Dimitrov, Ivaylo

Hvilsted, Søren

Jankova Atanasova, Katja

Jannasch, Patric

Nielsen, Mads Møller

Takamuku, Shogo

Nielsen, Mads M.

Jankova, Katja

Lund University Publications

A principal route for modification of PSU intended for PEMs by “click” chemistry

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, 2017A Principal Route for Modification of PSU Intended for PEMs by "Click" ChemistryNielsen, 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). APrincipal Route for Modification of PSU Intended for PEMs by "Click" Chemistry. Poster session presented at2nd International Symposium - Frontiers in Polymer Science, Lyon, France, .    Title: A Principal Route for Modification of PSU Intended for PEMs by “Click” Chemistry  Authors & affiliations: 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 6819; Fax: +45 4588 2161  Abstract:  (Your abstract must use Normal style and must fit in this box.  Your abstract should be no longer than 300 words. The box will ‘expand’ over 2 pages as you add text/diagrams into it.)    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.     To obtain proton conductivity sulfonic acid (SA) groups are linked to the PSU by a Cu(I) catalyzed 1,3-cycloaddition of azides and terminal alkynes. Different monosulfonated compounds are used in order to investigate the influence of the structure between the SA and the backbone. Disulfonated compounds are used in obtaining more concentrated SA domains, and the quantitative azide-alkyne “click” reaction facilitates dendron structures, e.g. with four SA units linked to the same dendritic spacer. The final structure is also tuned through the use of various degrees of substitution of the backbone.    To the best of our knowledge the concept of obtaining proton conductivity of PSU PEMs via sulfonated dendrons prepared by “click” chemistry has not been presented before.  Figure 1. Different sulfonate structures are clicked onto the PSU backbone. Dendrons are made by “click” chemistry to increase the SA domains.   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 

A Principal Route for Modification of PSU Intended for PEMs by "Click" Chemistry

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A Principal Route for Modification of PSU Intended for PEMs by "Click" Chemistry

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