SEBS-ionic liquid block-graft copolymer-based membranes with high compatibility for improved gas separation

Lee, Chang Oh; Jo, Jin Hui; Ryu, Gun Young; Jae, Hyunmo; Roh, Dongkyu; Seok, Won

doi:10.1016/j.eurpolymj.2022.111309

Cited by 7 publications

(2 citation statements)

References 64 publications

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“…Unlike the other samples, pristine SEBS exhibited an additional broad halo peak at 2θ = 11.8°, which was not observed after functionalization. This observation suggests a shift from a bimodal distribution of polymer chain domains to a unimodal one . SEBS is known to consist of hard and soft domains, where the polystyrene blocks represent the hard segments and the ethylene/butylene blocks represent the soft segments.…”

Section: Results and Discussionmentioning

confidence: 99%

“…This observation suggests a shift from a bimodal distribution of polymer chain domains to a unimodal one. 41 SEBS is known to consist of hard and soft domains, where the polystyrene blocks represent the hard segments and the ethylene/butylene blocks represent the soft segments. Both soft and hard segments form solid polymer mesophases.…”

Section: Electrolyte Uptake and Morphologymentioning

confidence: 99%

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Carboxylated Polystyrene-b-poly(ethylene-ran-butylene)-b-polystyrene Membranes for Alkaline Water Electrolysis

Serhiichuk,

Tian,

Almind

et al. 2024

ACS Appl. Energy Mater.

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A series of membranes based on carboxylated polystyrene-b-poly(ethylene-ran-butylene)-b-polystyrene (SEBS) were synthesized via Friedel−Crafts bromoalkylation, substitution with malonate esters, and heterogeneous ester hydrolysis. The physicochemical properties of the obtained membranes, including electrolyte uptake, swelling ratio, and ionic conductivity, were highly affected by the degree of functionalization and the concentration of the aqueous KOH solution. Membranes with degrees of functionalization higher than 100% suffered from excessive swelling and poor mechanical stability. However, membranes with degrees of functionalization in the range of 50−75% combined high electrolyte uptake and ion conductivity with mechanical robustness. The area specific resistance during electrolysis testing in 15 wt % aqueous KOH at 80 °C was 0.18 Ω cm 2 after 1 week, with no signs of degradation. The H 2 in the O 2 level at 50 mA cm −2 was about 0.5%, which was considerably lower than that of Zirfon despite being four times thinner.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Electrolyte Uptake and Morphologymentioning

confidence: 99%