Phase transitions in higher-melting ionic liquids: thermal storage materials or liquid crystals?

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F18%3A00523663" target="_blank" >RIV/67985858:_____/18:00523663 - isvavai.cz</a>

Result on the web

<a href="https://www.aidic.it/cet/18/69/007.pdf" target="_blank" >https://www.aidic.it/cet/18/69/007.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3303/CET1869007" target="_blank" >10.3303/CET1869007</a>

Result language

angličtina

Original language name

Phase transitions in higher-melting ionic liquids: thermal storage materials or liquid crystals?

Original language description

To assess the application potential of a material in thermal energy storage, the knowledge of their thermophysical properties is of key importance. Specifically, an efficient material has to show, among others, large enthalpies of phase change and a sufficiently large thermal conductivity. In this work, imidazolium-based ionic liquids (ILs) with long alkyl chain substituents 1-hexadecyl-3-methylimidazolium chloride and 1-hexadecyl-3-methylimidazolium saccharinate were studied in view of their possible use as phase-change materials. Differential scanning calorimetry (DSC) and the heat-leak modulus 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 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. Furthermore, peaks corresponding to possible liquid crystalline phases in the DSC traces of 1-hexadecyl-3-methylimidazolium saccharinate were observed. The measured properties are not only essential characteristics of a thermal storage material, temperatures and enthalpies of melting are necessary in thermodynamic description and modelling of solid-liquid phase behavior and thus in the possible utilization of the material in separation and crystallization processes.

Czech name

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Czech description

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Type

D - Article in proceedings

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

2018

Confidentiality

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

Article name in the collection

CHEMICAL ENGINEERING TRANSACTIONS

ISBN

978-88-95608-66-2

ISSN

2283-9216

e-ISSN

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Number of pages

6

Pages from-to

37-42

Publisher name

AIDIC Servizi S.r.l.

Place of publication

Milano

Event location

Florence

Event date

Sep 16, 2018

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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