Results 51 to 60 of about 5,731 (205)

Sulfonated PVA / PBI Based Crosslinked Composites Towards Anhydrous Proton Conductive Polymer Electrolyte Membranes for Fuel Cells

International Journal of Electrochemical Science, 2012
Polymer electrolyte membrane fuel cells (PEMFCs) are being considered as highly promising future energy source due to their high-energy conversion efficiency and their ability to address the environmental concerns related to current energy production ...
Arfat Anis, S.M. Al-Zahrani
doaj   +1 more source

Amphiphilic Cu(II) Oxacyclen Complexes: From Oxidative Cleavage to Condensation of DNA

ChemBioChem, Volume 27, Issue 2, January 2026.
Monoalkylated Cu(II) oxacyclen complexes show a dual DNA effect: shorter alkyl chains enable ROS‐mediated DNA cleavage, whereas longer chains cause strong DNA condensation/aggregation. Thus, chain length controls activity. Using circular dichroism, UV/visible and fluorescence spectroscopy, atomic force microscopy, dynamic light scattering, and ...
Olga Verbitsky, Sebastián Hinojosa, Amr Mostafa, Deepak Ojha, Ilko Bald, Nora Kulak   +5 more
wiley   +1 more source

Nanocrystal formation during thermal treatment of phosphoric-acid-swollen polybenzimidazole membranes

Frontiers in Materials, 2023
The design of suitable and efficient membranes for fuel and electrolyzer cells has been a long standing problem that still seeks for technical improvements. The structural properties of proton conducting poly [2,2-(m-phenylene)-5,5-bibenzimidazole] (PBI)
O. Ivanova, W. Lüke, K. Nemkovski, M.-S. Appavou, N. K. Szekely, V. Pipich, H. Frielinghaus, M. Monkenbusch, R. Zorn, W. Lehnert, W. Lehnert, O. Holderer   +11 more
doaj   +1 more source

Polymeric foams from cross-linkable poly-N-ary lenebenzimidazoles [PDF]

, 1978
Foamed cross-linked poly-N-arylenebinzimidazoles are prepared by mixing an organic tetraamine and an ortho substituted aromatic dicarboxylic acid anhydride in the presence of a blowing agent, and then heating the prepolymer to a temperature sufficient to
Delano, C. B., Harrison, E. S., Riccitello, S. R.   +2 more
core   +1 more source

Short Side‐Chain Perfluorosulfonic Acid Aquivion: From Production to Application

Macromolecular Materials and Engineering, Volume 311, Issue 1, January 2026.
This review presents the latest findings on the polymerization mechanism of the short side‐chain perfluorosulfonic acid (PFSA) Aquivion. Then, the state‐of‐the‐art of its applications is reported, spanning from proton and anion exchange membrane fuel cells and water electrolyzers to natural gas sweetening to heterogeneous catalysis for chemical ...
Samuele Delfino, Davide Carlo Villa, Alice Giannetti, Daniela Valeria Tomasino, Claudio Oldani, Giuseppe Storti, Mattia Sponchioni   +6 more
wiley   +1 more source

UV Photo-Oxidation of Polybenzimidazole (PBI)

Technologies, 2020
Since polybenzimidazole (PBI) is often used in the aerospace industry, high-temperature fuel cells, and in redox flow batteries, this research investigated the surface modification of PBI film with 253.7 and 184.9 nm UV photo-oxidation.
Devon Shedden, Kristen M. Atkinson, Ibrahim Cisse, Shin Lutondo, Tyshawn Roundtree, Michilena Teixeira, Joel Shertok, Michael Mehan, Gregory K. Thompson, Surendra K. Gupta, Gerald A. Takacs   +10 more
doaj   +1 more source

MXene‐Based Polymer Composites for Advanced Filtration: Properties, Fabrication, and Future Directions

ChemistrySelect, Volume 11, Issue 3, 22 January 2026.
MXene–polymer nanocomposites merge high surface area with polymer flexibility to create efficient and robust filtration membranes. This review covers materials, fabrication methods, performance, challenges, and their potential for sustainable water and air filtration technologies. ABSTRACT MXene‐based polymer composites have become a promising material
Md. Hanif Munshi, Shaikh Almoon Hussain, Monira Akter, Md. Azizul Hakim, Md. Abu Hasan, Md. Jawed Kabir, Md. Kamruzzaman, Tarikul Islam   +7 more
wiley   +1 more source

Hydrogen and Oxygen Crossover in Anion Exchange Membranes

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
In recent years, anion exchange membrane fuel cells (AEMFCs) have drawn more attention by showing high performance and potentially allowing catalysts based on more abundant materials. One frequently overlooked parameter in these systems is membranes permeability, often referred to as gas crossover.
Nikola Nikolić, Björn Eriksson, Carina Lagergren, Rakel Wreland Lindström, Göran Lindbergh, Ahmad Azmin Mohamad   +5 more
wiley   +1 more source

Preparation of Polybenzimidazole Hollow-Fiber Membranes for Reverse Osmosis and Nanofiltration by Changing the Spinning Air Gap

Membranes, 2018
High-performance polybenzimidazole (PBI) hollow-fiber membranes (HFMs) were fabricated through a continuous dry-jet wet spinning process at SRI International.
Xiao Wang, Palitha Jayaweera, Radwan A. Alrasheed, Saad A. Aljlil, Yousef M. Alyousef, Mohammad Alsubaei, Hamad AlRomaih, Indira Jayaweera   +7 more
doaj   +1 more source

Impact of Operating Voltage on Membrane Hydration and Hydrogen Compression Efficiency in Electrochemical Hydrogen Compressors

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
The electrochemical hydrogen compressor (EHC) operates without the oxygen reduction reaction, inherently lacking water generation at the cathode. As a result, the polymer electrolyte membrane undergoes continuous dehydration via electroosmotic drag, leading to increased ohmic resistance and reduced system performance.
Hyeokbin Kweon, Kibum Kim, Semen Klyamkin   +2 more
wiley   +1 more source