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VERSION:2.0
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SUMMARY:Cancelled event - IMX Seminar Series - Co-continuous Nanostructure
 s in Charged Polymer Materials
DTSTART:20200420T131500
DTEND:20200420T141500
DTSTAMP:20260510T105857Z
UID:878962190dc75a8ef79c311658d2f5525db22ce49971a21cd9f5b351
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Timothy P. Lodge\, University of Minnesota\, USA\nNanost
 ructured materials with co-continuous structures\, in which each discrete 
 domain is independently interconnected\, can simultaneously optimize “or
 thogonal” properties such as ion transport and mechanical strength. Pote
 ntial applications include porous membranes\, fuel cells\, and rechargeabl
 e metal batteries. Block polymers have been exploited as templating agents
  to access such morphologies\, for example via ordered periodic phases suc
 h as the double gyroid\, or by polymerization-induced microphase separatio
 n. In such cases the conducting domains are typically ≤ 20 nm in size\, 
 which can compromise both mobility and strength. An alternate route involv
 es blending an A–B diblock copolymer with the constituent A and B homopo
 lymers\, leading to a disordered bicontinuous microemulsion (BmE) state. W
 e have shown that charge-free ternary A–B/A/B polymer blends universally
  self-assemble into the thermodynamically stable BmE phase\, albeit with c
 arefully designed molecular weights and compositions. The BmE displays glo
 bally disordered but locally correlated domains\, with tunable characteris
 tic length scales in the range of ca. 20–100 nm\, well beyond the domain
  sizes typically associated with pure diblocks. The interesting question t
 hat arises is whether this phase can also be accessed in blends containing
  charge\, where in general the intermolecular interactions are stronger an
 d more long-ranged. We are exploring this issue in two cases: an A–B/A/B
  ternary system with added salt\, and an A–B/A/B system in which one of 
 the polymers is ionomeric.\nBio: Tim Lodge graduated from Harvard in 1975 
 with a B.A. cum laude in Applied Mathematics. He completed his PhD in Chem
 istry at the University of Wisconsin in 1980\, and then spent 20 months as
  a National Research Council Postdoctoral Fellow at NIST. Since 1982 he ha
 s been on the Chemistry faculty at Minnesota\, and in 1995 he also became 
 a Professor of Chemical Engineering & Materials Science. In 2013 he was na
 med a Regents Professor\, the University’s highest academic rank.\nHe ha
 s been recognized with the American Physical Society (APS) Polymer Physics
  Prize (2004)\, the International Scientist Award from the Society of Poly
 mer Science\, Japan\, (2009)\, the 2010 Prize in Polymer Chemistry from th
 e American Chemical Society (ACS)\, and the Hermann Mark Award (2015) and 
 the Paul Flory Education Award (2018) of the ACS Division of Polymer Chemi
 stry. He has been elected to Fellowship in the American Association for th
 e Advancement of Science\, the APS\, the ACS\, and the Neutron Scattering 
 Society of America. In 2016 he was elected to the American Academy of Arts
  and Sciences.\nFrom 2001–2017 Tim served as the Editor-in-Chief of the 
 ACS journal Macromolecules. In 2011 he became the founding Editor for ACS 
 Macro Letters. He has served as Chair of the Division of Polymer Physics\,
  APS (1997–8)\, and as Chair of the Gordon Research Conferences on Collo
 idal\, Macromolecular and Polyelectrolyte Solutions (1998) and Polymer Phy
 sics (2000). Since 2005 he has been Director of the NSF-supported Material
 s Research Science & Engineering Center at Minnesota. He has authored or c
 o-authored over 450 papers in the field of polymer science\, and advised o
 r co-advised over 80 PhD students. His research interests center on the st
 ructure and dynamics of polymer liquids\, including solutions\, melts\, bl
 ends\, and block copolymers\, with particular emphases on self-assembling 
 systems using rheological\, scattering and microscopy techniques.\n 
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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