时间：2019年9月6日（星期二）上午9：00
地点：材料科学与工程学院25号楼331会议室

报告摘要：
       Halloysite alumosilicate nanotubes with a 15 nm lumen, 50 nm external diameter, and length of 1-1.5 µm have been developed as an entrapment system for loading, storage, and controlled release of chemical agents (anticorrosion, flame-retardancy, biocides, drugs and proteins). Studies to enable the control of release rates from hours to days and months are being undertaken. By the formation of nanoshells over the nanotubes or by creation of smart caps at the tube ends it is possible to extend release rate. Halloysite forms stable aqueous colloids and is well admixable with polar and low polar plastics. Protective halloysite coatings and a self-healing approach have been tested for repair mechanisms through response activation by external impacts. Doping loaded clay nanotubes into polymeric matrix (polyurethane, polypropylene, siloxane, epoxy, etc.) provides sustained inhibitors’ release and this ceramic “skeleton” is enhancing the composite strength. Doping clay nanotubes into paint at 3-5 wt. % provides sustained release of anticorrosion agents resulting in 2-times longer metal protection as well as in 50-100 % increase in the coating strength and adhesivity. As well, double in flame-retardancy was reached. Biocompatible halloysite nanotubes allow for 10 wt. % loading with drugs and proteins preserving their activity and providing 10-50 hrs release time. Halloysite nanotubes are available in thousands of tons, and remain sophisticated and novel nanomaterials which can be used as smart nano-containers. Halloysite is also a green material and due to the fact that it is a natural product will not add risk to the environment.

附主讲人简介：
       Dr. Yuri M. Lvov is a Professor of Chemistry, T. Pipes Eminent Endowed Chair on Micro and Nanosystems at the Institute for Micromanufacturing, Louisiana Tech University. He earned his Ph.D. in Physical Chemistry (protein crystallography) from #1 Russian university, M. Lomonosov’s Moscow State University in 1979, then worked at the Institute of Crystallography, Russian Academy of Sciences where  got Doctor of Science in physics in 1991. After Soviet Union collapsed, he worked in the world famous research centers in Germany (Max Planck Institute for Colloids), Japan (National Institute of Materials Science, Tsukuba), and USA (Naval Research Laboratory, Washington DC). In 1999, Dr. Lvov came to the Institute for Micromanufacturing at LaTech from the Center for Biomolecular Science and Engineering, Naval Research Lab. 
       His area of specialization is nanotechnology including nanoassembly of ultrathin organized films, bio/nanocomposites, nano/construction of ordered shells on tiny templates (drug nanocapsules, shells on microbes and viruses), clay nanotubes for controlled release of anticorrosion, bioactive agents and drugs. Y. Lvov has 13 US, Australian and Japanese patents on nanoassembly. He was among pioneers of the polyelectrolyte layer-by-layer (LbL) assembly, - a nanotechnology method which, after his first papers in 1993, followed by many thousands publications by researchers all over the world. LbL nanoassembly already found industrial applications in HPLC, for eye lens modification, improvement of cellulose fiber for better fabric and paper, microcapsules for insulin sustained release, cancer drug nanocapsules, anticorrosion protection, and others. Yuri Lvov edited four books, published 24 book chapters, and 215 peer reviewed papers on nanosystems. Lvov’s total citation index is above 14,800 which is an outstanding result, and his h-index is 66.
       His NSF, NIH, NASA, DoE grants and industrial contracts exceeded $9 mln in the last ten years. In 2003, 2008, 2011, 2013 and 2016 he chaired American Chemical Society International Symposiums on Nanomaterials in New York, Philadelphia, Anaheim, New Orleans and San Diego. Y. Lvov was named the Louisiana State’s Top Researcher in New Technologies (2007), and in 2008 he got Best of Small Tech National Innovator Award in recognition of achievements in micro and nanotechnology. In 2014, Yuri Lvov was awarded with prestigious international A. von Humboldt Prize for lifetime achievements in nanochemistry. Dr. Lvov has been invited to present talks at more than 150 national or international scientific conferences and has delivered lectures at more than 60 major universities and companies. Y. Lvov is elected a member of US National Academy of Inventors and an honorable professor of Beijing University of Chemical Technology, China and Kazan Federal University, Russia.