Ionic Conduction in Nanostructured Membranes Based on Polymerized Protic Ionic Liquids
| Autor: | Rachel A. Segalman, Megan L. Hoarfrost, Miguel A. Modestino, Yanika Schneider, Robert W. Hess, Bryan McCulloch |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Polymers and Plastics Small-angle X-ray scattering Organic Chemistry Ionic bonding Inorganic Chemistry chemistry.chemical_compound Membrane chemistry Chemical engineering Ionic liquid Polymer chemistry Materials Chemistry Copolymer Trifluoroacetic acid Ionic conductivity Methacrylamide |
| Zdroj: | Macromolecules. 46:1543-1548 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/ma3024624 |
| Popis: | Polymerized ionic-liquids (PILs) are promising materials whose ionic properties can be tuned based on their chemistry. By incorporating PILs into block copolymer (BCP) structures, it is possible to provide complementary functionality (i.e., structural stability) and transport tunability to ion-conducting materials. In this study, we describe the self-assembly and conductivity of novel poly(styrene-block-histamine methacrylamide) diblock copolymers (PS-b-PHMA) and the resulting PS-b-PIL derivatives obtained after treatment with trifluoroacetic acid (TFA). These materials self-assemble into ordered BCP structures with tunable domain sizes as demonstrated by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). PS-b-PHMA membranes show conductivities up to 2 × 10–4 S/cm at room temperature, which increase by an order of magnitude in the presence of acid. In addition, both PHMA- and PIL-based membranes exhibit lower water uptake (λ = 4–6 and 8–10, respectively) in comparison with mos... |
| Databáze: | OpenAIRE |
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