Eintrag in der Universitätsbibliographie der TU Chemnitz
Volltext zugänglich unter
URN: urn:nbn:de:bsz:ch1-qucosa2-935770
Künzel-Tenner, Andy
Sommer, Michael (Prof. Dr. rer. nat.) ; Goedel, Werner A. (Prof. Dr. rer. nat.) (Gutachter)
Sulfonated polyphenylenes based on Armstrong’s acid as proton conducting membranes for fuel cell applications
Sulfonierte Polyphenylene basierend auf Armstrong's Acid als protonenleitfähige Membranen für Brennstoffzellenanwendungen
Kurzfassung in englisch
Proton conducting membranes are a key component in fuel cell designs. Properties like proton conductivity, water uptake, ion exchange capacity and physiochemical stability dictate the performance and longevity of the complete fuel cell system. Designing a proton conductiting membrane takes several factors, such as monomer choice and their respective functionalization into account. Besides that, economically favourable reactions as well as environmental compability have to be considered. This work demonstrates the development of a fuel cell membrane material starting from broadly available, cost-efficient educts. Few reaction steps, also including cost-efficient reagents, have been employed in order to obtain a doubly sulfonated monomer based on naphthalene-1,5-disulfonic acid (Armstrong´s acid) suitable for polymerizations. Suzuki polycondensation of the given monomer partly yielded processable films for further investigation. A cost-efficient, atom-economic deprotection stategy was developed for sulfonated polyphenylenes, yielding proton conducting membranes. Further modification of the backbone structure, by incorporating an excess of hydrophobic meta,meta,meta-terphenylene units, led towards balanced properties of the material. The impact of polymer constitution, was investigated and discussed via the implementation of para,meta,para-substituted instead of meta,meta,meta-substituted terphenylene. Alternating and statistical copolymers including para,meta,para-substituted terphenylene were developed and investigated. The reported proton conducting membranes pose suitable and promising candidates for fuel cell applications.
| Universität: | Technische Universität Chemnitz | |
| Institut: | Professur Polymerchemie | |
| Fakultät: | Fakultät für Naturwissenschaften | |
| Dokumentart: | Dissertation | |
| Betreuer: | Sommer, Michael (Prof. Dr. rer. nat.) | |
| URL/URN: | https://nbn-resolving.org/urn:nbn:de:bsz:ch1-qucosa2-935770 | |
| SWD-Schlagwörter: | Brennstoffzelle , Polyphenylene , Protonentransfer | |
| Freie Schlagwörter (Englisch): | fuel cell , fuel cell membranes , polyphenylenes , armstrong’s acid , neopentyl sulfonates , thermal cross-linking , proton conducting membrane , proton exchange membrane | |
| DDC-Sachgruppe: | Chemie | |
| Sprache: | englisch | |
| Tag der mündlichen Prüfung | 27.08.2024 |
