Crystallinity and Motional Dynamics Study of a Series of Poly(arylene ether sulfone) Segmented Copolymer Analogues

2012 ◽  
Vol 116 (27) ◽  
pp. 7970-7980 ◽  
Author(s):  
Bin Zhang ◽  
Justin Spano ◽  
Ying Chen ◽  
Richard Turner ◽  
Sungsool Wi
Keyword(s):  
Arylene Ether ◽  
Motional Dynamics

scholarly journals Sulfonated poly(arylene ether sulfone) functionalized polysilsesquioxane hybrid membranes with enhanced proton conductivity

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 430-442 ◽  
Author(s):  
Rajdeep Mukherjee ◽  
Arun Kumar Mandal ◽  
Susanta Banerjee
Keyword(s):  
Proton Conductivity ◽  
Sol Gel ◽  
Composite Membranes ◽  
Casting Technique ◽  
Force Microscopy ◽  
Arylene Ether ◽  
Transmission Electron ◽  
Uniform Dispersion ◽  
Solution Casting Technique ◽  
Sulfonated Poly

AbstractSulfopropylated polysilsesquioxane and –COOH containing fluorinated sulfonated poly(arylene ether sulfone) composite membranes (SPAES-SS-X) have been prepared via an in situ sol–gel reaction through the solution casting technique. The composite membranes showed excellent thermal and chemical stability, compared to the pristine SPAES membrane. The uniform dispersion of the sulfonated SiOPS nanoparticles on the polymer matrix was observed from the scanning electron microscope images. Atomic force microscopy and transmission electron microscopy images indicated significantly better phase-separated morphology and connectivity of the ionic domains of the composite membranes than the pristine SPAES membrane. The composite membranes showed considerable improvement in proton conductivity and oxidative stability than the pristine copolymer membrane under similar test conditions.

A poly(arylene ether sulfone) hybrid membrane using titanium dioxide nanoparticles as the filler

2016 ◽  
Vol 29 (1) ◽  
pp. 26-35 ◽  
Author(s):  
Yunwu Yu ◽  
Wenhao Pan ◽  
Xiaoman Guo ◽  
Lili Gao ◽  
Yaxin Gu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Titanium Dioxide ◽  
Gas Separation ◽  
Proton Nuclear Magnetic Resonance ◽  
Separation Performance ◽  
Hydroxyl Groups ◽  
Hybrid Membranes ◽  
Permeability Coefficients ◽  
Arylene Ether ◽  
The Matrix

Poly(arylene ether sulfone) (PES)–titanium dioxide (TiO2) hybrid membranes were prepared via solution blending method using TiO2 nanoparticles as inorganic filler. The chemical structure and thermal stability of the matrix polymer were characterized by proton nuclear magnetic resonance, Fourier transform infrared, differential scanning calorimetry, and thermogravimetric analysis. The crystal structure, morphology, mechanical properties, and gas separation performance of hybrid membranes were characterized in detail. As shown in scanning electron microscopic images, TiO2 nanoparticles dispersed homogeneously in the matrix. Although the mechanical properties of hybrid membranes decreased certainly compared to the pure PES membranes, they are strong enough for gas separation in this study. All gas permeability coefficients of PES-TiO2 hybrid membranes were higher than pure PES membranes, attributed to the nanogap caused by TiO2 nanoparticles, for instance, oxygen and nitrogen permeability coefficients of Hybrid-3 (consists of PES with 4-amino-phenyl pendant group and hexafluoroisopropyl (Am-PES)-20 and TiO2 nanoparticles, 5 wt%) increased from 2.57 and 0.33 to 5.88 and 0.63, respectively. In addition, the separation factor increased at the same time attributed to the stimulative transfer effect caused by the interaction of hydroxyl groups on the TiO2 nanoparticle and polar carbon dioxide molecules.

N-cyclic cationic group-functionalized cardo poly(arylene ether sulfone)s membranes with ultrahigh selectivity for diffusion dialysis in acid recovery

2021 ◽  
Vol 624 ◽  
pp. 119115
Author(s):  
Feixiang Gong ◽  
Zhitao Fan ◽  
Wenke Xia ◽  
Meng Zhang ◽  
Lei Wang ◽  
...  
Keyword(s):  
Arylene Ether ◽  
Acid Recovery ◽  
Cationic Group ◽  
Diffusion Dialysis

scholarly journals Motional dynamics of single Patched1 molecules in cilia are controlled by Hedgehog and cholesterol

2019 ◽  
Vol 116 (12) ◽  
pp. 5550-5557 ◽  
Author(s):  
Lucien E. Weiss ◽  
Ljiljana Milenkovic ◽  
Joshua Yoon ◽  
Tim Stearns ◽  
W. E. Moerner
Keyword(s):  
Single Molecule ◽  
Hedgehog Signaling ◽  
Primary Cilia ◽  
Transmembrane Protein ◽  
Cellular Level ◽  
Live Cells ◽  
Cholesterol Depletion ◽  
Motional Dynamics ◽  
Directional Transport ◽  
Bulk Behavior

The Hedgehog-signaling pathway is an important target in cancer research and regenerative medicine; yet, on the cellular level, many steps are still poorly understood. Extensive studies of the bulk behavior of the key proteins in the pathway established that during signal transduction they dynamically localize in primary cilia, antenna-like solitary organelles present on most cells. The secreted Hedgehog ligand Sonic Hedgehog (SHH) binds to its receptor Patched1 (PTCH1) in primary cilia, causing its inactivation and delocalization from cilia. At the same time, the transmembrane protein Smoothened (SMO) is released of its inhibition by PTCH1 and accumulates in cilia. We used advanced, single molecule-based microscopy to investigate these processes in live cells. As previously observed for SMO, PTCH1 molecules in cilia predominantly move by diffusion and less frequently by directional transport, and spend a fraction of time confined. After treatment with SHH we observed two major changes in the motional dynamics of PTCH1 in cilia. First, PTCH1 molecules spend more time as confined, and less time freely diffusing. This result could be mimicked by a depletion of cholesterol from cells. Second, after treatment with SHH, but not after cholesterol depletion, the molecules that remain in the diffusive state showed a significant increase in the diffusion coefficient. Therefore, PTCH1 inactivation by SHH changes the diffusive motion of PTCH1, possibly by modifying the membrane microenvironment in which PTCH1 resides.

Enhanced CO2 permeability of thermal crosslinking membrane via sulfonation/desulfonation of phenolphthalein-based cardo poly(arylene ether ketone)

2020 ◽  
Vol 598 ◽  
pp. 117824 ◽  
Author(s):  
Ruisong Xu ◽  
Lin Li ◽  
Mengjie Hou ◽  
Jiajia Xue ◽  
Yuzhe Liu ◽  
...  
Keyword(s):  
Arylene Ether ◽  
Thermal Crosslinking ◽  
Ether Ketone

Crosslinked sulfonated poly(arylene ether ketone) with pendant carboxylic acid group via poly(ethylene glycol) for proton exchange membrane

2010 ◽  
Vol 118 (6) ◽  
pp. 3318-3323 ◽  
Author(s):  
Zhiliang Li ◽  
Xincai Liu ◽  
Danming Chao ◽  
Xiaofeng Lu ◽  
Libing He ◽  
...  
Keyword(s):  
Proton Exchange Membrane ◽  
Acid Group ◽  
Proton Exchange ◽  
Poly Ethylene Glycol ◽  
Carboxylic Acid Group ◽  
Arylene Ether ◽  
Ether Ketone ◽  
Poly Ethylene ◽  
Exchange Membrane ◽  
Sulfonated Poly

Synthesis, Characterization and Properties of New Semifluorinated Poly(arylene ether phosphine oxide)s

2011 ◽  
Vol 297 (2) ◽  
pp. 145-154 ◽  
Author(s):  
Anindita Ghosh ◽  
Debaditya Bera ◽  
De-Yi Wang ◽  
Hartmut Komber ◽  
Aruna Kumar Mohanty ◽  
...  
Keyword(s):  
Phosphine Oxide ◽  
Arylene Ether
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