Dimitrov, Ivaylo

Hvilsted, Søren

Jankova Atanasova, Katja

Jannasch, Patric

Nielsen, Mads Møller

Takamuku, Shogo

Online Research Database In Technology

                       General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.  • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal   If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.     Downloaded from orbit.dtu.dk on: Dec 19, 2017Modification of Polysulfone for Proton Exchange MembranesNielsen, Mads Møller; Dimitrov, Ivaylo; Takamuku, Shogo; Jannasch, Patric; Jankova Atanasova, Katja ;Hvilsted, SørenPublication date:2011Link back to DTU OrbitCitation (APA):Nielsen, M. M., Dimitrov, I., Takamuku, S., Jannasch, P., Jankova Atanasova, K., & Hvilsted, S. (2011).Modification of Polysulfone for Proton Exchange Membranes. Poster session presented at EPF 5th summerschool: Fundamentals and Developments in Polymer Processing Science and Technology, Gargnano, Italy, .  Modification of Polysulfone for Proton Exchange Membranes Mads M. Nielsen1, Ivaylo Dimitrov1, Shogo Takamuku2, Patric Jannasch2,  Katja Jankova1, Søren Hvilsted1 1Department of Chemical and Biochemical Engineering, Danish Polymer Centre, Technical University of Denmark, Soltofts Plads 227, DK-2800 Kgs. Lyngby, Denmark 2Division of Polymer and Materials Chemistry, Lund University, P. O. Box 124, SE-221 00 Lund, Sweden mon@kt.dtu.dk; Tel.: +45 4525 6817; Fax: +45 4588 2161   The main hurdles on the field of Proton Exchange Membranes (PEM) in fuel cells (FC) are to obtain better durability,  and improved performance at >80 o C at a reduced cost1. The proton conductivity of state-of-the-art perfluorosulfonic acid (PFSA) type membranes like Nafion® generally decays at higher temperatures, where the PEMFC system is more beneficial2. An alternative backbone is the commercially polysulfone (PSU) Udel® with good chemical, thermal and mechanical as well as film forming properties - the latter is a feature that easily rules otherwise strong candidates out3. Introduction of sulfonic acid groups in PSU is performed by “click” chemistry or through grafting by Atom Transfer Radical Polymerization (ATRP) from a short spacer, expected to contribute to the segregation onto hydrophobic and hydrophilic domains. By combination of well defined precursor backbones with the quantitative “click” chemistry and the controlled ATRP the Ion Exchange Capacity (IEC) can be tuned.    Figure 1. The pursued ways to modify the PSU backbone: “clicking” two different small molecules onto the backbone at the same number of sites, (a-b) or at a different amount of sites (c) - or by ATRP of the same monomer to different chain lengths (d-e) and from a different macroinitiator (f).   References:  1 Y. Wang, K. S. Chen, J. Mishler, S. C. Cho, X. C. Adroher Appl. Energ. 88 (2011) 981-1007 2 J. A. Mader, B. C. Benicewicz Macromolecules 43 (2010) 6706-6715 3 I. Dimitrov, K. Jankova, S. Hvilsted J. Polym. Sci. Part A: Polym. Chem 46 (2008) 7827-7834; 48 (2010) 2044-2052 

Modification of Polysulfone for Proton Exchange Membranes

Nielsen, Mads M.

Jankova, Katja

Lund University Publications

Modification of polysulfone for proton exchange membranes

http://orbit.dtu.dk/ws/files/6338821/prod11323329087484.EPF_abstract%5B1%5D.pdf

Modification of Polysulfone for Proton Exchange Membranes

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