Abstract
In order to perform a critical analysis of the zirconium oxide effects in sulfonated poly(ether ether ketone) (SPEEK) membranes with two sulfonation degrees (SD), 71 and 87%, the characterization of composite membranes prepared with a systematic variation of the inorganic content is proposed. The method involves preparation of inorganic composite membranes with a wide range of properties which concern water swelling, chemical and thermal stability, methanol and water permeations and, finally, proton conductivity. A good balance between high proton conductivity, good chemical stability and low methanol permeability is reached for the SPEEK polymer with a 7.5% (w/w) ZrO2 content and SD=87%. Compared to NAFION®112, this membrane is 3-times more selective towards water/methanol permeation and has a similar proton conductivity (81 compared to 88 mS/cm).
| Original language | English (US) |
|---|---|
| Pages (from-to) | 587-591 |
| Number of pages | 5 |
| Journal | Materials Science Forum |
| Volume | 455-456 |
| State | Published - 2004 |
| Externally published | Yes |
| Event | Advanced Materials Forum II: Proceedings of the II International Materials Symposium: Materials 2003 and XI Encontro da Sociedade Portugesa de Materials, 2003 ATERIAIS - Caparica, Portugal Duration: Apr 14 2003 → Apr 16 2003 |
Keywords
- Direct methanol fuel cell (DMFC)
- Methanol crossover
- Proton conductivity
- Sulfonated poly(ether ether ketone) (SPEEK)
- Zirconium oxide
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering