Controlling surface chemistry and mechanical properties of metal ionogels through Lewis acidity and basicity
| Autor: | Alex P. S. Brogan, Jason P. Hallett, Richard P. Matthews, Coby J. Clarke |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Technology
Energy & Fuels Materials Science chemistry.chemical_element Materials Science Multidisciplinary 02 engineering and technology Zinc 0915 Interdisciplinary Engineering 010402 general chemistry 01 natural sciences Metal chemistry.chemical_compound Molecular dynamics Brittleness General Materials Science 0912 Materials Engineering chemistry.chemical_classification Science & Technology Chemistry Physical Renewable Energy Sustainability and the Environment 0303 Macromolecular and Materials Chemistry General Chemistry Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences Chemistry Chemical state chemistry Chemical engineering visual_art Physical Sciences Ionic liquid visual_art.visual_art_medium 0210 nano-technology Ethylene glycol |
| Zdroj: | Journal of Materials Chemistry A. 9:4679-4686 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/d0ta11821d |
| Popis: | Ionogels are emerging as soft materials with remarkable physical properties that can be tuned to suit application requirements. The liquid component—ionic liquids—are effectively involatile, which provides new opportunities to explore gel surfaces with UHV based analytical techniques. Here, we exploit the highly solvating nature of ionic liquids to fabricate poly(ethylene glycol) based ionogels with high concentrations of zinc, and then investigate their surfaces to show that tunability extends beyond the bulk to the interface. A unique relationship between Lewis acidity and basicity and the surface concentration of metal was revealed. Chemical state analysis and molecular dynamics showed that Lewis acidic metals templated polymers to give new architectures reduced brittleness and increased flexibility, while Lewis basic metals improved polymer uniformity and strengthened gels. Therefore, bulk structure, surface composition, and metal speciation were all found to be intimately related and dependent upon the coordination strengths of ionic liquid anions. Importantly, the highly controllable surface and structural properties of metal ionogels allow fine-tuning across a broad design space, which presents new opportunities for gel based applications. |
| Databáze: | OpenAIRE |
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