Results 171 to 180 of about 6,237 (218)
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Desalination, 2009
Polyethersulfone (PES)/poly (ether ether ketone) (SPEEK) blends nanofiltration membrane at different SPEEK contents were prepared using a simple dry-jet wet spinning technique. The SPEEK polymer with fixed sulfonation degree was used for membrane preparation and characterized using FTIR and nuclear magnetic resonance (NMR) spectrometer.
Woei-Jye Lau, A.F. Ismail
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Polyethersulfone (PES)/poly (ether ether ketone) (SPEEK) blends nanofiltration membrane at different SPEEK contents were prepared using a simple dry-jet wet spinning technique. The SPEEK polymer with fixed sulfonation degree was used for membrane preparation and characterized using FTIR and nuclear magnetic resonance (NMR) spectrometer.
Woei-Jye Lau, A.F. Ismail
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ECS Transactions, 2007
The choice of polyelectrolyte in the catalyst layer is an important consideration in the formation and efficacy of the triple phase boundary. It also influences the stability of the electrolyte/electrode interface for long term fuel cell performance. The polyelectrolyte composition in the electrode has to be optimum for higher Pt utilization and hence
Satheesh Kumar Sambandam, V. Ramani
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The choice of polyelectrolyte in the catalyst layer is an important consideration in the formation and efficacy of the triple phase boundary. It also influences the stability of the electrolyte/electrode interface for long term fuel cell performance. The polyelectrolyte composition in the electrode has to be optimum for higher Pt utilization and hence
Satheesh Kumar Sambandam, V. Ramani
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Mesoscale Simulation on the Hydrated Morphologies of SPEEK Membrane
Macromolecular Theory and Simulations, 2021AbstractProton transport in proton exchange membrane is considered to depend on the hydrophilic domain formed by the microphase separation between hydrophobic and hydrophilic segments of the membrane. Therefore, the study of hydrated morphologies is crucial to understand proton transport.
Jihao Wang +5 more
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Mixed conductive blends of SPEEK/PANI
Solid State Ionics, 2005Abstract Membranes were obtained by solvent evaporation from 70% sulfonated poly(ether ether ketone) and polyaniline in N-methyl-2-pyrrolidone [NMP] or N,N-dimethyl formamide [DMF]. SPEEK/PANI membranes were studied by UV–Vis spectroscopy, ion-exchange capacity, ionic and electronic conductivity and thermal properties, in order to observe the SPEEK ...
Jerusa Roeder +3 more
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Hybrid SPEEK/Phosphonatedsilsesquioxanes membranes for PEMFC
Nanomaterials and Energy, 2012In this work, the production and characterization of hybrid membranes of sulfonated poly(ether-ether-ketone; SPEEK) and phosphonated copolysilsesquioxanes (PCs) and its application in proton exchange membrane fuel cell (PEMFC) were studied. To improve the proton conduction and thermal stability of the polymer SPEEK, PCs were synthesized from ...
Kelen Rossi de Aguiar +7 more
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Structures and Properties of the Coating for SPEEK/WPU
Applied Mechanics and Materials, 2011SPEEK can be dispersed in water as well as WPU, so the coating for SPEEK/WPU can be obtained in the water, and its films were investigated on the structures and properties by SEM, TGA, Shore Durometer and so forth, the results show that SPEEK as a micro-phase can disperse in WPU phase, and there is a good thermal stability when the temperature is below
Jian Bing Chen, Qiang Guo
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Microstructure–Performance Relationships of sPEEK-Based Catalyst Layers
Journal of The Electrochemical Society, 2010Porous catalyst layers containing sulfonated polyetheretherketone (sPEEK, 1.4 meq g ―1 ) were deposited onto membranes to form catalyst-coated membranes. The catalyst layer properties, as a function of sPEEK content, were studied ex situ and in fuel cells.
Peron, Jennifer +4 more
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Journal of Applied Polymer Science, 2005
AbstractA study to evaluate the tensile mechanical properties of sulfonated poly(ether ether ketone) (SPEEK) and BPO4/SPEEK composite membranes has been carried out. It is aimed to give an assessment of these materials for applications in proton exchange membrane fuel cells.
A. Reyna‐Valencia +2 more
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AbstractA study to evaluate the tensile mechanical properties of sulfonated poly(ether ether ketone) (SPEEK) and BPO4/SPEEK composite membranes has been carried out. It is aimed to give an assessment of these materials for applications in proton exchange membrane fuel cells.
A. Reyna‐Valencia +2 more
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Hydration Behaviour of Sufonated Polyetheretherketone (SPEEK) Membranes
Key Engineering Materials, 2018Polymer electrolyte membranes (PEM) have a potential to become power sources in automotive industry and other household applications. PEM such as sulfonated polyetheretherketone (SPEEK) have acceptable operating temperature range but proton conductivity is dependent on amount of sulfonic groups attached to the polymer backbone (degree of sulfonation ...
Kaspars Veldre +3 more
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Journal of Membrane Science, 2009
Abstract Sulfonated poly(ether ether ketone)s (SPEEKs) with different sulfonation degrees (DS) were synthesized and characterized using FTIR and NMR for the preparation of blend nanofiltration (NF) membranes. Blends of polyethersulfone and SPEEK at various SPEEK concentrations and various DS were prepared by a simple dry-jet wet spinning technique ...
Lau, W. J., Ismail, Ahmad Fauzi
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Abstract Sulfonated poly(ether ether ketone)s (SPEEKs) with different sulfonation degrees (DS) were synthesized and characterized using FTIR and NMR for the preparation of blend nanofiltration (NF) membranes. Blends of polyethersulfone and SPEEK at various SPEEK concentrations and various DS were prepared by a simple dry-jet wet spinning technique ...
Lau, W. J., Ismail, Ahmad Fauzi
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