Benchmark Values: Thermochemistry of the Ionic Liquid [C4Py][Cl]

2012 ◽  
Vol 65 (11) ◽  
pp. 1487 ◽  
Author(s):  
Sergey P. Verevkin ◽  
Dzmitry H. Zaitsau ◽  
Vladimir N. Emel'yanenko ◽  
Ricardas V. Ralys ◽  
Christoph Schick ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Md Simulations ◽  
Enthalpy Of Vaporization ◽  
Gravimetric Analysis ◽  
Butyl Chloride ◽  
Reaction Enthalpy ◽  
Scanning Calorimetry ◽  
Indirect Technique ◽  
Isothermal Mass

Differential scanning calorimetry (DSC) was used for the determination of the reaction enthalpy of the synthesis of the ionic liquid [C4Py][Cl] from pyridine and butyl chloride. A combination of DSC results with quantum chemical calculations presents an indirect technique to obtain enthalpy of vaporization of [C4Py][Cl]. In order to ascertain this indirect value, we used thermal gravimetric analysis (TGA) to derive enthalpy of vaporization directly from the isothermal mass-loss measurements. This new procedure was additionally validated with molecular dynamics (MD) simulations.

Preparation of Two Novel Ionic Electroconductive Polyurethanes Functionalized with the Backbone of Ionic Liquid

2013 ◽  
Vol 668 ◽  
pp. 259-262
Author(s):  
Ding Jun Zhang ◽  
Chao Yun Qu ◽  
Yu Xian Chen
Keyword(s):  
Electrical Conductivity ◽  
Differential Scanning Calorimetry ◽  
Ionic Liquid ◽  
Surface Resistance ◽  
High Yield ◽  
Gravimetric Analysis ◽  
Thermal Gravimetric ◽  
Facile Synthesis ◽  
Scanning Calorimetry ◽  
Structures And Properties

The facile synthesis of two new Ionic electroconductive polyurethanes with the framework of ionic liquids, i.e., PUR-T: synthesized with isocyanate TDI; PUR-H: synthesized with isocyanate HDL, are described. Their structures and properties were characterized by Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), Differential scanning calorimetry (DSC) and the surface resistance meter. The effects of the different kinds of isocyanate on electrical conductivity of PUR were also investigated. It was found that their electrical conductivity can be optimized by changing the reaction temperature. The PUR-H, which exhibits an electrical conductivity of 1.0×104 Ω surface resistance, could be obtained in high yield, up to 65% at 90 oC for 12h.

scholarly journals The Impact of Composition and Morphology on Ionic Conductivity of Silk/Cellulose Bio-Composites Fabricated from Ionic Liquid and Varying Percentages of Coagulation Agents

2020 ◽  
Vol 21 (13) ◽  
pp. 4695 ◽  
Author(s):  
Bailey Blessing ◽  
Cory Trout ◽  
Abneris Morales ◽  
Karleena Rybacki ◽  
Stacy A. Love ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Conductivity ◽  
Ionic Conduction ◽  
Hydrophobic Interactions ◽  
Gravimetric Analysis ◽  
Dielectric Relaxation Spectroscopy ◽  
Scanning Calorimetry ◽  
Electrolyte Membranes ◽  
Bombyx Mori Silk ◽  
The Impact

Blended biocomposites created from the electrostatic and hydrophobic interactions between polysaccharides and structural proteins exhibit useful and unique properties. However, engineering these biopolymers into applicable forms is challenging due to the coupling of the material’s physicochemical properties to its morphology, and the undertaking that comes with controlling this. In this particular study, numerous properties of the Bombyx mori silk and microcrystalline cellulose biocomposites blended using ionic liquid and regenerated with various coagulation agents were investigated. Specifically, the relationship between the composition of polysaccharide-protein bio-electrolyte membranes and the resulting morphology and ionic conductivity is explored using numerous characterization techniques, including scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray scattering, atomic force microscopy (AFM) based nanoindentation, and dielectric relaxation spectroscopy (DRS). The results revealed that when silk is the dominating component in the biocomposite, the ionic conductivity is higher, which also correlates with higher β-sheet content. However, when cellulose becomes the dominating component in the biocomposite, this relationship is not observed; instead, cellulose semicrystallinity and mechanical properties dominate the ionic conduction.

Experimental Investigating the Impact of Ionic Liquid on PET’s Properties

2018 ◽  
Author(s):  
Waleed K. Ahmed
Keyword(s):  
Ionic Liquid ◽  
Thermo Gravimetric Analysis ◽  
Melt Flow Index ◽  
Nanoindentation Test ◽  
Flow Index ◽  
Gravimetric Analysis ◽  
Scanning Calorimetry ◽  
Weight Percentage ◽  
Mixing Ratios ◽  
The Impact

This study presents an experimental laboratory investigation done on the Polyethylene terephthalate – PET that is used for food grade (water bottle) by mixing with ionic liquid. Both thermal and mechanical properties with a varying weight percentage of ionic liquid are investigated. Mainly, at different mixing ratios of PET-Ionic liquid of (2, 3, 5, 7 and 10%), impact of the ionic liquid on the characteristics of the PET are examined through MFI (melt flow index), differential scanning calorimetry (DSC), thermo-gravimetric analysis (TGA), nanoindentation methods as well as Fourier Transform Infrared (FTIR) spectroscopy. In general, the estimated results indicated that the stiffness as well as the hardness acquired from nanoindentation test for the PET blends, decrease as long as the concentration increases.

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