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Document Type:Latin Dissertation
Language of Document:English
Record Number:54986
Doc. No:TL24940
Call number:‭1441066‬
Main Entry:Abdullah Saad Sultan
Title & Author:Characterizations of newly developed polymeric membrane materials for fuel cell applicationsAbdullah Saad Sultan
College:King Fahd University of Petroleum and Minerals (Saudi Arabia)
Date:2006
Degree:M.S.
student score:2006
Page No:190
Abstract:The search for high temperature membrane materials for fuel cell applications is a rapidly growing area of research. The advantages of operating at elevated temperatures include overcoming the catalyst limitations of the DMFC and improving the carbon monoxide tolerance of the reformate fueled PEM fuel cell, potentially reducing the size, cost and complexity of the fuel cell system. Polymeric membranes are widely used in fuel cell applications. Poly Ether Ether Ketone (PEEK) is generally used in proton exchange membrane (PEM) fuel cells. PEEK is usually sulfonated to improve its expected properties in terms of better wettability, higher water flux, higher antifouling capacity, better selectivity and increased solubility. In recent years, our research group developed low cost, high conducting and chemically stable composite membranes for PEM fuel cell by incorporation of powder inorganic boron phosphate (BPO4) into Sulfonated PEEK (SPEEK) polymer matrix and also by blending polyetherimide (PEI), polysulfone (PSU) into SPEEK separately. In this study, the thermal and rheological characterizations of these newly developed aromatic composite membranes were investigated. Thermal properties are expressed in term of the glass transition (Tg) and melting temperature (Tm), and oxidation temperature (To) while rheological characterization studies the effect of the degree of sulfonation, concentration of boron phosphate, polysulfone and polyetherimide in SPEEK on viscous and elastic properties of composite SPEEK. Generally, SPEEK and its blends showed good thermal stability up to ∼360°C where degradation starts to occur. Solution viscosity of SPEEK and its blends were measured and found to obey Fuoss & Strauss equation and showed strong charge interactions common for polyelectrolyte solutions. Moreover, scanning electron microscopy and X-ray diffraction were carried out. The influence of molecular structure, type of solvent and degree of sulfonation on the solution properties were examined.
Subject:Applied sciences; Electrical engineering; Energy; 0791:Energy; 0544:Electrical engineering
Added Entry:King Fahd University of Petroleum and Minerals (Saudi Arabia)