Results 41 to 50 of about 6,237 (218)

Electrochemical Properties of SPEEK/Epoxy/ Graphene Oxide Composites as Proton Exchange Membrane

International Journal of Electrochemical Science, 2018
The DS 68% SPEEK composite membranes were prepared by post-sulfonation. Using diethylenetriamine as the epoxy cross-linking agent, which is uniformly distributed in the grafted SPEEK to form SPEEK/epoxy semi-interpenetrating network structure and explore
Zhengping Zhao, Chenyu Pan, Guojun Jiang, Mingqiang Zhong, Benhua Fei   +4 more
doaj   +1 more source

Using life-history traits to explain bird population responses to changing weather variability [PDF]

, 2011
Bird population dynamics are expected to change in response to increased weather variability, an expression of climate change. The extent to which species are sensitive to effects of weather on survival and reproduction depends on their life-history ...
Braak, C.J.F., ter, Cormont, A., Foppen, R.P.B., Turnhout, C.A.M., van, Vos, C.C.   +4 more
core   +2 more sources

A covalent organic/inorganic hybrid proton exchange polymeric membrane: synthesis and characterization [PDF]

, 2005
Commercial polyetheretherketone (Victrex PEEK) was sulfonated up to 90% degree of sulfonation (DS), then reacted with SiCl4 to obtain a hybrid polymer. The product was characterized by 29-Si NMR and ATR/FTIR spectroscopies demonstrating the formation of
D'Epifanio, A, Di Vona, ML, Licoccia, S, Marani, D, Traversa, E, Trombetta, M   +5 more
core   +1 more source

Novel proton conducting core–shell PAMPS-PVBS@Fe2TiO5 nanoparticles as a reinforcement for SPEEK based membranes

Scientific Reports, 2021
In this study, new nanocomposite membranes from sulfonated poly (ether ether ketone) (SPEEK) and proton-conducting Fe2TiO5 nanoparticles are prepared by the solution casting method.
Parisa Salarizadeh, Mehran Javanbakht, Mohammad Bagher Askari, Khadijeh Hooshyari, Morteza Moradi, Hossein Beydaghi, Mohadese Rastgoo-Deylami, Morteza Enhessari   +7 more
doaj   +1 more source

Porous Titanium surfaces to control bacteria growth: mechanical properties and sulfonated polyetheretherketone coating as antibiofounling approaches [PDF]

, 2019
Here, titanium porous substrates were fabricated by a space holder technique. The relationship between microstructural characteristics (pore equivalent diameter, mean free-path between pores, roughness and contact surface), mechanical properties (Young’s
Beltrán, Ana M., Civantos, Ana, Domínguez-Trujillo, Cristina, García-Moreno, Francisco, Kamm, Paul H., Mesa Restrepo, Andrea, Moriche Tirado, Rocío, Rodríguez-Ortiz, José Antonio, Torres Hernández, Yadir, Webster, Thomas J.   +9 more
core  

Efficient Membranes Made of a Nanohybrid of Fluorine‐Doped Carbon Dots Coupled With Metal Organic Framework for High‐Performance Vanadium Redox Flow Battery

Advanced Functional Materials, EarlyView.
A sulfonated poly(ether ether ketone)‐based hybrid membrane is fabricated with fluorine‐doped carbon dot (FCD) and functionalized metal organic framework (MIL−101−NH2). The novel design reduces unwanted ion crossover while maintaining a sufficient proton transport pathway.
Tan Trung Kien Huynh, Nayanthara P. S., Muhammad Fawad Khan, Tong Yang, Zijian Cai, Saveen Senanayake, Yang Yang, Jiaye Ye, Hongxia Wang   +8 more
wiley   +1 more source

Investigation of thermo-mechanical behavior, proton transfer and methanol permeation of polymer electrolyte membrane in low sulfonated state modified with thermally stable surface functionalized graphene oxide nanosheets

Polymer Testing, 2021
Sulfonated polyether ether ketone is currently under investigation to replace the expensive Nafion® as polymer electrolyte membrane. Sulfonic acid group is hydrophilic in nature and plays a key role in proton transfer in polymer electrolyte membranes ...
Sher Ayaz, Hai-Yin Yu
doaj   +1 more source

SPEEK: effect evaluation of a Ghanaian school-based and peer-led sexual education programme [PDF]

Health Education Research, 2018
In sub-Saharan Africa, theory and evidenced-based interventions that are systematically designed and using sound evaluation methods to report on effectiveness are limited. A sex education programme called SPEEK was developed, implemented and evaluated in Ghana using the Intervention Mapping approach.
John K Krugu, Fraukje E F Mevissen, Gerard Van Breukelen, Robert A C Ruiter   +3 more
openaire   +2 more sources

Recent Advances in Laser‐Induced Graphene‐Based Gas Sensors: From Sensing Mechanisms to Biomedical Applications

Advanced Science, EarlyView.
Laser‐induced graphene (LIG) provides a scalable, laser‐direct‐written route to porous graphene architecture with tunable chemistry and defect density. Through heterojunction engineering, catalytic functionalization, and intrinsic self‐heating, LIG achieves highly sensitive and selective detection of NOX, NH3, H2, and humidity, supporting next ...
Md Abu Sayeed Biswas, Ankan Dutta, Shuvendu Das, Abu Musa Abdullah, Wanqing Zhang, Fatema Tuz Zohra, Huanyu Cheng   +6 more
wiley   +1 more source

Ion exchange membranes based upon crosslinked sulfonated polyethersulfone for electrochemical applications [PDF]

, 2013
Synthesis and characterization of new ion exchange membranes made from chlorosulfonated polyethersul- fone (SO2Cl-PES) crosslinked by polyaminated crosslinking reagents have been performed.
FAUVARQUE, J.F, MABROUK, Walid, MATOUSSI, F., OGIER, Lionel, SOLLOGOUB, Cyrille, VIDAL, Serge   +5 more
core   +6 more sources