Results 121 to 130 of about 963 (161)

Tensile mechanical properties of sulfonated poly(ether ether ketone) (SPEEK) and BPO₄/SPEEK membranes

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, S. Kaliaguine, M. Bousmina   +2 more
openaire   +1 more source

Hydration Behaviour of Sufonated Polyetheretherketone (SPEEK) Membranes

Key Engineering Materials, 2018
Polymer 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, Elīna Sala, Elīna Āboltiņa, Guntars Vaivars   +3 more
openaire   +1 more source

Theoretical studies on the morphological and electrical properties of blended PES/SPEEK nanofiltration membranes using different sulfonation degree of SPEEK

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
openaire   +2 more sources

Effect of TEOS Additive as Proton Exchange Membrane on SPEEK-PVA and SPEEK-PVA-Boric Acid Blend Membranes

2023
Bu çalışmada, proton değişim membranı olarak farklı kütlesel yüzdelerde (%1, %3 ve %5) TEOS katkılı SPEEK-PVA ve SPEEK-PVA-borik asit karışım membranları çözelti döküm yöntemiyle sentezlenmiştir. Sentezlenen membranlar FTIR, su tutma kapasitesi, şişme özelliği, boyut değişimi ve iyon değişim kapasitesi deneyleri ile karakterize edilmiştir.
YAĞIZATLI, Yavuz, ŞAHİN, Alpay, AR, İrfan   +2 more
openaire   +1 more source

SPEEK/Matrimid blend membranes for CO2 separation

Journal of Membrane Science, 2011
The miscibility and gas separation performance of Matrimid and sulfonated aromatic poly(ether ether ketone) (S-PEEK) blend membranes prepared by solution casting method were studied. A S-PEEK polymer with fixed degree of sulfonation was used for membrane synthesis.
Asim Laeeq Khan, Xianfeng Li, Ivo F.J. Vankelecom   +2 more
openaire   +1 more source

SPEEK-based Composite Membranes for Direct Methanol Fuel Cells

MRS Proceedings, 2008
AbstractSulfonated polyether ether ketone (SPEEK)-based composite membranes doped with 23 and 50 wt% of hydrated tin oxide (SnO2·nH2O) were prepared and characterized for Direct Methanol Fuel Cell (DMFC) applications . The composite membranes were characterized in terms of ion exchange capacity (IEC), tensile tests, water uptake measurements ...
D'Epifanio A., Mecheri B., Weise F. C., Greenbaum S., Traversa E., Licoceia S.   +5 more
openaire   +2 more sources

Amine Grafted Silica/SPEEK Nanocomposites as Proton Exchange Membranes

The Journal of Physical Chemistry B, 2010
This work presents the elaboration of porous silica nanospheres, eventually amine functionalized, which are used as the inorganic filler in mixed matrix silica/SPEEK membranes. The surface of the silica nanoparticles is modified by grafting (3-aminopropyl)dimethylethoxysilane (APDMS).
Marie J, Kayser, Marc X, Reinholdt, Serge, Kaliaguine   +2 more
openaire   +2 more sources

All-SPEEK flexible supercapacitor exploiting laser-induced graphenization

2D Materials, 2017
Flexible supercapacitors have emerged as one of the more promising and efficient space-saving energy storage system for portable and wearable electronics. Laser-induced graphenization has been recently proposed as a powerful and scalable method to directly convert a polymeric substrate into a 3D network of few layer graphene as high-performance ...
Lamberti, A., Serrapede, M., FERRARO, GIUSEPPE, Fontana, M., Perrucci, F., Bianco, S., Chiolerio, A., Bocchini, S.   +7 more
openaire   +1 more source

Broadband electric spectroscopy of proton conducting SPEEK membranes

Journal of Membrane Science, 2012
Many papers have focused on the thermal properties, conductivity and fuel cell performance of sulfonated poly(ether ether ketone) (SPEEK) membranes, but the electrical properties have not been extensively studied. In this work, the electric properties of SPEEK electrolytes are studied with broadband electric spectroscopy to elucidate the relationship ...
DI NOTO, VITO, PIGA, MATTEO, GIFFIN, GUINEVERE, Giuseppe Pace   +3 more
openaire   +2 more sources

COMPOSITE NAFION AND sPEEK-PORPHYRIN MEMBRANES

2015
The ability to control the spatial arrangement of porphyrins, through non covalent intermolecular interactions, is very important for accessing advanced functional materials with peculiar properties. Recently, we reported on the ability to easily tune porphyrin J-aggregates optical features using inner channels of Nafion membranes as confined ...
ROMEO, Andrea, MONSU' SCOLARO, Luigi, Castriciano, Maria Angela, Gaeta, Massimiliano, Gatto, Irene, Pedicini, Rolando, Saccà, Ada, Carbone, Alessandra   +7 more
openaire   +1 more source