Results 41 to 50 of about 893 (175)

Sulfonated poly (fluorenyl ether ketone nitrile) membranes used for high temperature PEM fuel cell

Heliyon, 2020
A series of sulfonated poly (fluorenyl ether ketone nitrile)s with different equivalent weights (EW) ranging from 681 to 369 g mequiv.−1 were used to assemble a series of single proton exchange membrane fuel cells (PEMFC) in their turns.
Yingnan Zou, Mei Yang, Guoqing Liu, Chungang Xu   +3 more
doaj   +1 more source

Highly proton conductive and mechanically robust SPEEK composite membranes incorporated with hierarchical metal–organic framework/carbon nanotubes compound

Journal of Materials Research and Technology, 2023
The preparation of composite proton exchange membranes (PEMs) by incorporating metal- organic frameworks (MOFs) into polymeric substrates has become a hot research topic in the field of fuel cells in recent years.
Jinyu Fu, Jing Ni, Jie Wang, Ting Qu, Fuqiang Hu, Hai Liu, Quanyuan Zhang, Zushun Xu, Chunli Gong, Sheng Wen   +9 more
doaj   +1 more source

Characteristics, properties and limitations of per‐ or polyfluoroalkyl substances (PFASs) and fluoropolymers

Polymer International, EarlyView.
An overview and categorization of man‐made per‐ or polyfluoroalkyl substances (PFASs) including low‐molar‐mass and high‐molar‐mass fluorochemicals, and their international regulations is presented. Though certain PFASs are toxic, bioaccumulative and cross the human cellular membranes, others, such as fluoropolymers, are safe, reliable and involved in ...
Bruno Améduri
wiley   +1 more source

SPEEK Membrane of Ultrahigh Stability Enhanced by Functionalized Carbon Nanotubes for Vanadium Redox Flow Battery

Frontiers in Chemistry, 2018
Proton exchange membrane is the key factor of vanadium redox flow battery (VRB) as their stability largely determine the lifetime of the VRB. In this study, a SPEEK/MWCNTs-OH composite membrane with ultrahigh stability is constructed by blending ...
Mei Ding, Xiao Ling, Du Yuan, Yuanhang Cheng, Chun Wu, Zi-Sheng Chao, Lidong Sun, Lidong Sun, Chuanwei Yan, Chuankun Jia, Chuankun Jia, Chuankun Jia   +11 more
doaj   +1 more source

An overview of organic/inorganic membranes based on sulfonated poly ether ether ketone for application in proton exchange membrane fuel cells [PDF]

Journal of Renewable Energy and Environment, 2017
Nowadays, proton exchange membrane fuel cells (PEMFCs) are the most promising green energy conversion devices for portable and stationary applications.
Somayeh Sarirchi, S. Rowshanzamir
doaj   +1 more source

Recent advances in polymeric chemically amplified positive resists: Materials and design strategies

Smart Molecules, EarlyView.
This review summarizes recent advances in the molecular design of positive chemically amplified resists, focusing on photoacid generators and polymer architectures. Key strategies for enhancing sensitivity—including self‐amplification effects, copolymerization of sensitive monomers, controlled polymerization, and photosensitized chemically amplified ...
Litao Zhou, Haoyuan Li, Jianhua Zhang, Hanshen Xin   +3 more
wiley   +1 more source

Sodium Hypochlorite Pentahydrate in Organic Synthesis and Beyond

Chemistry–Methods, Volume 6, Issue 10, October 2026.
Sodium hypochlorite pentahydrate emerges as a versatile, stable, and practical oxidant for organic synthesis. This review highlights its unique reactivity, broad synthetic applications, and growing impact on sustainable oxidation chemistry, providing a comprehensive overview of recent advances and future opportunities. Sodium hypochlorite pentahydrate (
Masayuki Kirihara, Hideyuki Tsutsui, Yoshikazu Kimura   +2 more
wiley   +1 more source

Building Sulfone Bridges: Multi‐Technique Analysis of Thermally Induced Cross‐Linking in Highly Sulfonated Poly(Phenylsulfone)

Journal of Polymer Science, Volume 64, Issue 18, Page 3903-3915, 15 September 2026.
Highly sulfonated poly(phenylsulfone) undergoes controlled thermal cross‐linking through sulfone bridge formation, exploiting the dual role of sulfonic acid groups as both proton‐conducting functionalities and reactive precursors. The resulting fluorine‐free membranes exhibit enhanced hydrolytic, thermal, and mechanical stability while maintaining ...
A. Fahs, J.‐F. Chailan, E. Sgreccia, M. Vagnarelli, L. Pasquini, P. Knauth, M. L. Di Vona   +6 more
wiley   +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

Surface and Interfacial Engineering toward Durable Mechanically Coupled Flexible Electronics

Advanced Science, Volume 13, Issue 49, 3 September 2026.
This Review highlights how surface and interfacial engineering governs the reliability, durability, and functional stability of mechanically coupled flexible electronics. By integrating fundamental interfacial theory, failure mechanisms, multiscale engineering strategies, and representative applications, it provides a design‐oriented framework for ...
Qian Wang, Fangfang Dai, Wei Wu
wiley   +1 more source