New sulfonated polynaphthylimides: Synthesis and investigation

Rusanov, A. L.; Булычева, Е. Г.; Bugaenko, M. G.; Leikin, A. Yu.; Шевелев, С. А.; Дутов, М. Д.; Serushkina, O. V.; Voitekunas, V. Yu.; Abadi, Marziyeh Hossein

doi:10.1134/s1811238209010020

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…This shortcoming can be overcome by converting polyimides into sulfonated polyimides with the introduction of sulfonic acid groups, which makes polymer chains hydrophilic. 25 By the introduction of hydrophilic sulfonate groups into the PI main chain, improved hydrophilicity resulted in higher absorption of water and better ion exchange properties. The hydrophilic sulfonic acid group, an anionic functional group, exhibits strong affinity toward heavy metal ions.…”

Section: Introductionmentioning

confidence: 99%

“…However, because of their weak hydrophilicity, PIs have not been used as adsrobents for heavy metals. This shortcoming can be overcome by converting polyimides into sulfonated polyimides with the introduction of sulfonic acid groups, which makes polymer chains hydrophilic . By the introduction of hydrophilic sulfonate groups into the PI main chain, improved hydrophilicity resulted in higher absorption of water and better ion exchange properties.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Sulfonated Copolyimides by Thermal Imidization for Efficient Lead Ion Adsorption from Aqueous Media

Manzoor

Kalsoom

Khan

et al. 2022

ACS Appl. Polym. Mater.

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Thermally stable, high performance sulfonated copolyimide adsorbents [OBM (ODPA+BDSA•TEA+MDA) and FBM (6FDA+BDSA•TEA+MDA)] having excellent adsorption ability were prepared via a two-step thermal imidization reaction. By the introduction of hydrophilic sulfonic acid groups into the polyimide backbone, the material's hydrophilicity was improved. The anionic sulfonate group bears strong affinity toward heavy metal ions. Improvement in polymer hydrophilicity enhances the heavy metal ion adsorption capacity due to feasible access to adsorption sites. Atomic absorption spectroscopy (AAS) was employed for heavy metal ion adsorption studies. In addition, quantum chemistry calculations using Molecular Operating Environment (MOE) software were performed, to scrutinize the experimental results for molecular surface studies. A good correlation was observed between computational and experimental findings. OBM was demonstrated to be more effective for Pb(II) removal from aqueous media with a higher q e and percent removal as compared to FBM. The synthesized sulfonated copolyimides are potential adsorbents for heavy metal ions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of Sulfonated Copolyimides by Thermal Imidization for Efficient Lead Ion Adsorption from Aqueous Media

Manzoor

Kalsoom

Khan

et al. 2022

ACS Appl. Polym. Mater.

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“…Over the past few decades, hundreds of low-cost sulfonated polymers, such as sulfonated polyether-ether-ketone [15][16][17][18][19][20], sulfonated polyether sulfone [21][22][23][24][25][26][27][28][29][30][31], and sulfonated polynaphthylimides with different chemical structures, have been synthesized for PEMFCs applications [28,29,32]. Among them, sulfonated polynaphthylimides (SPIs) have attracted considerable attention because of their low cost, excellent physical properties, high methanol gas barrier ability, high thermal stability, and easy-to-adjust chemical structure [33][34][35][36]. However, the unsatisfied stability of SPI membrane in a fuel cell under high temperature and high humidity conditions cannot be ignored [37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Effect of Chemical Structure and Degree of Branching on the Stability of Proton Exchange Membranes Based on Sulfonated Polynaphthylimides

et al. 2020

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Hydrolytic stability and oxidative stability are the core properties of sulfonated polynaphthylimides (SPIs) as proton exchange membranes. The chemical structure of SPIs directly influences the performance. Herein, three different series of branched SPIs were designed and prepared using 1,3,5-tris (2-trifluoromethyl-4-aminophenoxy) benzene as a trifunctional monomer and three non-sulfonated diamine monomers, such as 4,4′-oxydianiline (ODA), 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane (6FODA), and 4,4′-(9-fluorenylidene)dianiline (BFDA). The effect of the chemical structure and degree of branching on SPIs properties is discussed. The results showed that by controlling the chemical structure and degree of branching, the chemical stability of SPIs changed significantly. SPI-6FODA with two ether linkages and a hydrophobic CF3 group has higher hydrolytic stability than SPI-ODA with only one ether linkage. In addition, with the increase of the introduced B3 monomer, the oxidation stability of SPI-6FODA has been greatly improved. We successfully synthesized SPIs with a high hydrolytic stability and oxidative stability.

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“…However, one of the major drawbacks of polyimides are the lack of proton conductivity. This shortcoming can be overcome by converting polyimide into sulfonated polyimides with the introduction sulfonic acid group, which not only promotes proton conduction, but also makes the polymer chain hydrophilic [16]. However, the hydrolytic stability of these sulfonated polyimides, which is associated with its mechanical stability in a strongly swelled state and its robustness in fuel cell conditions, is compromised due to the presence of a sulfonic acid group.…”

Section: Introductionmentioning

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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New sulfonated polynaphthylimides: Synthesis and investigation

Cited by 5 publications

References 15 publications

Synthesis of Sulfonated Copolyimides by Thermal Imidization for Efficient Lead Ion Adsorption from Aqueous Media

Synthesis of Sulfonated Copolyimides by Thermal Imidization for Efficient Lead Ion Adsorption from Aqueous Media

Effect of Chemical Structure and Degree of Branching on the Stability of Proton Exchange Membranes Based on Sulfonated Polynaphthylimides

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

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