Three-Component Domains in the Fully Hydrated Nafion Membrane Characterized by Partial Scattering Function Analysis

Three-Component Domains in the Fully Hydrated Nafion Membrane Characterized by Partial Scattering Function Analysis

A fully hydrated Nafion membrane is generally treated as a three-component system comprising the tetrafluoroethylene-like main chain, the fluorinated side chain ending with a sulfonic acid group, and absorbed water. We applied the contrast variation small-angle neutron scattering technique to decomp...

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Veröffentlicht in:Macromolecules 2021-05, Vol.54 (9), p.4128-4135
Hauptverfasser: Zhao, Yue, Yoshimura, Kimio, Motegi, Toshinori, Hiroki, Akihiro, Radulescu, Aurel, Maekawa, Yasunari
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container_end_page 4135
container_issue 9
container_start_page 4128
container_title Macromolecules
container_volume 54
creator Zhao, Yue
Yoshimura, Kimio
Motegi, Toshinori
Hiroki, Akihiro
Radulescu, Aurel
Maekawa, Yasunari
description A fully hydrated Nafion membrane is generally treated as a three-component system comprising the tetrafluoroethylene-like main chain, the fluorinated side chain ending with a sulfonic acid group, and absorbed water. We applied the contrast variation small-angle neutron scattering technique to decompose scattering intensity profiles to partial scattering functions (PSFs) of each component in Nafion quantitatively. In the large scale (>30 nm), structural heterogeneities were observed in the main- and side-chain domains but not in water domains. In the middle scale (5–30 nm), a bicontinuous-like structure of crystalline and amorphous phases with a mean separation distance of 11 nm was observed, as a result of the main-chain semicrystalline templating effect. In the small scale (
doi_str_mv 10.1021/acs.macromol.1c00587
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