Investigation of Hygro-Thermal Strain in Polymer Electrolyte Membranes Using Optical Coherence Elastography

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dc.contributor.authorKeller, Victor
dc.contributor.supervisorDjilali, Nedjib
dc.contributor.supervisorWild, Peter Martin
dc.date.accessioned2014-08-12T22:33:27Z
dc.date.available2014-08-12T22:33:27Z
dc.date.copyright2014en_US
dc.date.issued2014-08-12
dc.degree.departmentDepartment of Mechanical Engineeringen_US
dc.degree.levelMaster of Applied Science M.A.Sc.en_US
dc.description.abstractThe work present in this thesis report introduces a novel non-destructive technique for experimentally measuring through thickness hygro-thermal strain of Nafion membranes though digital image correlation. An Optical Coherence Tomography (OCT) system was used to acquire images of a Nafion-TiO2 (titanium dioxide powder) composite membranes in a fuel cell like device. The proposed technique, commonly known as optical coherence elastography (OCE) makes use of the normalized correlation algorithm to calculate strain between two successive scans of different relative humidity step values. Different normalized correlation parameters were compared to measured results of PDMS-TiO2 phantoms in order to analyze accuracy. The effect of TiO2 on Nafion membranbes mechanical properties was further analysed by comparing the swelling behaviour of membranes with different concentrations. It has been found that Nafion undergoes approximately 25 – 30% more strain on the land section than on the channel section, regardless gas diffusion electrode (GDE) layer presence. Furthermore, it was shown that the overall strain on the material decrease by approximately 10% when GDE layers are present. Overall this work demonstrated how OCE is a viable technique for measuring through thickness strain distribution in Nafion composite membranes and has the potential to be implemented for non-destructive in situ measurements.en_US
dc.description.proquestcode0548en_US
dc.description.proquestemailkellerv@uvic.caen_US
dc.description.scholarlevelGraduateen_US
dc.identifier.urihttp://hdl.handle.net/1828/5549
dc.languageEnglisheng
dc.language.isoenen_US
dc.rights.tempAvailable to the World Wide Weben_US
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/*
dc.subjectFuel Cellen_US
dc.subjectPEMFCen_US
dc.subjectPolymer Electrolyte Membraneen_US
dc.subjectOptical Coherence Tomographyen_US
dc.subjectElastographyen_US
dc.subjectSpeckle trackingen_US
dc.subjectDigital image correlationen_US
dc.titleInvestigation of Hygro-Thermal Strain in Polymer Electrolyte Membranes Using Optical Coherence Elastographyen_US
dc.typeThesisen_US

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