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Long-term thermal stability of fatty acid anion-based ionic liquids.

Ramajo, B., Blanco, D., Rivera, N., Viesca Rodriguez, J.L., Gonzalez, R. and Hernandez Battez, A., 2021. Long-term thermal stability of fatty acid anion-based ionic liquids. Journal of Molecular Liquids, 328 (April), 115492.

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DOI: 10.1016/j.molliq.2021.115492

Abstract

Isothermal and dynamic methodologies were used to study the thermal degradation of 8 novel fatty acid anion-based ionic liquids (FAILs): methyltrioctylammonium hexanoate [N ][C ], methyltrioctylammonium octanoate [N ][C ], tetrahexylammonium octanoate [N ][C ], methyltrioctylammonium laurate [N ][C ], methyltrioctylammonium palmitate [N ][C ], tetrahexylammonium palmitate [N ][C ], methyltrioctylammonium stearate [N ][C ] and methyltrioctylammonium oleate [N ][C ]. The thermal stability of these FAILs is controlled by both the cation and anion and most samples have an onset decomposition temperature (T ) below 200 °C. All the FAILs exhibited lower thermal stability under a nitrogen atmosphere than commercially available ILs tested previously in lubrication studies, particularly when compared to those containing the [NTf ] anion. The [N ][C ] and [N ][C ] showed the highest long-term thermal stability, probably related to their stronger anion-cation electrostatic interaction. This led to a multi-step thermal decomposition mechanism observed in the DTG results. Finally, isoconversional modelling for the [N ][C ] agrees with isothermal results. 8,8,8,1 6:0 8,8,8,1 8:0 6,6,6,6 8:0 8,8,8,1 12:0 8,8,8,1 16:0 6,6,6,6 16:0 8,8,8,1 18:0 8,8,8,1 18:1 onset 2 8,8,8,1 6:0 8,8,8,1 8:0 8,8,8,1 12:0 −

Item Type:Article
ISSN:0167-7322
Uncontrolled Keywords:Fatty acid ionic liquids; Thermogravimetric analysis; Isothermal thermogravimetry; Isoconversional method; Model-free kinetics
Group:Faculty of Science & Technology
ID Code:35524
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:19 May 2021 07:48
Last Modified:15 Aug 2021 08:29

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