Title: Molecular Mechanisms of Simultaneous High Strength and Toughness in Continuous Nanofibers
Speaker: Prof. Yuris Dzenis
Time: May, 19 10:00
Venue: Hall 324, Building 2, North District Science and Technology Park, Wushan Campus,
[Abstract]
Classical manufacturing techniques of advanced polymer fibers rely on a combination of high polymer crystallinity and high degree of macromolecular alignment to achieve superior mechanical properties. As a consequence, high-performance fibers such as PPTA and UHMWPE possess high strength, but low strain to failure and toughness. 麻豆传媒 mechanical and structural analysis of electrospun nanofibers (NFs) in the ultrafine (50-250 nm) diameter range showed extraordinary simultaneous improvements in strength, modulus, and toughness. The finest nanofilaments exhibited strength on the par with that of advanced structural fibers, while exceeding their toughness by over an order of magnitude. This lecture will discuss supramolecular mechanisms of such an unusual mechanical behavior as well as review methods of structural characterization of ultrafine continuous nanofibers. Prospects and impacts on wellbeing and sustainability of future textiles will be discussed
Annouced by the School of Molecular Science and Engineering
