Synthesis and characterization of highly fluorinated sulfonated polytriazoles for proton exchange membrane application

Singh, Asheesh Kumar; Banerjee, Susanta; Komber, Hartmut; Voit, Brigitte

doi:10.1039/c5ra26821d

Cited by 22 publications

(118 citation statements)

References 36 publications

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“…Chang and coworkers prepared sulfonated polytriazoles for PEM application, which showed high proton conductivity (107 mS cm − 1 ) (33). Our group has also prepared several fluorinated sulfonated polytriazoles and their PEM properties have been investigated (35)(36)(37). In the present work, we have increased the IEC w values of the polymers by designing the new polytriazole copolymers with smaller repeat unit structures.…”

Section: Introductionmentioning

confidence: 94%

“…Con centrated sulfuric acid (95%), diphosphorous pentaoxide (P 2 O 5 ), acetonitrile (CH 3 CN) and aqueous ammonia solution (25%) were purchased from E. Merck (India). 4,4′(Per fluoropropane2,2diyl)bis((prop2ynyloxy)benzene (TF) monomer was synthesized according to reported procedure (36). DMF was purified by stirring with NaOH and distilled from P 2 O 5 under reduced pressure before use.…”

Section: Methodsmentioning

confidence: 99%

“…The experimental IEC w values of the acidified membranes were also determined by both titri metric and 1 HNMR analysis. The volumetric ion exchange capacities (IEC v ) of the membranes in dry and wet states were obtained by multiplying the density of the membrane with the IEC w , and by considering the water uptake of the membranes, respectively (35,36). The water uptake and dimensional change of the samples were measured accord ing to a previously reported method (35,36).…”

Section: Preparation Of the Sulfonated Polytriazole Copolymer Membranesmentioning

confidence: 99%

“…The PTFOSXX copolymers were synthesized by the same procedure as described in the earlier reports as shown in the Scheme 2 (35)(36)(37) cooling to room temperature, the polymer solution was pre cipitated out in 250 ml isopropanol. The resulting fibrous polymers were washed with 20% aqueous ammonia solu tion and deionized water, and dried at 100°C for overnight under vacuum.…”

Section: Synthesis Of Sulfonated Polytriazole Copolymersmentioning

confidence: 99%

“…Therefore, many efforts have been made in order to replace these materials. Several hydro carbon basedsulfonated aromatic PEM materials, such as sulfonated poly(arylene ether sulfone)s (9)(10)(11)(12)(13)(14)(15), sulfonated poly(arylene ether ketone)s (16)(17)(18)(19), sulfonated polyimides (20)(21)(22)(23)(24)(25), sulfonated poly(benzimidazole)s (26)(27)(28), sul fonated polybenzothiazoles (29)(30)(31) and sulfonated poly triazoles (32)(33)(34)(35)(36)(37), have been developed in the recent years. It is well known, that the hydrocarbonbased sulfonated aromatic copolymers display lower proton conductivity in comparison to the perfluoro sulfonated polymers, due to poor phase separation between the hydrophilic and hydrophobic domains and the weak acidic nature of SO 3 H group (38).…”

Section: Introductionmentioning

confidence: 99%

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Hexafluoroisopropylidene based sulfonated new copolytriazoles: investigation of proton exchange membrane properties

et al. 2017

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A series of novel sulfonated polytriazole copoly mers (PTFOSHXX) was successfully prepared by the click reaction of 4,4′(perfluoropropane2,2diyl)bis((prop 2ynyloxy)benzene (TF), 4,4′diazido2,2′stilbene disul fonic acid disodium salt (SAZ) and 4,4′diazidodiphenyl ether (OAZ). The copolymers were characterized by Fourier transform infrared (FTIR) and proton nuclear magnetic resonance (NMR) spectroscopy. The copolymers showed high mechanical, thermal and oxidative stability and low swelling. The phase separated morphology of the mem branes was confirmed from transmission electron micros copy (TEM). The membranes showed proton conductivity as high as 110 and 122 mS cm − 1 at 80 and 90°C, respec tively depending on the polymer repeat unit structure.

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Section: Introductionmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 99%

Section: Preparation Of the Sulfonated Polytriazole Copolymer Membranesmentioning

confidence: 99%

Section: Synthesis Of Sulfonated Polytriazole Copolymersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hexafluoroisopropylidene based sulfonated new copolytriazoles: investigation of proton exchange membrane properties

et al. 2017

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Synthesis and characterization of new sulfonated copolytriazoles and their proton exchange membrane properties

Roy

Saha

Kumar

et al. 2019

J of Applied Polymer Sci

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This work reports the synthesis and characterization of a series of new sulfonated copolytriazoles. The polymers were prepared by CuI catalyzed 1,3‐cycloaddition reaction of an equimolar amount of a dialkyne monomer, 1,3‐diethynylbenzene and a mixture of two diazide monomers, namely, 4,4′‐diazidodiphenyl ether and 4,4′‐diazido‐2,2′‐stilbenedisulfonic acid disodium salt. The copolymers showed high inherent viscosity indicating the formation of high molar mass product. The copolymers were characterized by Fourier transform infrared and proton nuclear magnetic resonance spectroscopic techniques. The copolymer membranes displayed moderate water uptake, high dimensional, mechanical, and thermal stability. Transmission electron microscopy micrographs displayed excellent phase‐separated morphology along with very fine ionic clusters. The copolymer PTEOSH‐90 (90% degree of sulfonation) showed much higher proton conductivity value which is up to 196 mS cm−1 at 80 °C in completely hydrated condition compared to that of Nafion (165 mS cm−1). © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48514.

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Flexible Diazide Based Sulfonated Polytriazoles and Their Proton Exchange Membrane Properties

Saha

Banerjee

Komber

et al. 2017

Macro Chemistry & Physics

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The preparation, characterization, and property evaluation of a series of new semifluorinated polytriazoles (PTEHSH‐XX) with various degrees of sulfonation is described. The polymers are synthesized by the click polymerization reaction of a mixture of a new diazide monomer, 1,4‐bis‐[{2′‐trifluromethyl 4′‐(4″‐azidophenyl)phenoxy}]phenyl, and a sulfonated monomer, 4,4′‐diazido‐2,2′‐stilbenedisulfonic acid disodium salt, with an equimolar amount of a dialkyne monomer, 1,3‐diethynylbenzene. The polytriazoles are characterized by Fourier transform infrared spectroscopy (FTIR) and NMR spectroscopic techniques. The polytriazoles show good solubility in selective organic solvents and film forming ability. The films prepared from these polymers show high thermal and chemical stability, low water uptake, high dimensional stability, and excellent mechanical properties. The transmission electron microscopy images of these polymers exhibit a uniformly phase separated morphology. The polymers show very high proton conductivity and the values are within the range of 27–118 mS cm−1 at 30 °C, 53–225 mS cm−1 at 80 °C, and 58–235 mS cm−1 at 90 °C in hydrated condition.

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Synthesis and characterization of highly fluorinated sulfonated polytriazoles for proton exchange membrane application

Abstract: A series of polytriazole copolymers were synthesized by the click polymerization of fluorinated dialkyne with a mixture of two different diazide monomers and the proton exchange membrane properties of the copolymers were investigated.

Cited by 22 publications

References 36 publications

Hexafluoroisopropylidene based sulfonated new copolytriazoles: investigation of proton exchange membrane properties

Hexafluoroisopropylidene based sulfonated new copolytriazoles: investigation of proton exchange membrane properties

Synthesis and characterization of new sulfonated copolytriazoles and their proton exchange membrane properties

Flexible Diazide Based Sulfonated Polytriazoles and Their Proton Exchange Membrane Properties

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