Phase Transitions in Higher-melting Imidazolium-based Ionic Liquids: Experiments and Advanced Data Analysis.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F19%3A00507799" target="_blank" >RIV/67985858:_____/19:00507799 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22340/19:43917848

Result on the web

<a href="http://hdl.handle.net/11104/0300801" target="_blank" >http://hdl.handle.net/11104/0300801</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.molliq.2019.111222" target="_blank" >10.1016/j.molliq.2019.111222</a>

Result language

angličtina

Original language name

Phase Transitions in Higher-melting Imidazolium-based Ionic Liquids: Experiments and Advanced Data Analysis.

Original language description

As thermal energy storage becomes an increasingly important topic, good knowledge of properties of phase-change materials (PCM) is essential. Among other properties, a good PCM should show a large enthalpy of melting, reproducible melting/solidification cycles, and long-term thermal stability. Temperatures and enthalpies of fusion should be determined at a possibly large range of conditions to allow for a critical evaluation of the experimental data and assessment of the material application potential. In this work, imidazolium-based ionic liquids (ILs) with long alkyl chain substituents 1-hexadecyl-3-methylimidazolium chloride and 1-hexadecyl-3-methyl-imidazolium saccharinate were studied in view of their possible use as phase-change materials. Differential scanning calorimetry (DSC) and the heat-leak modulus (HLM) methods were used to determine the temperatures and the enthalpies of phase transitions in the studied ILs, enabling us to study the influence of the heating and cooling rates on the measured properties. Enthalpies of fusion near to or larger than 100 J·g−1 were found in the studied ionic liquids, making them promising candidates for thermal energy storage. Peaks corresponding to possible liquid crystalline phases in the DSC traces of 1-hexadecyl-3-methylimidazolium saccharinate were observed, pointing to more complex phase behaviour of the studied ionic liquids. Finally, to critically evaluate the experimental data measured in this work, methods based on mathematical gnostics were used. Repeatability of measurements and the degree of mutual agreement between the methods used in this work could thus be determined.nn

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10403 - Physical chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Molecular Liquids

ISSN

0167-7322

e-ISSN

—

Volume of the periodical

292

Issue of the periodical within the volume

OCT 15

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

111222

UT code for WoS article

000488658900011

EID of the result in the Scopus database

2-s2.0-85069704013