Poly(Arylene Ether Sulfone) Ionomers with Different Acidity Strengths and Fuel Cell Membrane Properties

2013 ◽  
Vol 50 (2) ◽  
pp. 1031-1035
Author(s):  
Y. Chang ◽  
G. F. Brunello ◽  
M. Disabb-Miller ◽  
M. Hawley ◽  
Y. S. Kim ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Cell Membrane ◽  
Membrane Properties ◽  
Arylene Ether

Polybenzimidazole co-polymers: their synthesis, morphology and high temperature fuel cell membrane properties

2020 ◽  
Vol 11 (5) ◽  
pp. 1043-1054 ◽  
Author(s):  
Satheesh Kumar B. ◽  
Balakondareddy Sana ◽  
G. Unnikrishnan ◽  
Tushar Jana ◽  
Santhosh Kumar K. S.
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Cell Membrane ◽  
Dicarboxylic Acid ◽  
Terephthalic Acid ◽  
Dicarboxylic Acids ◽  
Membrane Properties ◽  
Molar Ratios

Polybenzimidazole (PBI) random co-polymers containing alicyclic and aromatic backbones were synthesized using two different dicarboxylic acids (viz., cyclohexane dicarboxylic acid and terephthalic acid) by varying their molar ratios.

Novel sulfonated poly(arylene ether sulfone) containing hydroxyl groups for enhanced proton exchange membrane properties

2015 ◽  
Vol 6 (2) ◽  
pp. 233-239 ◽  
Author(s):  
Yeonhye Kwon ◽  
So Young Lee ◽  
Sukjae Hong ◽  
Jong Hyun Jang ◽  
Dirk Henkensmeier ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Membrane Properties ◽  
Hydroxyl Groups ◽  
Arylene Ether ◽  
Exchange Membrane ◽  
Sulfonated Poly

We here report a new sulfonated poly(arylene ether sulfone) modified with hydroxyl side groups for a proton exchange membrane fuel cell (PEMFC).

The improved ion clustering and conductivity of a di-quaternized poly(arylene ether ketone sulfone)-based alkaline fuel cell membrane

2017 ◽  
Vol 1 (4) ◽  
pp. 932-940 ◽  
Author(s):  
Geetanjali Shukla ◽  
Vinod K. Shahi
Keyword(s):  
Fuel Cell ◽  
Cell Membrane ◽  
Random Copolymer ◽  
Alkaline Fuel Cell ◽  
Arylene Ether ◽  
Ether Ketone ◽  
Alkaline Membrane

Herein, we designed a hydrophobic–hydrophilic phase-separated poly(arylene ether ketone sulfone) (PAEKS) random copolymer-based di-quaternized stable and highly conductive alkaline membrane (AM).

scholarly journals Quantitative Analysis of the Membrane Affinity of Local Anesthetics Using a Model Cell Membrane

Membranes ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 579
Author(s):  
Wanjae Choi ◽  
Hyunil Ryu ◽  
Ahmed Fuwad ◽  
Seulmini Goh ◽  
Chaoge Zhou ◽  
...  
Keyword(s):  
Cell Membrane ◽  
Local Anesthetics ◽  
Electrophysiological Study ◽  
Local Area ◽  
Membrane Properties ◽  
Dominant Factor ◽  
Free Standing ◽  
Membrane Affinity ◽  
Conformational Effects ◽  
Model Protein

Local anesthesia is a drug that penetrates the nerve cell membrane and binds to the voltage gate sodium channel, inhibiting the membrane potential and neurotransmission. It is mainly used in clinical uses to address the pain of surgical procedures in the local area. Local anesthetics (LAs), however, can be incorporated into the membrane, reducing the thermal stability of the membrane as well as altering membrane properties such as fluidity, permeability, and lipid packing order. The effects of LAs on the membrane are not yet fully understood, despite a number of previous studies. In particular, it is necessary to analyze which is the more dominant factor, the membrane affinity or the structural perturbation of the membrane. To analyze the effects of LAs on the cell membrane and compare the results with those from model membranes, morphological analysis and 50% inhibitory concentration (IC50) measurement of CCD-1064sk (fibroblast, human skin) membranes were carried out for lidocaine (LDC) and tetracaine (TTC), the most popular LAs in clinical use. Furthermore, the membrane affinity of the LAs was quantitatively analyzed using a colorimetric polydiacetylene assay, where the color shift represents their distribution in the membrane. Further, to confirm the membrane affinity and structural effects of the membranes, we performed an electrophysiological study using a model protein (gramicidin A, gA) and measured the channel lifetime of the model protein on the free-standing lipid bilayer according to the concentration of each LA. Our results show that when LAs interact with cell membranes, membrane affinity is a more dominant factor than steric or conformational effects of the membrane.

Modeling the Mechanics of Tethers Pulled From the Cochlear Outer Hair Cell Membrane

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Kristopher R. Schumacher ◽  
Aleksander S. Popel ◽  
Bahman Anvari ◽  
William E. Brownell ◽  
Alexander A. Spector
Keyword(s):  
Cell Membrane ◽  
Hair Cell ◽  
Outer Hair Cell ◽  
Lateral Wall ◽  
Outer Hair Cells ◽  
The Body ◽  
Computational Method ◽  
Membrane Properties ◽  
Bending Modulus ◽  
Sound Amplification

Cell membrane tethers are formed naturally (e.g., in leukocyte rolling) and experimentally to probe membrane properties. In cochlear outer hair cells, the plasma membrane is part of the trilayer lateral wall, where the membrane is attached to the cytoskeleton by a system of radial pillars. The mechanics of these cells is important to the sound amplification and frequency selectivity of the ear. We present a modeling study to simulate the membrane deflection, bending, and interaction with the cytoskeleton in the outer hair cell tether pulling experiment. In our analysis, three regions of the membrane are considered: the body of a cylindrical tether, the area where the membrane is attached and interacts with the cytoskeleton, and the transition region between the two. By using a computational method, we found the shape of the membrane in all three regions over a range of tether lengths and forces observed in experiments. We also analyze the effects of biophysical properties of the membrane, including the bending modulus and the forces of the membrane adhesion to the cytoskeleton. The model’s results provide a better understanding of the mechanics of tethers pulled from cell membranes.

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