with B. Chalmers, D. Turnbull, E. Orowan and A. Argon. In 1970 he was awarded a D.Sc. Degree by the University of Bochum and in 1971, he was appointed to the Chair Professorship in Materials Science at this University. In 1973 he was offered and accepted a position as a Professor and of the Director of the Institute of Materials Science of the University of Saarbuecken, Germany. In 1987 he became the Founding Director of the Institute of New Materials (INM) at the same University. This institute is today one of the most productive and successful research centers in the area of Material Science in Germany. In 1994 he accepted the position of the President of the Research Center of Karlsruhe (FZK), Germany’s largest National Laboratory. In this function, he founded the Synchrotron Facility (ANKA) of the FZK, expanded the neutrino research activities to a large international cooperation and founded - in 1998 - the Institute of Nanotechnology (INT) of the Research Center Karlsruhe. At present he is one of the Institute Professors of the INT. Since 2012 he is also the Director of the “Herbert Gleiter Institute of Nanoscience” at the Nanjing University of Science and Technology. Professor Herbert Gleiter is considered today to be one of the scientists who initiated and pioneered nanotechnology. By the end of the 70’s he and his research group opened the way to a new kind of materials, called today nano-crystalline materials. In fact, today more than 800 papers are published annually in this new area of Materials Science and about 6 to 8 international conferences on nano-materials are organized every year. The field nano-materials keeps expanding at a remarkable rate: In 2011 more than 80 000 publications in this field were retrieved by the Web of Science, and according to a recent study of the German Government, the annual value of the products based on nano-materials is beyond 2 billion US$ with a growth rate of about 15 to 20% per year. In recent years, Herbert Gleiter expanded this field of Materials Science by developing nanostructured non-crystalline materials that are called today nano-glasses. It is the attractive perspective of these nano-glasses that they have the potential to open the way to a world of new technologies. These new technologies – based on nano-glasses – differ from today’s technologies that are primarily based on crystalline materials such as metals, semiconductors or ceramics. The reason why nano-glasses permit the development of a new world of technologies is that their properties differ from the properties of the crystalline materials available today because nano-glasses can be produced with atomic structures and with chemical compositions that cannot be generated in the form of the crystalline materials or in the form of the glassy materials we have today. The new properties of nano-glasses result from their novel atomic structures and/or their novel chemical compositions. The utilization of these new properties permits the development of technologies that could not be developed in the past by utilizing crystalline materials. In other words, nano-glasses may open the way into a “glass age. The new technologies of this “glass age” would be based on the new properties of nano-glasses, similar to the bronze or iron age that were based on the new properties of bronze or iron when they were discovered. Very recently, Herbert Gleiter and his group have started to apply methods of nanotechnology to probe conceivable application limits of today’s Quantum Physics to systems of macroscopic size e.g. to viruses or to clusters consisting of many thousand atoms. During his career he received more than forty prizes and awards among them are the Leibniz Prize, the Max Planck Prize, the Helmholtz Medal, the Cothenius Medal, which is the highest award of the German National Academy of Sciences, six Honorary Doctor Degrees and several Honorary Professorships. Since 1998 he is a member of the German National Academy of Science, Leopoldina. Between 2007 and 2015 he served as one of the Members of the Presidium of this Academy. In addition to this functions in the Leopoldina, he is an elected member of ten National Academies of Science and/or Engineering in Europe and world-wide e.g. of the American Academy of Arts and Sciences, the US National Academy of Engineering, the US National Academy of Inventors. the European Academy of Arts and Science. the Indian National Academy of Sciences, the Indian National Academy of Engineering, the European Academy of Science and Arts and the Academia Europaea
Prof. Alain Dufresne is Professor in Biomaterials at Grenoble INP. He received his PhD in 1991 from INSA Toulouse and was then Post-doc at Polytechnique Montreal, and Lecturer at INSA Lyon. He was appointed Associate Professor in 1993, and then Professor in 2001, at Grenoble University. He is since 2003 Professor at Grenoble INP. His research interests focus on the processing and characterization of nanocomposites from renewable resources. He is one of the pioneers in incorporating nanocellulose as a reinforcing agent in composite. He has been visiting Professor at UFRJ (Brazil), Embrapa Fortaleza (Brazil), and UKM (Malaysia). He has published +280 peer-reviewed papers and holds 8 patents. He received the 2016 International Nanotechnology Division Award and FiberLean® Technologies Prize awarded by TAPPI for outstanding achievement in the field of nanocellulose. He was in the 2016 top 300 most cited researchers in materials science and engineering (Elsevier Scopus Data) and was named a Highly Cited Researcher for 2018 (Web of Science Clarivate Analytics).
Koh-hei Nitta has received his Ph.D. in polymer physics from Kyoto University (1988). He joined the research center of Mitsubishi Chemical Co. (1988-1993) and he became an associate professor of Japan Advanced Institute of Science and Technology (1993-2003). He has been a full professor in Polymer Physics, Institute of Science and Engineering, Kanazawa University, Japan since 2004. He was awarded the Society of Rheology Japan Award for 2017, the Best paper award in Mathematics from ScieTech 2015, 2010 Outstanding research award from Filler Society of Japan, and 2001 Research Award from Japan Society of Rheology. His research interests: Structure and properties of polymer solids, Fracture and failure behavior, Mathematical chemistry.
Advanced new materials and technologies to meet energy and environmental challenges
Guocai Chai is the professor in Engineering Materials at Linköping University, Sweden, and the global group principle expert at Sandvik group, Sweden. His research areas are material design and developments, mainly the correlations between microstructures and mechanical properties. He graduated at University of Science and Technology, Beijing in 1982, and got PhD at Stockholm University in 1994, and then worked as a postdoc at Windsor University, Canada. He joint Sandvik in 1997 andhas parallel been working as adjunct professor at Linköping University from 2006. He is the board member of the Mechanics Society, Swedish Royal Academy of Science, the board member of Swedish Society for Materials and Technology, the management committee member of the European creep collaboration committee; the member of the technical expert group of the EU Research Funding for Coal and Steel. He has published more than 212 papers, two books, two monographs and three chapters/overviews in three books, and delivered more than42 plenary, keynote and invited lectures at international conferences. He has been awarded many patents and received the Howard F. Taylor Award of the American Foundryman’s Society in 1992. He was the nominees for the “Kami Prize” between 2012-2015, and the Wilhelm Haglund Medal 2015 and 2016.
Advanced Materials and Technologies - PROMATECH
Nano-mechanical testing of advanced ceramics
Dr.Jan Dusza is a head of the Centre for Advanced Materials and Technologies - PROMATECH, Slovakia.His research activities Microstructure and mechanical properties of silicon nitride and silicon carbide based monolithic ceramics, ceramic matrix composites, nano-composites, layered composites and coatings; High temperature characteristics of brittle materials / creep, slow crack growth, oxidation, etc; Fractographic failure analysis of brittle materials; Nano-mechanical testing of advanced ceramics.Jan Dusza is published more than 300 publications.
The deformation and damage characteristics of differently oriented WC grains/crystals in WC – Co, Si3N4 grains/crystals in reaction bonded Si3N4 system and ZrB2 grains/crystals in ZrB2 polycrystal were investigated. Depth-sensing nano-indentation and scratch tests of grains and micro-compression tests of micropillars prepared by focused ion beam from oriented facets of grains were studied. Electron backscatter diffraction (EBSD), atomic force microscopy (AFM) and scanning electron microscopy (SEM) investigations were performed to determine the grain orientation and to study the surface morphology and the resulting deformation and damage mechanisms around the indents and in micropillars. The hardness and scratch resistance of the differently orientated grains showed significant angle dependence from the basal towards the prismatic directions. A strong influence of the grains orientation on compressive yield stress and rupture stress values was found during the micropillar test, too. The active slip systems for individual ceramics have been recognized. The different properties of the basal and prismatic planes was found to be connected with the different deformation mechanisms – slip and dislocation activities.
Roma Tre University, Italy
Built Heritage: Diagnostic and Uncertainties in the Structural Assessment
Silvia Santini has a PhD from the University of Roma La Sapienza, then she was Research Fellow at the University of California in Berkeley. She is Professor of Structural Engineering at the Roma Tre University, where she is the Director of PRiSMa Lab and a member of PhD Scientific Board in Architecture: Innovation and Cultural Heritage. She is active in the MAECI project for Cultural Heritage preservation in Salvador and she is responsible for joint projects with China. Her research expertise is on theoretical and experimental evaluation of existing structures with emphasis on earthquake protection, repairing and retrofitting by FRP including code calibration.
The increasing attention to preserve the built heritage all over the world, is raising the issue of developing a strategy for its management and maintenance involving conservation and sustainable aspects. In general, the structural assessment of historical constructions involves the authenticity criteria and the principles of minimum intervention and reversibility. Diagnostic phase, starting from data acquired on geometry and materials with their state of conservation, is a crucial step on structural safety evaluation, especially in monitoring and maintenance processes as well as in rehabilitation design. A key challenge is looking for simpler, non invasive and more reliable techniques to measure the mechanical properties of materials, as resistance and resilience to failure, paying attention to the treatment of the uncertainties as required by the more recent codes. The materials that shapes historical buildings suffers from the influence of the time, the environmental conditions and workmanships with reducing of the nominal properties of the elements. At present, ways to investigate the properties of existing elements consist in non-destructive NDT measures (ultrasonic velocity, sclerometric tests, resistographic measurements, endoscopy, sonic tomography) or destructive tests DT (mainly compression, bending and shear test) when possible. Results on relevant existing buildings, in traditional materials as masonry, reinforced concrete and timber are presented and discussed. The experimental campaign was developed at the PRiSMa Lab (PRoof testing in Structures and Materials) of the Department of Architecture - Roma Tre University where all tests, involving NDT and DT measures, are carried out in lab and in situ.
Central South University
Functional design of high-performance clay mineral materials
Liangjie Fu is an Associate Professor in the Department of Inorganic Materials at Central South University. He received his Ph.D. in Materials Science at Central South University (2014). He was a postdoctoral fellow at the Peter A. Rock Thermochemistry Laboratory and NEAT ORU at the University of California, Davis (2015-2017). His research mainly focuses on the synthesis and theoretical study of novel mineral materials (mainly clay minerals), metal oxides and other functional materials in the areas of catalysis, energy, adsorption and drug delivery. He received the Science and Technology Award from China Building Materials Federation in 2018 (1st grade). He is the Deputy Director of International Scientific and Technological Cooperation Base of Mineral Materials in Hunan province, China.
Based on theoretical calculations and experimental results, the authors’ group has been working on the functional design of high-performance clay mineral materials in the area of catalysis, energy, adsorption and drug delivery. The formation of oxygen vacancies is one key factor that can improve the electronic and catalytic properties of metal oxides, and there are still challenges to lower the formation energy of oxygen vacancies at the interface structure in novel nanocomposites. It is found that clay minerals, with plenty of hydroxyl groups, can induce the formation of oxygen vacancies in metal oxide catalysts by interface bonding. According to DFT results, kaolinite is shown to hinder the surface dehydration process of Co3O4 and enhance the charge transfer process at the interface by the highly diffusible protons. Experimental results confirm that reduced Co3O4 is easily produced since kaolinite enhances the formation of oxygen vacancies and divalent cobalt on Co3O4 surface. This nanocomposite exhibits enhanced catalytic and electrocatalytic performances, which indicated an easy way to design efficient clay-based catalysts. During the recent decades, considerable efforts have been made to design advanced materials for the removal of heavy metal ions in water. Heavy metals pollution in waters is a serious global environmental problem due to their toxicity and carcinogenicity. Novel two-dimensional (2D) nanosheets, derived from the wide variety of traditional materials, have emerged as some of the most promising candidates for heavy metals purification. We summarized their advantages over traditional materials and limitations in practical applications, along with some perspectives on interface design of 2D adsorption materials for future work.
Two-dimensional materials for multifunctional applications
Dr. Hongwei Zhu is a Professor of School of Materials Science and Engineering, Tsinghua University. He received his B.S. degree in Mechanical Engineering (1998) and Ph.D. degree in Materials Processing Engineering (2003) at Tsinghua University. After Post Doc. studies in Japan and USA, he began his independent career as a faculty member at Tsinghua University (2008~present). His research involves multi-scale synthesis and assembly, characterizations and applications of materials. He has authored 3 books and 10+ invited book chapters, received 20+ patents and published 200+ papers with a H-index of 61.
Shanghai Advanced Research Institute
Gaofeng Zeng received his B.S. in Chemical Engineering from Dalian University of Technology (DUT) and his doctoral degree in Industrial Catalysis from Dalian Institute of Chemical Physics (DICP), CAS. Then he worked as a postdocat Advanced Membrane and Porous Materials Center, King Abdullah University of Science and Technology (KAUST), Saudi Arabia. He joined CAS Key Laboratory of Low-carbon Conversion Sci & Eng, SARIas a professor in 2012. His research interests cover inorganic membranes, membrane reactors and catalytic oxidation of low carbon molecules. He has published more than 50 peer-reviewed papers on the journals like Nature Commun, Adv Mater, J Mater Chem A, Chem Commun and J Membr Sci. He applied more than 30 patents, in which 7 of them have been issued. He is the principal investigator of the research projects sponsored by NSFC, CAS, local government and giant companies. He became the member of the Youth Innovation Promotion Association of CAS in 2015.
Materia Nova reserach center
Development of flame-retardant polymers by reactive pathway
Dr.Fouad LAOUTID obtained a master degree in material science from University of Montpellier in 1999. He received his PhD degree from University of Montpellier / Ecole des Mines d’Alès (France) in 2003 and joined Materia Nova research center in 2006. After his PhD, he has worked at the technical incubator of Ecole des Mines d’Alès in 2003 on the development of fire-resistant polyurethane foam before joining Ecole des Mines d’Alès in 2004 as a lecturer. He is currently R&D Programe Manager of the polymeric and composite unit. His research interests concern the development of sustainable flame-retardant polymeric materials, including biobased materials, (nano)composites and polymer blends. He has in charge several academic and industrial research projects.Dr Laoutid obtained a “Habilitation à Diriger des Recherches” in polymer chemistry in 2016 at the University of Montpellier. He is Vice-President of the French Chemical Society Group "Thermal degradation and fire behavior of organic materials" since 06/2015.
Université Grenoble Alpes
Innovative Design of Efficient La2-xPrxNiO4+δ-based Cathode for Solid Oxide Fuel Cells
Elisabeth Djurado is a Full Professor of Materials Science at Université Grenoble Alpes in France since 1990. She has completed her Ph.D from Blaise Pascal University at ClermontFerrand, France in 1988 in the domain of fluorides. Throughout her career, she was Reasearch Scholar at University of Pennsylvania (1989-1990) in the domain of superconductors. Her main interests in LEPMI include the elaboration and the structural/microstructural and electrochemical investigations of ceramics and interfaces for solid state ionics and especially for solid oxide cells at intermediate temperature. She has published more than 100 papers in international peer-reviewed journals.
Solid oxide fuel cells operating at intermediate temperature (~600 °C) are efficient energyconversion systems for electrical power generation. In order to design novel optimized cathodes with improved mixed ionic and electronic conductivity properties for Intermediate Temperature Solid Oxide Fuel Cells (IT-SOFC), it is of high importance to control (i) the electrode microstructure and composition to obtain large surface areas, increasing the number of active sites for the oxygen reduction reaction (ORR), (ii) the electrode/electrolyte interface to enhance the charge transfer. In this talk, layered perovskite-related oxides, such as Ln2NiO4+δ (abbreviated as LnNO; with Ln = La, Pr) are deposited on Ce0.9Gd0.1O2−(CGO) using screen printing (SP) and electrostatic spray deposition (ESD), a non-conventional fabrication technique for obtaining unique nanostructured cathodes. The role of the electrode/electrolyte interface has been evaluated on the cathodic performance by impedance spectroscopy using (i) a dense thin (~100 nm) pure LnNO sub-layer and (ii) a thicker (~3 m) porous composite CGO/LnNO sublayer. A significant improvement in polarization resistance (Rpol) from 0.42 to 0.16 and from 0.08 to 0.04 Ω cm2 is obtained at 600 °C for LaNO and PrNO, respectively, for the triple layered electrode based on the composite sub-layer. To conclude, the LnNO-CGO composite sublayer plays an important role in enhancing the electrochemical properties of these cathodes leading to the lowest Rpol values available in the literature for these compositions, to the best of our knowledge.
Gansu Academy of Sciences
A new technique for mass production of metal nano-powders
Dr Yan obtained his doctorate in material physics at the Beijing Institute of Physics of Chinese Academy of Sciences in 1994. After He finished his research on thin film materials as two post doctorates in KFA of Germany and Nanyang Technology of University of Singapore, respectively, he joined the Department of Physics, Lanzhou University of China in 1998, where he was appointed as a director of institute for plasma and metal materials, and the research on nano-materials was carried out. He did his study as a visit scholar at Duke University of USA from August to December in 2006. He was transferred to Gansu Academy of Sciences of China as Vice President and established the Institute of Nanotechnology Application in 2012. Where, he directed his research on production and application of metal nano-powders for various fields. Here, he invented a new technology for preparation various kinds of metal nano-powders with high quality in a large-scale in the international for the first time.
In the past decades, the research of nanomaterials has been still growing. Especially, the research of metal nano-powder materials, due to its wide application and superior performance, has made great progress. However, the high cost of preparation of existing metal nano-powders, the high price of pure metal nano-powders restricts its large-scale use in various fields. After nearly 20 years of continuous research and development, our research group has developed a new technology (MPNP) which could prepared various metal nano-powders with high quality in large quantities. Using this technology, we have prepared dozens of metal and its compounds nano-powders, and carried out their research in related application fields, and obtained some useful results.
Prof. Shunsuke Tanaka received his Bachelor’s degree in Chemical Engineering from Doshisha University in 2001. He earned a Master’s degree in Chemical Engineering from Osaka University in 2002 while studying ordered mesoporous silica films for low-k and then earned a Doctorate in Chemical Engineering in 2005. In parallel with his doctoral research, he received a JSPS Research Fellowship with which he focused on the self-assembly of nanostructured thin films. In 2005, he joined the School of Chemical Engineering at Purdue University. In 2006, he joined the Department of Chemical Engineering at Kansai University. He spent a year on sabbatical, 2014 to 2015, at VrijeUniversiteit Brussel in Belgium. His research publications have garnered over 3500 citations with an h-index of 33. He has received the SCEJ Award for Outstanding Young Researcher Winner (in 2010) and the Best Reviewers Award (in 2017) from The Society of Chemical Engineers, Japan, and the Calgon Carbon Japan Award (in 2017) from The Japan Society of Adsorption, and the Young Scientist Award (in 2018) from The Membrane Society of Japan, and Yazaki Academic Award (in 2019) from Yazaki Memorial Foundation for Science and Technology. His research and teaching interests is in development of nanoporous materials with ordered crystalline structure and control of nanostructure and morphology such as thin films, membranes, monodispersed particles and shaped powders. Currently he is focused on CO2 capture, biofuel purification, liquid phase and gas phase separations, membrane separation and photoreaction using zeolite, metal organic framework/porous coordination polymer and mesoporous solids.
Aitor Larrañaga Varga
University of the Basque Country
X Ray Diffraction for Nanomaterials Characterization
Dr. Aitor Larrañaga Varga is faculty at University of the Basque Country, Spain. Dr. Aitor Specialization in material characterization techniques and results analysis. X-ray diffraction; not environment measurements, size-strain, quantification, full profile analysis, texture, stress, orientation, grazing incidente, micro-diffraction, small angle X-ray scattering, reflectometry. Material and components, structure optimization.More than 80 international Publications (ISI Web of Knowledge), Open Access Papers; Chapters of books “Magnetic Materials: Research, Technology and Applications”, “Advances in Crystallization Processes” “Materials and technologies for Energy Efficiency” “Magnetic Materials Based Biosensors”. More than 110 Communications to National or International conferences. Participation in national (7) Basque Government (8) and University (2) research projects. Supervision of PhD thesis.
Integrated in the General Research Services of the University of the Basque Country, UPV/EHU, the X-ray Unit, provides the possibility to study single crystals, polycrystalline samples or amorphous materials, under a wide range of conditions. The performance of this unit covers all the aspects concerning diffraction (XRD), fluorescence (XRF) and photoelectron spectroscopy (XPS). The available equipment enables structural studies starting from diffraction data of polycrystalline materials. This technique allows us to identify the crystalline phases presented in the samples, crystal nano-size estimation, size/strain analysis, particle morphology or structural mean parameters study. The full profile simulation could give us all the structural information, perhaps compositional results and sometimes quantitative analysis of nano-particles. In the other hand different equipments and configuration implemented in the service give us the possibility to; make high and low temperature measurements, nano-layer thickness calculations, obtain deepness gradient information, texture analysis, stress measurements, crystal orientation, micro-diffraction, SAXS etc. The X-Ray Service supports basic and applied research through scientific and technical advice and the use of a high-performance infrastructure in materials analysis with applications in many areas of knowledge.
State University of New York
Characterization of Polyaniline/Cellulose Acetate Nanocomposite Fabricated through Electrospinning
Jeanette Grande is currently a graduate student at the State University of New York - ESF under the Fulbright Graduate Student Program Scholarship. She is taking her Master's Degree in Paper Science and Engineering (Major in Process and Environmental Systems Engineering). She is a cum Laude graduate of Chemical Engineering (Major in Pulp and Paper Technology) from the University of the Philippines Los Baños. Immediately after graduation, she was hired as an instructor at the same university. She handles courses in Wood Chemistry, Wood Anatomy, Engineering Economics, and Pulp and Paper Technology. She is involved in different researches in the field of Functional Biomaterials, Nanocomposites, Bioplastics from Lignin, and Cement Hydration among others.
Flexible electronic devices are the demands of this generation, thus the birth of fiber-based electronic devices, also known as electronic textiles. This study dealt with the fabrication of conductive polyaniline/cellulose acetate (PANI/CA) nanocomposite through electrospinning. Electrospinning is one of the newest technology in producing superfine fibers within the nanoscale. The process works by allowing a solution to pass through a syringe to a metallic plate by means of high potential difference. As the solution traverses the distance from the needle to the plate, it stretches, gradually solidifies and separates into superfine fibers. Different concentrations of PANI in CA dissolved in DMF/acetone solution were electrospun at varying flowrates. The presence of characteristic functional groups of PANI in the FTIR spectra of the produced nanocomposites proved the embedment of PANI in CA. The highest conductivity recorded for the electrospun fibers was 0.005416 ± 0.000454 S/m while the smallest fiber diameter noted was 91.56 nm, both obtained from 0.1% PANI wt/v electrospun at 2 mL/h. Morphological characterization of the fabricated nanocomposite included fiber diameter and bead formation assessment. Statistical analysis showed that electrospinning flowrate has a highly significant effect on the conductivity of the nanocomposite while the concentration, and the interaction of flowrate and concentration have a very highly significant effect.
Tohoku University, Japan
Fabrication of Practical Nanomaterial Processing for Sustainable Development Goals (SDGs)
Yamato Hayashi received the PhD from Osaka University, Osaka, Japan. His research interests are in ecodesign for material processing (include nanocomposite, nanoparticles, and nanocoating), and its industrial applications (catalyst, antibiotic material, and electronics packaging, IoT materials, etc.). He is currently an associate professor with Tohoku University, Miyagi, Japan, and promoted many large-scale project (NEDO, JST) of the industry-academia-government collaboration in nanomaterial.
Now, susutainable nanomaterial processing is requested for practical application. Traditional nanomaterial processing have many problems, so it is difficult to use for practical use due to the negative spiral. Ecology and Economy synthesis is important in t high-throughput nanomaterial processing. There are some elements to achieve this synthesis. We developed a new metal nanoparticle related material fabrication method for Sustainable Development Goals (SDGs) . This new synthesis method is with the ultrasonic cleaner and microwave oven as a general-purpose device and the metal oxide and alcohol are used for the raw material. Because it is home appliance, these machines are cheap. Moreover, the oxide and alcohol generally are cheap without toxicity. We have synthesized metal nanoparticle related material in liquid-solid slurry by these machines. This new synthesis method is with the ultrasonic and microwave as non-equilibrium reactor and the metal oxide and alcohol based solvent are used for the raw material. We have synthesized metal nanoparticle related materials by ultrasound and microwave in liquid-solid slurry and controlled morphology of products. Ultrasound and microwave irradiation in liquid-solid process can be expected as chemical non-equilibrium and nonlinear reactors for metal nanoparticle related materials synthesis. The alcohol based solvent and the metal oxide powder are put in the beaker and only irradiated by ultrasound or microwave. The metal oxide simply was reduced into metal and morphology of metal nanoparticles was changed by various conditions. In presentation, we introduce some high-throughput nanomaterial processing applications (nanoparticle, nanowire, nanocomposite, nano FGM.) in details.