Enhancing the Thermal Stability of Ionogels: Synthesis and Properties of Triple Ionic Liquid/Halloysite/MCC Ionogels
| Autor: | Andrew V. Noskov, Olga V. Alekseeva, Alexander V. Agafonov, Valeriya D. Shibaeva, Vladimir Ivanov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Conductometry Intercalation (chemistry) Pharmaceutical Science engineering.material Halloysite Article thermal stability Analytical Chemistry chemistry.chemical_compound QD241-441 Drug Discovery Thermal stability Physical and Theoretical Chemistry halloysite ionic liquid chemistry.chemical_classification Organic Chemistry Polymer Microcrystalline cellulose chemistry Chemical engineering Chemistry (miscellaneous) Ionic liquid engineering glass-transition temperature Molecular Medicine conductivity Glass transition microcrystalline cellulose |
| Zdroj: | Molecules Volume 26 Issue 20 Molecules, Vol 26, Iss 6198, p 6198 (2021) |
| ISSN: | 1420-3049 |
| DOI: | 10.3390/molecules26206198 |
| Popis: | In this study, an ionic liquid (IL), 1-butyl-3-methylimidazolium acetate, was used to prepare ionogels with microcrystalline cellulose (MCC) and halloysite (Hal). SEM, XRD, TG, DSC, FTIR spectroscopy, conductometry and mechanical tests were used to study the morphology, structure, thermal behaviour and electrophysical and mechanical characteristics of synthesised ionogels. XRD analysis showed a slight decrease in the interlayer space of halloysite in ionogels containing MCC, which may have been associated with the removal of residual water molecules resulting from hydrophilic IL anions and polymer macromolecules. A change in conductivity and glass-transition temperature of the ionic liquid was revealed due to intercalation into halloysite (a confinement effect) and modification with cellulose. For triple IL/Hal/MCC ionogels, the characteristic thermal degradation temperatures were higher than the corresponding values for IL/Hal composites. This indicates that the synthesised IL/Hal/MCC ionogels are characterised by a greater thermal stability than those of IL/Hal systems. |
| Databáze: | OpenAIRE |
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