| Autor: |
Hao, Lam Hoang, Tap, Tran Duy, Hieu, Dinh Tran Trong, Korneeva, Ekaterina, Van Tiep, Nguyen, Yoshimura, Kimio, Hasegawa, Shin, Sawada, Shin‐ichi, Van Man, Tran, Hung, Nguyen Quang, Tuyen, Luu Anh, Dinh, Van‐Phuc, Luan, Le Quang, Maekawa, Yasunari |
| Předmět: |
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| Zdroj: |
Journal of Applied Polymer Science; 4/10/2022, Vol. 139 Issue 14, p1-16, 16p |
| Abstrakt: |
The morphology and elemental compositions at the surface of poly(styrene sulfonic acid) (PSSA) grafted poly(ethylene‐co‐tetrafluoroethylene) polymer electrolyte membranes (ETFE‐PEMs) in a grafting degree (GD) range of 0%–127% are investigated by using FE‐SEM and XPS analyses. The concentrations of elemental components at the surface are not a linear function of GDs, resulting from different grafting speeds at the surface and bulk. In addition, low accumulation of PSSA grafts on the surface of ETFE‐PEMs in the low GDs of 0%–19%, as well as their homogeneous distribution through the membranes at least at a GD of 19% are observed. At higher GDs of 19%–127%, the PSSA accumulation on the surface is relatively limited, indicating the presence of more PSSA grafts inside the bulk than on the surface. The surface signatures of ETFE‐PEMs over the entire GD range can be determined based on the grafting process. These interesting observations suggest the significant advantages of interfacial properties of ETFE‐PEMs for fuel cell applications. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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