Morphology and Diffusion Behaviour of Nafion and SPEEK

R. J. Wang, M. Li, C. J. Liu, X. Q. He, X. D. You

2018

Abstract

Phase separation morphology and diffusion properties of Nafion and SPEEK were investigated in this study. Nafion and SPEEK PEMs had been prepared by solution casting procedure. TEM image of Nafion membrane shows a preferable continuous proton conductive channels with 3-5 nm width distributed in hydrophobic matrix, while SPEEK exhibits poor phase separation morphology with isolated clusters (1 nm in width) morphology. Radial distribution function of S-S for Nafion exhibits a much more intensive S-S peak than that of SPEEK, suggesting that the agglomeration of hydrophilic domains, represented by sulfonate groups, in SPEEK is worse than that in Nafion matrix, which might be attributed to the lower electronegativity of H than that of F and higher steric hindrance of SPEEK backbone. The corresponding hydrophilic cluster morphology of Nafion and SPEEK membranes with different hydration level were explored by MD simulation. SPEEK possessed much smaller hydrophilic channels than that of Nafion especially at low hydration level. And consequently, much lower mobility of H2O and H3O+ are revealed for SPEEK.

Paper Citation

in Harvard Style

Wang R., Li M., Liu C., He X. and You X. (2018). Morphology and Diffusion Behaviour of Nafion and SPEEK.In Proceedings of the International Workshop on Materials, Chemistry and Engineering - Volume 1: IWMCE, ISBN 978-989-758-346-9, pages 552-557. DOI: 10.5220/0007441405520557

in Bibtex Style

@conference{iwmce18,
author={R. J. Wang and M. Li and C. J. Liu and X. Q. He and X. D. You},
title={Morphology and Diffusion Behaviour of Nafion and SPEEK},
booktitle={Proceedings of the International Workshop on Materials, Chemistry and Engineering - Volume 1: IWMCE,},
year={2018},
pages={552-557},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007441405520557},
isbn={978-989-758-346-9},
}

in EndNote Style

TY - CONF

JO - Proceedings of the International Workshop on Materials, Chemistry and Engineering - Volume 1: IWMCE,
TI - Morphology and Diffusion Behaviour of Nafion and SPEEK
SN - 978-989-758-346-9
AU - Wang R.
AU - Li M.
AU - Liu C.
AU - He X.
AU - You X.
PY - 2018
SP - 552
EP - 557
DO - 10.5220/0007441405520557