Results 61 to 70 of about 893 (175)

Estudo das propriedades térmicas de filmes poliméricos compostos de Speek, derivados do benzoimidazol e ácido fosfotúngstico Thermal properties of Speek-based polymeric films containing benzimidazole derivatives and fosfotungstic acid

Polímeros, 2008
Filmes poliméricos foram desenvolvidos a partir de poli (éter éter cetona) sulfonado (SPEEK), derivados do benzoimidazol e ácido fosfotúngstico (HPW). Neste trabalho foi realizado um estudo utilizando a análise termogravimétrica com o objetivo de avaliar
Fabrício Celso, Raquel S. Mauler, Ailton S. Gomes   +2 more
doaj   +1 more source

Surface orientation of hydrophilic groups in sulfonated poly(ether ether ketone) membranes

Journal of Colloid and Interface Science, 2013
Sulfonated poly(ether ether ketone) copolymers (SPEEK) with a range of sulfonate contents (SC 77-51%) were synthesized via nucleophilic substitution polycondensation from hydroquinone and sulfonated hydroquinone. Membranes obtained by solvent casting from dimethylacetamide onto glass surfaces were analyzed for surface behavior.
He, Chenfeng, Guiver, Michael D., Mighri, Frej, Kaliaguine, Serge   +3 more
openaire   +4 more sources

Thorium Recovery with Crown Ether–Polymer Composite Membranes

Applied Sciences
Thorium is a weak radioactive element, but the control of its concentration in natural aqueous systems is of great interest for health, because it is a toxic heavy metal.
Aurelia Cristina Nechifor, Paul Constantin Albu, Ludmila Motelica, Geani Teodor Man, Alexandra Raluca Grosu, Szidonia-Katalin Tanczos, Vlad-Alexandru Grosu, Virgil Emanuel Marinescu, Gheorghe Nechifor   +8 more
doaj   +1 more source

Self-Healing Sulfonated Poly(ether ether ketone)-Based Polymer Electrolyte Membrane for Direct Methanol Fuel Cells: Effect of Solvent Content. [PDF]

Polymers (Basel), 2023
Tai MH, Thiam HS, Tee SF, Lim YS, Saw LH, Lai SO.   +5 more
europepmc   +1 more source

Critical Evaluation of the Methods for the Characterization of the Degree of Sulfonation for Electron Beam Irradiated and Non-Irradiated Sulfonated Poly(ether ether ketone) Membranes. [PDF]

Materials (Basel), 2023
Pakalniete LD, Maskova E, Zabolockis RJ, Avotina L, Sprugis E, Reinholds I, Rzepna M, Vaivars G, Pajuste E.   +8 more
europepmc   +1 more source

Graphene-based electrochemical system for tritium enrichment

Nuclear Fusion
In this study, a tritium enrichment system in the water phase has been developed based on the combination of a proton exchange membrane (PEM) electrolysis cell and a fuel cell. As the PEM, Nafion ^TM and laboratory-synthesized sulfonated poly(ether ether
R.J. Zabolockis, M. Sondars, G. Vaivars, I. Reinholds, V. Gostilo, V. Malgin, A. Kizilov, A. Lescinskis, A. Felsharuk, L. Avotina, A.S. Teimane, E. Sprugis, E. Pajuste   +12 more
doaj   +1 more source

A Comparative Study of Nafion 212 and Sulfonated Poly(Ether Ether Ketone) Membranes with Different Degrees of Sulfonation on the Performance of Iron-Chromium Redox Flow Battery. [PDF]

Membranes (Basel), 2023
Bai E, Zhu H, Sun C, Liu G, Xie X, Xu C, Wu S.   +6 more
europepmc   +1 more source

Performance of Void-Free Electrospun SPEEK/Cloisite as a Function of Degree of Dispersion State on Nanocomposite Proton Exchange Membrane for Direct Methanol Fuel Cell Application

Membranes, 2019
One of the main problems in direct methanol fuel cell (DMFC) application is methanol crossover. In order to solve the problem, an exfoliated void-free electrospun Sulfonated Poly(Ether Ether Ketone) (SPEEK)/cloisite nanocomposite membrane was developed ...
Nuha Awang, Juhana Jaafar, Ahmad Fauzi Ismail, Mohd Hafiz Dzarfan Othman, Mukhlis A. Rahman   +4 more
doaj   +1 more source

Synthesis, Characterization and Performance Study of Phosphosilicate Gel-Sulfonated Poly (Ether Ether Ketone) Nanocomposite Membrane for Fuel Cell Application [PDF]

Журнал нано- та електронної фізики, 2012
Phosphosilicate gel – SPEEK (Sulfonated Poly Ether Ether Ketone) hybrid nanocomposite membranes are proposed for performance enhancement of polymer electrolyte fuel cell.
S. Ganguly, K. Kargupta, A. Nanda, C.K. Dhole   +3 more
doaj  

A Convenient and Simple Ionic Polymer-Metal Composite (IPMC) Actuator Based on a Platinum-Coated Sulfonated Poly(ether ether ketone)-Polyaniline Composite Membrane. [PDF]

Polymers (Basel), 2022
Luqman M, Shaikh HM, Anis A, Al-Zahrani SM, Alam MA.   +4 more
europepmc   +1 more source