ساخت صفحات دو قطبي بر پايه ماتريس پلي پروپيلن جهت كاربرد در پيل هاي سوختي پليمري

چكيده انگليسي :

Fabrication of Bipolar Plate Based on Polypropylene Matrix for Using in Polymer Fuell Cell Ali Adloo A adloo@ce iut ac ir Date of Submission Department of Chemical Engineering Isfahan University of Technology Isfahan Iran Degree M Sc Language Farsi Supervisor Morteza Sadeghi M Sadeghi@cc iut ac ir Abstract To use clean energy has been served as one of the main human concerns For this there have developed wide variety of approaches to generate clean energy Hydrogenous energy and using fuel cells are the best options for human Among the fuel cells the polymeric one has been extended considerably mostly due to its higher productivity as well as its function in low temperatures for different applications such as transportation and automobile application The bipolar plates are one of the most important parts of polymer fuel cells which have contribution in electron transferring are in different types like those of graphite metal and conducive polymer composites among others In the present research we dealt with generation of polypropylene based bipolar plates using the various electricity conducive additions like graphite graphene and two types of carbon blacks we also used polypropylene linked to maleic anhydride and polyethylene wax to improve addition particles diffusion properties The graphene was produced in respect to Hummer chemical reduction method Having been graphene was produced some tests including x ray diffraction infera red spectrometer and atomic force microscope were applied to evaluate the produced matter The x ray diffraction test indicated much more Cm tension vibration of Epoxy groups C O in wavenumber tension vibration of hydroxyl group C O in Cm tension vibration of Carbonyl Cm tension vibration of carboxyl groups C O in wavenumber groups C O in wavenumber range of Cm and tension vibration of O H groups in wavenumber interval of Cm for graphite oxide The most existed factors agents except for hydroxyl ones were reduced and converted into conjugated bonds having been reduction affected by hydrazine The atomic force microscope indicated that most plates are those have about nm or less thickness Polypropylene polymer fuel cells were considered as a background to generate bipolar plates The internal mixing device and compression molding methods were used to mixing melting and molding materials respectively To see effect of polypropylene linked to maleic anhydride and polyethylene wax on graphene particles diffusion in polypropylene the transmitting light microscope was used Results of the transmitting light microscope indicated that to apply polypropylene linked to maleic anhydride is much more effective on graphene particles diffusion mainly because of its polarity group The electrical conductivity and bending strength tests were used to evaluate required properties of produced polymer fuel cells bipolar the weighted carbon black of Akzonobel type with electrical conductivity of s cm was the best sample in electrical conductivity test The three point bending test was applied to deal with bending strength The best samples in terms of bending strength were weighted graphene To evaluate the composition morphology the scanning electron microscopic test was applied This test suggested that application of graphene might be located perpendicular to mold pressure while molding and leading to increased electricity conductivity paths due to its plate structure Keywords Bipolar plate polypropylene graphene electrical conductivity polymer fuel cell PDF created with pdfFactory trial version www pdffactory com

عدلو، علي

ساخت صفحات دو قطبي بر پايه ماتريس پلي پروپيلن جهت كاربرد در پيل هاي سوختي پليمري

گرافن , هدايت الكتريكي