Thermal Kinetics of Monocationic and Dicationic Pyrrolidinium-Based Ionic Liquids

This work presents an in-depth kinetic thermal degradation comparison between traditional monocationic and the newly developed dicationic ionic liquid (IL), both coupled with a bromide (Br ) anion by using non-isothermal thermogravimetric analysis. Thermal analyses of 1-butyl-1-methylpyrrolidinium b...

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Bibliographic Details
Published in:Materials 2022-02, Vol.15 (3), p.1247
Main Authors: Ab Rahim, Asyraf Hanim, Abd Ghani, Noraini, Hasanudin, Noorhafizah, Yunus, Normawati M, Azman, Ninna Sakina
Format: Article
Language:English
Subjects:
Chloride
Communication
Ionic liquids
Methods
NMR
Nuclear magnetic resonance
Thermal degradation
Thermal stability
Thermogravimetric analysis
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Summary:This work presents an in-depth kinetic thermal degradation comparison between traditional monocationic and the newly developed dicationic ionic liquid (IL), both coupled with a bromide (Br ) anion by using non-isothermal thermogravimetric analysis. Thermal analyses of 1-butyl-1-methylpyrrolidinium bromide [C MPyr][Br] and 1,4-bis(1-methylpyrrolidinium-1-yl)butane dibromide [BisC MPyr][Br ] were conducted at a temperature range of 50-650 °C and subjected to various heating rates, which are 5, 10, 15, 20 and 25 °C/min. Thermogravimetric analysis revealed that dicationic IL, [BisC MPyr][Br ] is less thermally stable compared to monocationic [C MPyr][Br]. A detailed analysis of kinetic parameters, which are the activation energy ( ) and pre-exponential factor ( ), was calculated by using Kissinger-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (FWO) and Starink. This study revealed that the average and of [BisC MPyr][Br ] are lower than [C MPyr][Br], which may be contributed to by its low thermal stability. Conclusively, it proved that the and of ILs are strongly related to the thermal stability of ILs.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15031247