Proton Conductivity and Vapor Permeation Properties of Polyimides Containing Sulfonic Acid Groups

2004 ◽  
pp. 253-268 ◽  
Author(s):  
Tatsuya Watari ◽  
Jianhua Fang ◽  
Xiaoxia Guo ◽  
Kazuhiro Tanaka ◽  
Hidetoshi Kita ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Sulfonic Acid ◽  
Vapor Permeation ◽  
Sulfonic Acid Groups ◽  
Permeation Properties

Synthesis and properties poly(arylene ether sulfone)s with pendant hyper-sulfonic acid

RSC Advances ◽  
2015 ◽  
Vol 5 (48) ◽  
pp. 38298-38307 ◽  
Author(s):  
Jinhui Pang ◽  
Sinan Feng ◽  
Haibo Zhang ◽  
Zhenhua Jiang ◽  
Guibin Wang
Keyword(s):  
Proton Conductivity ◽  
Dimensional Stability ◽  
Sulfonic Acid ◽  
Side Chains ◽  
High Proton Conductivity ◽  
Arylene Ether ◽  
High Proton ◽  
Sulfonic Acid Groups ◽  
Aromatic Side Chains

A novel poly(arylene ether sulfone)s with pendant multiple sulfonic acid groups on aromatic side chains was prepared by graft method, they displayed high proton conductivity and good dimensional stability.

Proton Conductivity under Dry Conditions for Mesoporous Silica with Highly Dense Sulfonic Acid Groups

2013 ◽  
Vol 117 (17) ◽  
pp. 8727-8736 ◽  
Author(s):  
Satoru Fujita ◽  
Kazuya Kamazawa ◽  
Satoru Yamamoto ◽  
Madhusudan Tyagi ◽  
Toru Araki ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Proton Conductivity ◽  
Sulfonic Acid ◽  
Dry Conditions ◽  
Sulfonic Acid Groups

Sulfonated aromatic copoly(ether–amide) membranes II

2017 ◽  
Vol 30 (4) ◽  
pp. 437-445 ◽  
Author(s):  
Wadi Elim Sosa-González ◽  
Ramón del Jesús Palí-Casanova ◽  
Yamile Pérez-Padilla ◽  
María Isabel Loría-Bastarrachea ◽  
José Luis Santiago-García ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Sulfonic Acid ◽  
Main Chain ◽  
Exchange Capacity ◽  
Proton Nuclear Magnetic Resonance ◽  
Polycondensation Reaction ◽  
Aromatic Diamines ◽  
Ion Exchange Capacity ◽  
Sulfonation Degree ◽  
Sulfonic Acid Groups

Several aromatic sulfonated copoly(ether–amide)s, based on the aromatic diamines 4,4′-(hexafluoroisopropylidene)bis(p-phenyleneoxy)-dianiline (HFD) and 2,4-diaminobenzensulfonic acid (DABS) and 4,4′-oxybis(benzoic acid) (OBA), were synthesized through a polycondensation reaction. The sulfonation degree was controlled by introducing different concentrations of 2,4-DABS from 40 mol% up to 80 mol%. Proton nuclear magnetic resonance validated the expected concentrations of sulfonic acid groups in the sulfonated aromatic copoly(ether–amide)s. Thermal decomposition of sulfonic groups was found to initiate at 280°C, while main chain decomposition initiates at 410°C. Proton conductivity between 30°C and 75°C was 19.0 and 45.0 mS/cm, respectively, for the copolymer with the highest concentration of sulfonic groups (–SO3H). Comparison with structurally similar sulfonated copolyamides and copoly(ether–amide)s indicates that these new sulfonated copoly(ether–amide)s based on 4,4′-OBA show improved mechanical properties, but a decrease in ion exchange capacity and proton conductivity.

Synthesis and basic properties of sulfonated polysulfone/phosphotungstic acid (H3O40PW12) composite proton exchange membrane

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Weidong Li ◽  
Guoping Fei ◽  
Jiongxin Zhao
Keyword(s):  
Proton Conductivity ◽  
Water Uptake ◽  
Sulfonic Acid ◽  
Phosphotungstic Acid ◽  
Great Influence ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Membrane Properties ◽  
Sulfonated Polysulfone ◽  
Sulfonic Acid Groups

AbstractThe sulfonated polysulfone/phosphotungstic acid (SPSU/PWA) composite membranes were investigated for proton exchange membranes. The influence of the interactions between sulfonic acid groups and phosphotungstic acid on the properties of composite membranes was studied in detail. The study showed that special interaction has great influence on the membrane properties. Fourier transform infrared (FTIR) spectroscopy of the composite membranes exhibited band shifts showing a possibility of intermolecular hydrogen bonding interaction between SPSU and PWA additives. SPSU/PWA composite membranes were evaluated for thermal stability, ion exchange capacity, water uptake and proton conductivity. Also the extraction of PWA from the composite membranes and their chemical stability were determined. Thermal analysis of the composites showed that it promotes the decomposition temperature of the sulfonic acid groups with increase in PWA weight content. Though the IEC and water uptake decreased with increase in PWA content, the proton conductivity of the composite membranes increased with increase in PWA content. The proton conductivity of the composites with 5 wt.%, 20 wt.% and 30 wt.% PWA is 2.62×10-2, 1.34×10-1 and 1.66×10-1 s·cm-1 at 80oC, respectively.

Proton conductivity of sulfonic acid functionalised mesoporous materials

2007 ◽  
Vol 99 (1-2) ◽  
pp. 190-196 ◽  
Author(s):  
Roland Marschall ◽  
Inga Bannat ◽  
Jürgen Caro ◽  
Michael Wark
Keyword(s):  
Proton Conductivity ◽  
Mesoporous Materials ◽  
Sulfonic Acid

scholarly journals Methoxylation of α-pinene over poly(vinyl alcohol) containing sulfonic acid groups

2009 ◽  
Vol 147 (2-3) ◽  
pp. 302-306 ◽  
Author(s):  
D.S. Pito ◽  
I.M. Fonseca ◽  
A.M. Ramos ◽  
J. Vital ◽  
J.E. Castanheiro
Keyword(s):  
Vinyl Alcohol ◽  
Sulfonic Acid ◽  
Poly Vinyl Alcohol ◽  
Sulfonic Acid Groups

Superprotonic Conductivity of a UiO-66 Framework Functionalized with Sulfonic Acid Groups by Facile Postsynthetic Oxidation

2015 ◽  
Vol 127 (17) ◽  
pp. 5231-5235 ◽  
Author(s):  
Won Ju Phang ◽  
Hyuna Jo ◽  
Woo Ram Lee ◽  
Jeong Hwa Song ◽  
Kicheon Yoo ◽  
...  
Keyword(s):  
Sulfonic Acid ◽  
Sulfonic Acid Groups

Do acid–base interactions really improve the ion conduction in a proton exchange membrane? – a study on the effect of basic groups

2019 ◽  
Vol 7 (34) ◽  
pp. 19820-19830 ◽  
Author(s):  
Yuqian Sui ◽  
Yexin Du ◽  
Huayuan Hu ◽  
Jieshu Qian ◽  
Xuan Zhang
Keyword(s):  
Physicochemical Properties ◽  
Sulfonic Acid ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Acid Base ◽  
Ion Conduction ◽  
Exchange Membrane ◽  
Sulfonic Acid Groups

Generating acid–base interactions between sulfonic acid groups in a proton exchange membrane (PEM) and the incorporation of basic groups are effective approaches to improving the physicochemical properties of a membrane.

Synthesis and characterisation of novel functional polyolefin containing sulfonic acid groups

2008 ◽  
Vol 44 (2) ◽  
pp. 475-482 ◽  
Author(s):  
Yi Zheng ◽  
Li Pan ◽  
Yan-Guo Li ◽  
Yue-Sheng Li
Keyword(s):  
Sulfonic Acid ◽  
Sulfonic Acid Groups
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