Fast Proton Conduction Facilitated by Minimum Water in a Series of Divinylsilyl-11-silicotungstic Acid-co-Butyl Acrylate-co-Hexanediol Diacrylate Polymers
| Autor: | Michael A. Yandrasits, Hui Ren, Lauren F. Greenlee, James L. Horan, Sonny Sachdeva, Mei Chen Kuo, Soenke Seifert, Andrew M. Herring, Matthew H. Frey, Steven J. Hamrock, Anitha Lingutla, Yuan Yang |
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| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Proton Facilitated diffusion Butyl acrylate Diffusion 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound General Energy Membrane chemistry Proton transport Organic chemistry Physical and Theoretical Chemistry 0210 nano-technology Nuclear chemistry |
| Zdroj: | The Journal of Physical Chemistry C. 118:135-144 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp4089657 |
| Popis: | Studies of proton transport in novel materials are important to enable a large array of electrochemical devices. In this study, we show that heteropoly acids (HPAs) when immobilized in polymer matrixes have highly mobile protons. Divinyl-11-silicotungstic acid, an HPA, was copolymerized with butyl acrylate and hexanediol diacrylate at various weight percentage loadings from 25% to 85% using UV initiated polymerizations. The resultant films were tan colored flexible sheets of ca. 120 μm thickness. The morphology of these films varied with loading, showing phase separation into clustered HPA above a 50 wt % loading and lamella morphologies above an 80 wt % loading. Water uptake was strongly associated with the HPA clusters, which facilitated transport of protons. This was realized by proton conductivities as high as 0.4 S cm–1 at 95 °C and 95% RH and 0.1 S cm–1 at 85 °C and 50% RH. Pulse field gradient spin echo NMR measurements indicated that water self-diffusion was fast (1.4 × 10–5 and 4.4 × 10–5 cm2 s–1... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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