主讲人：R. H. Baughman 教授
主讲人介绍：Ray Baughman became the Robert A. Welch Professor of Chemistry and Director of the Nano-Tech Institute at the University of Texas in Dallas in August 2001, after 31 years in industry. He is a Member of The National Academy of Engineering and The Academy of Medicine, Engineering and Science of Texas, the EU Academy of Sciences, a foreign member of the European Academy of Sciences, a Fellow of the Royal Society of Chemistry, the National Academy of Inventors, and the American Physical Society, an Academician of The Russian Academy of Natural Sciences, an honorary professor of 7 universities in China, and is on editorial or advisory boards of Science and other journals. Ray has 82 issued US patents and 415 refereed publications, with over 32,580 citations and an H-index of 84. In recent sever years, he has received the SGL Carbon Award of the American Carbon Society (2013), the Tech Titans Technology Inventors Award (2015), the 2015 Inventor Award for Energy Harvesting Materials and Systems, and the R&D 100 Gold Award for Market Disruptor Product (2015). He was listed 30th in the Top 100 Material Scientists of the Decade (2000-2010). The Baughman laboratory was established in his honor in China in 2014 at the Jiangnan Graphene Research Institute in Changzhou.
主要内容:The design, fabrication, and performance of multifunctional yarns and fibers for energy harvesting, energy storage, and actuation will be discussed. Our biscrolling technology can be used to trap up to 95 wt % of a functional guest in the helical corridors of nanofiber yarns that are weavable, braidable, sewable, and knot-able without sacrificing guest functionality. When used as large-stroke artificial muscles, these yarns are twisted until they fully coil, and in this coiled state they can deliver tensile strokes exceeding 40% and generate contractile stresses, gravimetric work densities, and gravimetric power densities that are 230, 65, and 95 times that of natural muscle, respectively. Depending upon the relative chirality of yarn and coil, homochiral and heterochiral muscles are obtained, which respectively contract and expand when yarn volume increases. Related electrochemical twistron mechanical energy harvesters will also be described, which are electrochemical muscles operated in reverse. Without requiring an external power source to provide a bias voltage, these twistrons can generate 250 watts per kilogram of peak electrical power when cycled up to 30 hertz, as well as over 41 joules per kilogram of electrical energy per mechanical cycle, when normalized to harvester yarn weight. All solid-state twistrons will be described that are woven into textiles to generate electricity from body movement.