Thermal Properties of Lauric- and Stearic Acid Intercalated Layered Double Hydroxides
| Autor: | Sabine M. C. Verryn, Nontete S. Nhlapo, Walter Wilhelm Focke, Lumbidzani Moyo |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
chemistry.chemical_classification
Materials science Intercalation (chemistry) Inorganic chemistry Layered double hydroxides Infrared spectroscopy General Chemistry engineering.material Condensed Matter Physics chemistry.chemical_compound chemistry engineering Hydroxide General Materials Science Stearic acid Sodium dodecyl sulfate Thermal analysis Alkyl |
| Zdroj: | Molecular Crystals and Liquid Crystals. 521:168-178 |
| ISSN: | 1563-5287 1542-1406 |
| DOI: | 10.1080/15421401003720116 |
| Popis: | A commercial layered double hydroxide (LDH) with nominal composition was intercalated with lauric and stearic acid using a surfactant-assisted method. X-ray diffraction, thermal analysis and infrared spectroscopy confirmed that bilayer-intercalated compounds were formed and that the surfactant (sodium dodecyl sulfate) was not co-intercalated. These compounds shows interesting thermal behavior with two phase transformations observed at elevated temperatures. At temperatures that are significantly higher than the melting points of the corresponding free acids, the alkyl chains assume a disordered liquid-like state within the clay galleries. However, at even higher temperatures the materials become completely amorphous like true melts. |
| Databáze: | OpenAIRE |
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