Heat capacity of 1-hexadecyl-3-methylimidazolium based ionic liquids in solid and liquid phase

0524605 - ÚCHP 2021 RIV NL eng J - Journal Article
Bendová, Magdalena - Wagner, Zdeněk - Bogdanov, M.G. - Čanji, Maja - Zdolšek, N.
Heat capacity of 1-hexadecyl-3-methylimidazolium based ionic liquids in solid and liquid phase.
Journal of Molecular Liquids. Roč. 305, MAY 1 (2020), č. článku 112847. ISSN 0167-7322. E-ISSN 1873-3166
R&D Projects: GA ČR(CZ) GA17-08218S
Institutional support: RVO:67985858
Keywords : ionic liquids * thermodynamic properties * heat capacity
OECD category: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impact factor: 6.165, year: 2020
Method of publishing: Limited access

In this work, two ionic liquids with a 1-hexadecyl-3-methylimidazolium cation were synthesized with differentanions. Chloride and saccharinate, respectively, both of them showing melting points above room temperature,ranging between (324.15 and 338.15) K and enthalpies of fusion close to or higher than 100 J/g, making them po-tentially suitable phase-change materials (PCMs) for latent heat storage. This application potential can be en-hanced by a suitably large heat capacity and thermal conductivity of the material both in the liquid and solidphase. Heat capacity was therefore measured in this work as a function of temperature using the differentialscanning calorimetry (DSC) to determine how it is affected by the anion structure. Care has been taken to eval-uate the influence of the phase change on the measured data. The experimental data have then been analyzed bymeans of methods based on mathematicalgnostics (MG). As a non-statistical approach towards data uncertainty,MG enabled us to analyze the underlying phenomena that affect the value of the experimental heat capacity.
Permanent Link: http://hdl.handle.net/11104/0308945