Synthesis and thermomechanical characteristics of zwitterionic poly(arylene ether sulfone) copolymers

Yang, Yi; Behbahani, Hoda Shokrollahzadeh; Morgan, Brian; Beyer, Frederick L.; Hocken, Alexis; Green, Matthew D.

doi:10.1016/j.polymer.2022.125522

Cited by 3 publications

(2 citation statements)

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“…The functionalization of PSfs with cationic groups through processes like grafting has been shown to reduce the affinity of the polymer surface for contaminants and therefore increases membrane performance. 8,9 Cationic PSfs are also interesting for their ability to serve as anion exchange membranes. Materials in which the cationic functionalities are paired with hydroxide counterions have demonstrated good hydroxide ion conductivity, making them promising materials for applications including anion exchange membrane fuel cells.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the hydrophobic nature of PSfs, they are prone to fouling during use in membrane purification applications. The functionalization of PSfs with cationic groups through processes like grafting has been shown to reduce the affinity of the polymer surface for contaminants and therefore increases membrane performance. , Cationic PSfs are also interesting for their ability to serve as anion exchange membranes. Materials in which the cationic functionalities are paired with hydroxide counterions have demonstrated good hydroxide ion conductivity, making them promising materials for applications including anion exchange membrane fuel cells. , While numerous cationic groups are available, quaternary ammonium groups are often favored due to the variety of chemistries and high stabilities that can be achieved. , …”

Section: Introductionmentioning

confidence: 99%

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Polydiallylammonium-Polysulfone Multiblock Copolymers for Moisture-Swing Direct Air Capture of Carbon Dioxide

Biery,

Shokrollahzadeh Behbahani,

Green

et al. 2024

ACS Appl. Polym. Mater.

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Polysulfones are an important class of materials for a variety of applications due to their excellent strength and thermal stability. Quaternary ammonium polymers are also useful materials due to their ion exchange properties, and such materials with alkaline counterions have been used to capture carbon dioxide (CO 2 ) from ambient air through a moisture-driven mechanism. Herein, we design sulfone-based multiblock copolymers containing ammonium functionalities and demonstrate their potential for CO 2 capture. Specifically, a series of multiblock copolymers containing both polydiallyldimethylammonium (PDADMA) and polysulfone (PSf) blocks were synthesized. PSf blocks provide mechanical integrity, while the PDADMA blocks enable the direct air capture of CO 2 . Multiblock copolymers were synthesized at high yield, and PDADMA(OH)-PSf copolymer films with good flexibility and strength were formed with IECs of 424 μmol/g (17 mol % PDADMA(OH)), 1407 μmol/g (44 mol % PDADMA(OH)), and 1726 μmol/g (50 mol % PDADMA(OH)). Thermogravimetric analysis was used to determine that all films are thermally stable up to 345 °C. Differential scanning calorimetry revealed that the 17 and 44 mol % functionalized PDADMA(OH)-PSf multiblock copolymers showed one T g at 185 °C and 50 mol % PDADMA(OH)-PSf polymer showed a T g at 183 °C and a second T g at 16 °C. Atomic force microscopy showed that the multiblock polymers exhibit disordered phase separation. The copolymer materials displayed moisture-swing direct air capture of CO 2 , opening up pathways to utilize polymer architecture and chemistry to tailor the properties of promising sorbents.

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Section: Introductionmentioning

confidence: 99%