Results 31 to 40 of about 963 (161)

Studies on the SPEEK membrane with low degree of sulfonation as a stable proton exchange membrane for fuel cell applications [PDF]

Hydrogen, Fuel Cell & Energy Storage, 2017
Sulfonated poly (ether ether ketone) (SPEEK) with a low degree of sulfonation (DS = 40%) was prepared for proton exchange membrane fuel cells (PEMFC).
Mohammad Javad Parnian, Fatemeh Gashoul, Soosan Rowshanzamir   +2 more
doaj   +1 more source

Vertebral Endplate Concavity in Lateral Lumbar Interbody Fusion: Tapered 3D-Printed Porous Titanium Cage versus Squared PEEK Cage

Medicina, 2023
Background and Objectives: To prevent postoperative problems in extreme lateral interbody fusion (XLIF), it is critical that the vertebral endplate not be injured. Unintentional endplate injuries may depend on the cage.
Naoki Segi, Hiroaki Nakashima, Ryuichi Shinjo, Yujiro Kagami, Masaaki Machino, Sadayuki Ito, Jun Ouchida, Kazuaki Morishita, Ryotaro Oishi, Ippei Yamauchi, Shiro Imagama   +10 more
doaj   +1 more source

Dynamic investigation of hydrocarbon proton exchange membrane Fuel Cell [PDF]

Hydrogen, Fuel Cell & Energy Storage, 2018
Sulfonated polyether ether ketone (SPEEK) is categorized in a nonfluorinated aromatic hydrocarbon proton exchange membrane (PEM) group and considered as a suitable substitute for common per-fluorinated membranes, such as Nafion, due to wider operating ...
Milad Shakouri Kalfati, Aida Karimi, Soosan Rowshanzamir   +2 more
doaj   +1 more source

Simple, inexpensive and RNase-free purification of plasmid DNA by fractional precipitation with isopropanol

BioTechniques, 2021
We present a modified alkaline lysis method for purification of plasmid DNA (pDNA) from bacterial extract using fractional precipitation with isopropanol (FPI).
Viiu Paalme, Mart Speek
doaj   +1 more source

Development of Cost-Effective sPEEK/Al2O3 Composite Membranes with Enhanced Proton Conductivity and Durability for PEMFCs [PDF]

E3S Web of Conferences
Polymer electrolyte membrane (PEM)-based fuel cells are emerging fields with high efficiency, low pollutant emissions, and low material consumption. However, conventional membranes have poor thermal resistance and are expensive.
Hakim Muhammad Fahmi, Hidayati Nur, Hasannah Cintiya Septa, Widianto Eri, Fauji Najmudin   +4 more
doaj   +1 more source

Electrochemical Detection of Dopamine at Fe₃O₄/SPEEK Modified Electrode

Molecules, 2021
Reported here is the design of an electrochemical sensor for dopamine (DA) based on a screen print carbon electrode modified with a sulphonated polyether ether ketone-iron (III) oxide composite (SPCE-Fe3O4/SPEEK). L.
Mogomotsi N. Ranku, Gloria E. Uwaya, Omolola E. Fayemi   +2 more
doaj   +1 more source

Enhanced proton conductivity of sulfonated poly(ether ether ketone) incorporating oxidized polyvinyl alcohol for high-performance proton exchange membranes

Materials for Renewable and Sustainable Energy
Alternative proton exchange membranes (PEMs) with high proton conductivity must be fabricated at reasonable costs to qualify as commercially used proton-exchange membrane fuel cells (PEMFCs).
Mohamed A. Ben Ali, Mohamed A. Ben Moussa, Souhib Umer Ilyas, Rizwan Nasir, Dorra Ghorbel, Sherif M. A. S. Keshk   +5 more
doaj   +1 more source

Electrochemical Properties of Poly(aminobenzene sulfonic)phosphazene Derivative Grafted SPEEK Proton Exchange Membrane

International Journal of Electrochemical Science, 2015
A type of poly(aminobenzene sulfonic)phosphazene derivative grafted SPEEK was synthesized which were confirmed by FT-IR and NMR analysis. And a series of grafted SPEEK proton exchange membranes with 65% sulfonation degree were prepared.
Zhengping Zhao, Zeping Zhou, J.I. Jianbing, Fang Xie   +3 more
doaj   +1 more source

Fabrication and development of SPEEK/PVdF-HFP/SiO2 proton exchange membrane for microbial fuel cell application

Chemical Engineering Journal Advances, 2023
This study presents the potential of sulfonated poly (ether-ether-ketone)/ poly (vinylidene fluorideco-hexafluoro propylene)/SiO2 (SPEEK/PVdF-HFP/SiO2) composite proton exchange membrane for the use of microbial fuel cell.
Jagdeep Kumar Nayak, Uday Shankar, Kundan Samal   +2 more
doaj   +1 more source

Performance of high sulfonated poly(ether ether ketone) improved with microcrystalline cellulose and 2,3-dialdehyde cellulose for proton exchange membranes

Materials for Renewable and Sustainable Energy
Sulfonated poly (ether ether ketone) (SPEEK) has received substantial attention for its potential to improve the electrochemical behavior and thermomechanical capabilities of direct methanol fuel cells. This study examines how the integration by solution
Mohamed Amine Ben Moussa, Zakarya Ahmed, Khaled Charradi, Boutheina Ben Fraj, Sami Boufi, Andreas Koschella, Thomas Heinze, Sherif M. A. S. Keshk, Ibtissem Ben Assaker   +8 more
doaj   +1 more source