The Ionic Conductivity of a Nafion® 1100 Series of Proton-exchange Membranes Re-cast from Butan-1-ol and Propan-2-ol
✍ Scribed by S. M. Slade; T. R. Ralph; C. Ponce de León; S. A. Campbell; F. C. Walsh
- Book ID
- 102216084
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 206 KB
- Volume
- 10
- Category
- Article
- ISSN
- 1615-6846
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✦ Synopsis
Abstract
The ionic conductivity of Nafion® 1100 extruded membranes re‐cast from solutions of butan‐1‐ol and propan‐2‐ol is measured in 0.5 mol dm^–3^ H~2~SO~4~ at 295 K, using an immersed, four‐electrode d.c. technique. The general trend is an increasing conductivity for the thicker membranes. Materials which were solution‐cast from butan‐1‐ol yielded the highest conductivity while a series of membranes with lower conductivities (similar to those of an extruded Nafion® 1100 series of membranes) was found using propan‐2‐ol. The conductivity results indicate that membranes manufactured by extrusion and casting from various solvents might have different structures. Differences in the water content and conductivity of the membranes are considered to arise from the impact of processing conditions on the surface and bulk structure of the membranes.