Sulfonated copolyimides containing trifluoromethyl and phosphine oxide moieties: Synergistic effect towards proton exchange membrane properties

Mandal, Amritlal; Bisoi, Soumendu; Banerjee, Susanta; Komber, Hartmut; Voit, Brigitte

doi:10.1016/j.eurpolymj.2017.08.050

Cited by 22 publications

(61 citation statements)

References 32 publications

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“…Thus, increasing the percentage of s-SNPs (THSPSA) increases the number of hydrophilic domains, and consequently, the oxidative stability of the hybrid membranes with higher filler loading decreases. However, due to the formation of the crosslinked and interpenetrating network structure, the hybrid membrane, even with 10 wt% filler, showed excellent oxidative stability, compared to many other pristine membrane materials (24,44,46). On the other hand, the -CF 3 groups in QBF and the wholly aromatic nature of the copolymers are mainly responsible for enhancing the oxidative stability and making them resistant toward attack by the oxidative species (49).…”

Section: Resultsmentioning

confidence: 99%

“…Over the past few decades, a perfluorosulfonic acid polymer such as Nafion ® is the most cited PEM material due to its high proton conductivity and good chemical and mechanical stabilities (1,2). But high gas permeability, low operating temperature (<80°C), and high cost of the Nafion ® membrane have led to rigorous research efforts in the development of an alternative aromatic semifluorinated sulfonated polymer, such as poly(arylene ether)s (3)(4)(5), poly(arylene ether sulfone)s (6)(7)(8)(9)(10)(11)(12), poly(aryl ether ether nitrile)s (13), poly(arylene sulfide sulfone)s (14,15), poly(arylene ether ketone)s (16)(17)(18), poly(aryl ether ether ketone)s (19,20), poly(aryl ether ether ketone ketone)s (21,22), polyimides (23,24), polytriazoles (25,26), and polybenzimidazoles (27,28).…”

Section: Introductionmentioning

confidence: 99%

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

2020

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Sulfopropylated 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.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2020

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“…The oxidative stability of SAm-PEEK-x membranes was measured by observing their breaking behaviors in Fenton's reagent at 80 C. This method is regarded as one of the standard tests to gauge relative oxidative stability and to simulate accelerated fuel cell operating conditions. 33 As shown in Table 1, the breaking time of these membranes except for SAm-PEEK-0.8 with excessive swelling ratio was in the range from 137 min to 210 min, indicating the high oxidative stability of SAm-PEEK-x membranes. Moreover, the hydrolytic stability of SAm-PEEK-0.6 was evaluated by soaking the membrane into water for 2 weeks.…”

Section: Oxidative Thermal and Mechanical Stabilitiesmentioning

confidence: 89%

Poly(ether ether ketone) grafted with sulfoalkylamine as proton exchange membrane

Shao

Zhao

2018

High Performance Polymers

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A series of side-chain-type sulfonated poly(arylene ether ketone)s with high ion exchange capacity (IEC) values were prepared by polycondensation reaction of 4,4′-difluorobenzophenone with 2,2′-bis(3-amino-4-hydroxyphenyl) and bisphenol A, followed by post-grafting reaction using 1,4-butanesultone. For these obtained membranes, sulfoalkylamine functionalized poly(ether ether ketone) (SAm-PEEK)-0.8 with the highest IEC of 3.42 mequiv. g−1 displayed the highest proton conductivity of 0.11 S cm−1 at 25°C and 0.167 S cm−1 at 60°C, respectively. The morphology of these membranes was investigated by transmission electron microscope analysis. The result showed that these membranes exhibited well-connected hydrophilic channels due to their high IEC values and densely populated flexible acid side chains. Owing to their low methanol permeability and high selectivity, SAm-PEEK- x membranes are promising candidates for direct methanol fuel cell applications.

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“…To study the oxidative stability, NSPI membranes were dissolved into Fenton reagent at RT, following a previously described method [22].…”

Section: Oxidative Stabilitymentioning

confidence: 99%

Sulfonated Polyimide Membranes Derived from a Novel Sulfonated Diamine with Pendant Benzenesulfonic Acid for Fuel Cells

Liaqat¹,

Fazil²,

Rehman

et al. 2021

Energies

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For improving the hydrolytic stability of sulfonated polyimides consisting of five membered anhydrides, novel sulfonated polyimides (NSPIs) were prepared via polymerization of 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA), with a novel diamine monomer with a pendant sulfonic acid group and 4,4-oxydianiline. Water uptake of this NSPI with an excellent film-forming ability was almost equal to that of Nafion® 117, while their ion exchange capacity (IEC) was 22% higher than Nafion® 117. The loss in weight decreased by 53% and loss in IEC decreased by 66% compared to that of Nafion® 117; both were used to quantitatively measure hydrolytic stability, and radical oxidative stability also increased by 75% when compared with Nafion® 117. Mechanically, this NSPI was superior, and its proton conductivity was higher than Nafion® 117 at elevated temperatures. All these improvements were due to the introduction of this pendant group. Taken together, we herein report a promising renewable energy source based on SPIs capable of displaying proton conductivity and enhanced hydrophilicity.

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Sulfonated copolyimides containing trifluoromethyl and phosphine oxide moieties: Synergistic effect towards proton exchange membrane properties

Cited by 22 publications

References 32 publications

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

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

Poly(ether ether ketone) grafted with sulfoalkylamine as proton exchange membrane

Sulfonated Polyimide Membranes Derived from a Novel Sulfonated Diamine with Pendant Benzenesulfonic Acid for Fuel Cells

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