Preparation of high styrenic sulfonated polySEPS/clay composite film for proton exchange membranes (PEMs) |
| |
Authors: | Suk-Yong Jang Sien-Ho Han |
| |
Affiliation: | Graduate School of Knowledge Based Technology and Energy, Korea Polytechnic University, 2121, Jungwang-Dong, Shihung-City, Kyonggi-Do 429-450, Republic of Korea |
| |
Abstract: | High styrenic sulfonated polystyrene-block-poly(ethyl-ran-propylene)-block-polystyrene (S-polySEPS) containing 65% styrene groups was prepared by sulfonation at the phenyl group. Also, S-polySEPS/clay composite film was produced by mixing organic clay with S-polySEPS in organic blending solvent (THF/DCE/IPA). The proton conductivity of the pure S-polySEPS film and S-polySEPS/clay composite films was ranged from 10?2 to 10?1 S cm?1. In particular, the S-polySEPS/clay 1 wt% composite film was shown higher proton conductivity, higher ion exchange capacity (IEC) and lower water uptake than Nafion® 117 membrane. However, the proton conductivity of the S-polyseps/clay composite films slightly was decreased with increasing the contents of organic clay. Thermogravimetric analysis (TGA) was carried out to investigate the thermal stability of S-polySEPS/clay composite films. The 1H NMR and FT-IR analysis is used to verify the sulfonation reaction on the phenyl groups of S-polySEPS. The micro-phase separated images and dispersed organic clay state of the prepared films were confirmed by transmission electron microscopy (TEM) and X-ray diffraction (XRD). |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|