scholarly journals Comparing the Thermal and Electrochemical Stabilities of Two Structurally Similar Ionic Liquids

Molecules ◽  
2020 ◽  
Vol 25 (10) ◽  
pp. 2388 ◽  
Author(s):  
Faiz Ullah Shah ◽  
Inayat Ali Khan ◽  
Patrik Johansson
Keyword(s):  
Ionic Liquids ◽  
Variable Temperature ◽  
Thermo Gravimetric Analysis ◽  
Analysis Data ◽  
Nitrogen Atmosphere ◽  
Gravimetric Analysis ◽  
Electrochemical Studies ◽  
Thermo Gravimetric ◽  
Electrochemical Stabilities ◽  
Operation Temperature

Here we focus on the thermal and variable temperature electrochemical stabilities of two ionic liquids (ILs) having a common tributyloctyl phosphonium cation [P4,4,4,8]+ and two different orthoborate anions: bis(mandelato)borate [BMB]− and bis(salicylato)borate [BScB]−. The thermo-gravimetric analysis data suggest that [P4,4,4,8][BScB] is thermally more stable than [P4,4,4,8][BMB] in both nitrogen atmosphere and air, while the impedance spectroscopy reveals that [P4,4,4,8][BScB] has higher ionic conductivity than [P4,4,4,8][BMB] over the whole studied temperature range. In contrast, the electrochemical studies confirm that [P4,4,4,8][BMB] is more stable and exhibits a wider electrochemical stability window (ESW) on a glassy carbon electrode surface as compared to [P4,4,4,8][BScB]. A continuous decrease in the ESWs of both ILs is observed as a function of operation temperature.

Activation Energy of Decomposition of Y2bacuo5 Compound in Wet Co2 at Elevated Temperatures

1989 ◽  
Vol 169 ◽  
Author(s):  
John J. Simmins ◽  
Michael J. Hanagan ◽  
Gary S. Fischman ◽  
Robert L. Snyder
Keyword(s):  
Activation Energy ◽  
Elevated Temperatures ◽  
Barium Carbonate ◽  
Thermo Gravimetric Analysis ◽  
Time Derivative ◽  
Simultaneous Thermal Analysis ◽  
Analysis Data ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Thermo Gravimetric

AbstractDecomposition of the Y2BaCuO5 in C02 was studied using simultaneous thermal analysis (STA) and X-ray diffraction (XRD). The time derivative to the thermo-gravimetric analysis data (DTG) was used to calculate the activation energy. The activation energy of decomposition by CO2 into barium carbonate, copper oxide and yttrium oxide was found to be <

scholarly journals Physio-Chemical and Thermo-Gravimetric Analysis of Prosopis Juliflora and Fibre-Reinforced Plastic for Gasification Process

2019 ◽  
Vol 8 (2) ◽  
pp. 4232-4238
Keyword(s):  
Gas Flow ◽  
Thermo Gravimetric Analysis ◽  
Chemical Conversion ◽  
Prosopis Juliflora ◽  
Nitrogen Atmosphere ◽  
Gravimetric Analysis ◽  
Waste Biomass ◽  
Heating Rates ◽  
Thermo Gravimetric ◽  
Reinforced Plastic

Significance of developing energy from waste biomass has grown extremely high in recent decades. Prosopis Juliflora (PJ - Organic) is a waste plant which was grown in agricultural landfills and Fibre-reinforced plastic (FRP - Inorganic) is procured from composite industry waste are collected for this work, which is abundant in quantity. Gasification are the adequate method for harvesting energy efficiently from organic and inorganic biomass. The objective of this research was to conclude the proximate and ultimate analysis of Prosopis Juliflora and Fibre-reinforced plastic to study the potential for thermo-chemical conversion process. Thermo-gravimetric analysis were observed at heating rates of 20, 30 and 40 ºC/min in inert (nitrogen) atmosphere with gas flow protection rate of 40 ml/min was analyzed for PJ, FRP and PJ+FRP (50:50). Index Terms:

Coordination Compounds of Some 3d-Transition Metal Ions with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)- thiosemicarbazide

2008 ◽  
Vol 59 (7) ◽  
Author(s):  
Madalina Angelusiu ◽  
Maria Negoiu ◽  
Stefania-Felicia Barbuceanu ◽  
Tudor Rosu
Keyword(s):  
Coordination Compounds ◽  
Magnetic Moments ◽  
Thermo Gravimetric Analysis ◽  
Electronic Spectroscopy ◽  
Transition Metal Ions ◽  
Synthesis And Characterization ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
New Compounds

The paper presents the synthesis and characterization of Cu(II), Co(II), Ni(II), Cd(II), Zn(II) and Hg(II) complexes with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)-thiosemicarbazide. The new compounds were characterized by IR, EPR, electronic spectroscopy, magnetic moments, thermo-gravimetric analysis and elemental analysis.

scholarly journals Development of Nervilia fordii Extract-Loaded Electrospun PVA/PVP Nanocomposite for Antioxidant Packaging

Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1728
Author(s):  
Peng Wen ◽  
Teng-Gen Hu ◽  
Yan Wen ◽  
Ke-Er Li ◽  
Wei-Peng Qiu ◽  
...  
Keyword(s):  
Food Packaging ◽  
Thermo Gravimetric Analysis ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Poly Vinyl Alcohol ◽  
Total Phenolic ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
Phenolic And Flavonoid ◽  
Thermal Stability Of

An ethyl acetate extract from of Nervilia fordii (NFE) with considerable suppression activity on lipid peroxidation (LPO) was first obtained with total phenolic and flavonoid contents and anti-LPO activity (IC50) of 86.67 ± 2.5 mg GAE/g sample, 334.56 ± 4.7 mg RE/g extract and 0.307 mg/mL, respectively. In order to improve its stability and expand its application in antioxidant packaging, the nano-encapsulation of NFE within poly(vinyl alcohol) (PVA) and polyvinyl(pyrrolidone) (PVP) bio-composite film was then successfully developed using electrospinning. SEM analysis revealed that the NFE-loaded fibers exhibited similar morphology to the neat PVA/PVP fibers with a bead-free and smooth morphology. The encapsulation efficiency of NFE was higher than 90% and the encapsulated NFE still retained its antioxidant capacity. Fourier transform infrared spectroscopy (FTIR) and X-ray powder diffraction (XRD) analysis confirmed the successful encapsulation of NFE into fibers and their compatibility, and the thermal stability of which was also improved due to the intermolecular interaction demonstrated by thermo gravimetric analysis (TGA). The ability to preserve the fish oil’s oxidation and extend its shelf-life was also demonstrated, suggesting the obtained PVA/PVP/NFE fiber mat has the potential as a promising antioxidant food packaging material.

The Experimental Study on Combustion Characteristics of Corn Straw and Coal Gangue

2011 ◽  
Vol 135-136 ◽  
pp. 1057-1059
Author(s):  
Heng Tao Zhou ◽  
Yong Wei
Keyword(s):  
Thermo Gravimetric Analysis ◽  
Combustion Characteristics ◽  
Combustion Characteristic ◽  
Gravimetric Analysis ◽  
Characteristic Parameters ◽  
Corn Straw ◽  
Kinetics Analysis ◽  
Thermo Gravimetric ◽  
Ignition Characteristic ◽  
Coal Residue

With a thermo gravimetric analysis apparatus combustion characteristics experiments of coal residue cornstalk and mixtures of them were done at 20 C/min heating rate. Then the combustion characteristic Parameters were obtained by above experiments. The c combustion activation energies were acquired by kinetics analysis. The results show those: the ignition characteristic and synthesis combustion characteristic of coal residue are bad. The ignition characteristic and synthesis combustion characteristic of cornstalk are better. The combustion characteristics of the mixture of coal residue and cornstalk are determined by mixing ratio. The ratio of cornstalk is more and the synthesis combustion characteristic is better.

Grafting of Chitosan: Structural, Thermal and Antimicrobial Properties

2019 ◽  
Vol 41 (2) ◽  
pp. 240-240
Author(s):  
Nevin Cankaya Nevin Cankaya
Keyword(s):  
Antimicrobial Activity ◽  
Graft Copolymers ◽  
Thermo Gravimetric Analysis ◽  
Antimicrobial Properties ◽  
Gravimetric Analysis ◽  
Analysis Method ◽  
Methacryloyl Chloride ◽  
Thermo Gravimetric ◽  
Thermal Stabilities ◽  
Ft Ir

In this study, some new chitosan materials were synthesized by the grafting of chitosan with the monomers such as 1-vinylimidazole (VIM), methacrylamide (MAm) and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS). First of all, chitosan methacrylate was prepared by esterification of primary -OH group with methacryloyl chloride a 25.13% yield by mole. The monomers were grafted into chitosan methacrylate via free radical polymerization using 2,2and#39;-Azobisisobutyronitrile as an initiator in N,N-dimethylformamide. The graft copolymers were characterized by FT-IR spectra and elemental analysis. Thermal stabilities of the graft copolymers were determined by TGA (thermo gravimetric analysis) method. The synthesized chitosan methacrylate and its graft copolymers were tested for their antimicrobial activity against bacteria and yeast.

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