Water Absorption and Effect of Water Content on Viscosity and Electrical Conductivity of Two Diethylmethylammonium Ionic Liquids

The effect of environmental water on certain properties of ionic liquids (ILs) can be decisive when considering a possible industrial application. The effect of environmental water absorption on electrical conductivity (using a conductimeter Crison Basic 30) and viscosity (using a rheometer AR2000 TA Instruments) on two diethylmethylammonium ionic liquids was analyzed. The studied compounds were based on a cation (diethylmethylammonium) and two anions (methanesulfonate and trifluoromethanesulfonate). In both ionic liquids the water absorption corresponded to a Fickian behavior, agreeing with previous literature data on other ILs, being methanesulfonate much more hygroscopic than trifluoromethanesulfonate (28% and 6% in weight for [EEMAm][MeSO3] and [EEMAm][OTf], respectively). As expected, water considerably increased the ionic conductivity; values were duplicated in the case of [EEMAm][OTf] and quadruplicated for [EEMAm][MeSO3]. Similarly, the viscosity decreased drastically with water incorporation in the IL—showing changes of 88% and 66% for trifluoromethanesulfonate and methanesulfonate, respectively. Furthermore, in the case of diethylmethylammonium trifluoromethanesulfonate, the functional dependence of the viscosity with the molar fraction of water was studied. According to the observed behavior, the viscosity of the pure IL was estimated using the equation proposed by Seddon et al.

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Effect of water content on the corrosiveness of imidazolium-based ionic liquids

Materials and Corrosion ◽

10.1002/maco.201810215 ◽

2018 ◽

Vol 69 (11) ◽

pp. 1658-1668

Author(s):

Seyedreza Noori ◽

Maria Vittoria Diamanti ◽

MariaPia Pedeferri ◽

Andrea Brenna ◽

Marco Ormellese

Keyword(s):

Ionic Liquids ◽

Water Content ◽

Effect Of Water

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Effect of Water Content on the Electrical Conductivity of Sodium Trisilicate Glasses

Journal of the American Ceramic Society ◽

10.1111/j.1151-2916.1990.tb05224.x ◽

1990 ◽

Vol 73 (5) ◽

pp. 1446-1448 ◽

Cited By ~ 3

Author(s):

John M. Jewell ◽

James E. Shelby

Keyword(s):

Electrical Conductivity ◽

Water Content ◽

Effect Of Water

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Effect of water content on physicochemical properties and electrochemical behavior of ionic liquids containing choline chloride, ethylene glycol and hydrated nickel chloride

Journal of Molecular Liquids ◽

10.1016/j.molliq.2015.10.028 ◽

2015 ◽

Vol 212 ◽

pp. 716-722 ◽

Cited By ~ 27

Author(s):

V.S. Protsenko ◽

A.A. Kityk ◽

D.A. Shaiderov ◽

F.I. Danilov

Keyword(s):

Ionic Liquids ◽

Ethylene Glycol ◽

Physicochemical Properties ◽

Water Content ◽

Electrochemical Behavior ◽

Choline Chloride ◽

Nickel Chloride ◽

Effect Of Water

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Electrical Conductivity and Nyquist Plot of C4C1Im BF4 at Room Temperature by Impedance Spectroscopy

Chemistry Proceedings ◽

10.3390/ecsoc-24-08369 ◽

2020 ◽

Vol 3 (1) ◽

pp. 119

Author(s):

Pablo Vallet ◽

Juan José Parajó ◽

Félix Sotuela ◽

Angel Morcillo ◽

María Villanueva ◽

...

Keyword(s):

Thermal Stability ◽

Electrical Conductivity ◽

Ionic Liquids ◽

Ionic Conductivity ◽

Impedance Spectroscopy ◽

Vapour Pressure ◽

Room Temperature ◽

Nyquist Plot ◽

High Thermal Stability ◽

Wide Potential

Ionic liquids (ILs) represent a real alternative for electrochemical applications due to their remarkable characteristics, namely a very low vapour pressure, low flammability, high thermal stability, wide potential window and high ionic conductivity. In this work, Nyquist plot and impedance spectroscopy at room temperature is proposed as an alternative method to obtain the ionic conductivity for ionic liquids by using an Agilent HP 4284A RLC precision meter. For this propose, the IL 1-butyl-3-methylimidazolium tetrafluoroborate (C4C1Im BF4) was selected and results were compared with the previously obtained from the conductimeter CRISON GLP31.

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The influence of frozen storage conditions on selected quality parameters of poultry and pork

AUTOBUSY – Technika Eksploatacja Systemy Transportowe ◽

10.24136/atest.2018.241 ◽

2018 ◽

Vol 19 (6) ◽

pp. 1137-1140

Author(s):

Krzysztof Tereszkiewicz ◽

Magdalena Pigoń ◽

Piotr Molenda ◽

Karolina Choroszy

Keyword(s):

Electrical Conductivity ◽

Water Absorption ◽

Water Content ◽

Ph Value ◽

Frozen Storage ◽

Storage Conditions ◽

Quality Parameters ◽

Chemical Parameters ◽

Physico Chemical

The paper presents results of studies concerning the influence of frozen storage conditions on selected quality parameters of poultry and pork. The following physico-chemical parameters were analysed: water content, pH value, lightness of colour, electrical conductivity and water absorption. It was observed that during the analysed period of frozen storage similar changes of the examined quality parameters occurred in both types of meat, yet with a different intensity. In poultry, higher losses of water were observed, as well as a significant increase in light-ness of colour and in the index of water absorption. In pork, changes in pH value and electrical conductivity were the most visible.

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Increasing the Electrical Conductivity of Layered Double Hydroxides by Intercalation of Ionic Liquids

Materials Science Forum ◽

10.4028/www.scientific.net/msf.941.2209 ◽

2018 ◽

Vol 941 ◽

pp. 2209-2213

Author(s):

Erica Ciotta ◽

Roberto Pizzoferrato ◽

Maria Luisa Di Vona ◽

Ivan Vito Ferrari ◽

Maria Richetta ◽

...

Keyword(s):

Electrical Conductivity ◽

Ionic Liquids ◽

Ionic Conductivity ◽

Layered Double Hydroxides ◽

Lithium Ion ◽

Composite Membranes ◽

Precipitation Method ◽

Anionic Clays ◽

Co Precipitation ◽

Double Hydroxides

Layered double hydroxides (LDHs) are anionic clays composed by host layers of positively charged metal hydroxide, in which anions are intercalated to neutralize the charge of the positive layers. Because of the positive charge of the structure and because of their properties of anion exchanges, diﬀerent anions can be intercalated into the structure. In recent years the ionic conductivity of LDHs was studied for use as the anode material in lithium-ion batteries or PVA/LDH hybrid membranes for fuel cells. However, such studies have reported very low values of the electrical conductivity that is less than 10-3 S cm-1 near room temperature. However, the ion conductivities of LDHs depends on the intercalated anion species and may be aﬀected by diﬀerence in the synthesis condition. Moreover, the anion conductivity increases with increasing interlayer distance and as more water is adsorbed by LDH. Within this framework, we have intercalated two ionic liquids, tetramethylammonium hydroxide (TMAH) and 1-buthyl-3-methylimidazolium hydrogen sulfate (Bmim-HSO4) in the interlamellar space with the purpose of increasing the ionic conductivity and decreasing the dependence from the water content. LDH was prepared using the co-precipitation method with controlled pH. The introduction of IL was performed by the intercalation methods. The increase of conductivity was around an order of magnitude in the case of Bmim-HSO4. The LDH-IL can be an interesting material to prepare composite membranes for electrochemical applications.

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