Results 91 to 100 of about 4,874 (220)

Preparation and Characterization of Sulfonated Poly (ether ether ketone)/Phosphated Zirconia Nanoparticles Composite Proton-conducting Membranes [PDF]

, 2015
Proton-conducting membranes of organic–inorganic (sulfonated poly (ether ether ketone)/phosphated zirconia nanoparticles) composite were prepared by incorporating various ratios of phosphated zirconia nanoparticles (ZP) in sulfonated poly (ether ether ...
Bladergroen, B, Ji, S, Linkov, V, Luo, H, Vaivars, G   +4 more
core   +1 more source

Hyperbranched macromolecules: From synthesis to applications [PDF]

, 2018
Hyperbranched macromolecules (HMs, also called hyperbranched polymers) are highly branched three-dimensional (3D) structures in which all bonds converge to a focal point or core, and which have a multiplicity of reactive chain-ends.
Gao, Hyuk-Jun Noh, In-Yup Jeon, Jong-Beom Baek, Zhou   +4 more
core   +2 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

Ab-initio study of cationic polymeric membranes in water and methanol [PDF]

, 2015
International ...
Chappey, Corinne, Fatyeyeva, Kateryna, Karpenko-Jereb, Larisa, Kelterer, Anne-Marie, Kujawa, Joanna, Kujawski, Wojciech, Lunghammer, Sarah, Marais, Stephane, Rynkowska, Edyta   +8 more
core   +4 more sources

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

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

Different approaches in sulfonated poly (ether ether ketone) conductivity measurements [PDF]

, 2019
Ion conductivity of sulfonated poly (ether ether ketone) (SPEEK) membranes with various degree of sulfonation (DS) was investigated using impedance analysis with different measuring cell configuration and ion conductivity was calculated from resistances ...
Fedorenko, D., Vaivars, Guntars
core   +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

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

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