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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Hopmann, C.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2023Development of micro‐form‐fitted amorphous thermoplast/light metal hybrid components ; Entwicklung von mikroformschlüssig gefügten amorphen Thermoplast-Leichtmetall-Hybridbauteilencitations
- 2022Separation of reaction products from ex-situ mineral carbonation and utilization as a substitute in cement, paper, and rubber applicationscitations
- 2022Characterization and modeling cure- and pressure-dependent thermo-mechanical and shrinkage behavior of fast curing epoxy resinscitations
- 2021Visco-thermo-elastic simulation approach for prediction of cure-induced residual stresses in fiber reinforced compositescitations
- 2019Development of joining methods for highly filled Graphite/PP composite based bipolar plates for fuel cells: Adhesive joining and weldingcitations
- 2017Influence of graphite and SEBS addition on thermal and electrical conductivity and mechanical properties of polypropylene composites
- 2017Influence of residual stress on the adhesion and surface morphology of PECVD-coated polypropylenecitations
- 2016Development of a polymer composite with high electrical conductivity and improved impact strength for the application as bipolar platecitations
- 2016Development of a new production method for manufacturing of hybrid parts from metal and plasticscitations
- 2015Injection moulding of optical functional micro structures using laser structured, PVD-coated mould insertscitations
- 2011Manufacturing of micro-structured parts for mass production purposes
- 2011Meta-modeling for manufacturing processescitations
Places of action
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document
Development of joining methods for highly filled Graphite/PP composite based bipolar plates for fuel cells: Adhesive joining and welding
Abstract
Novel material solutions for bipolar plates in fuel cells require adapted ways of joining and sealing technologies. Safe and life time enduring leak-tight contacts must be achieved by automatic processes using reasonable joint forces. A proper sealing should manage such challenges as good ageing properties, excellent leaktightness, high thermal conductivity and low gas permeability. Hence in this work, adhesive bonding and welding are considered as suitable methods, which can fulfill the requirements mentioned above. Adhesive systems seem to be more easy to apply than conventional sealing (hand layed-up rubber gaskets), e.g. with automatic dispensers. Additionally, the properties of an adhesive joint can be enhanced by a process-specific surface pre-treatment. This work focuses on the characterization of adhesive systems and their joints with highly filled graphite composites. Mechanical properties of the joints were characterized through lap-shear tests. The influence of ageing caused by humidity or acidic solvent at increased temperature on the bond line properties as well as neat adhesive was examined. The thermal conductivities of neat adhesives and through the entire joint were examined. In order to improve above conductivities, roughening, substrate pre-heating, post-curing and various contact pressure weights were applied. Plasma treatment was chosen as surface pre-treatment method for improving substrate's surface energy. An alternative to bonding is plastic welding, which does not require the use of sealants and adhesives. Based on former study of influences of filler content on the welding process using ultrasonic, hot plate or infrared welding, a welding method for joining the graphite compounds was derived. ; acceptedVersion