Unraveling the Complex Hydration Behavior of Ionomers under Thin Film Confinement
| Autor: | Christopher A. Rumble, Mark Maroncelli, Shudipto K. Dishari, Michael A. Hickner, Joseph A. Dura |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Materials science 02 engineering and technology Polymer Quartz crystal microbalance 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound General Energy Membrane chemistry Fuel cells Energy transformation sense organs Neutron reflectometry Physical and Theoretical Chemistry Thin film Composite material 0210 nano-technology Ionomer |
| Zdroj: | The Journal of Physical Chemistry C. 122:3471-3481 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | The mechanical and transport properties of submicron thick ionomer films are crucial in the study and understanding of the ionomer–catalyst interfaces in the porous electrodes of energy conversion and storage devices, such as fuel cells and batteries. Interestingly, ionomers in thin films behave differently from bulk ionomer membranes, and the behavior of these thin films is not well understood. The complex hydration behavior of thin ionomer films in the confined state is described in this work. Here, thin films (∼25–250 nm) of sulfonated Radel (S-Radel) were investigated to understand thickness and hydration effects on the density and mechanical properties of these sulfonated thin polymer films. The density values obtained from quartz crystal microbalance and spectroscopic ellipsometry showed a thickness trend similar to density values obtained from neutron reflectometry with thin films of ∼25 nm thickness having lower densities than thicker, ∼250 nm films. Thicker films were always more dense and less w... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|