Surface characterization of 1-butyl-1-ethylpiperidinium bromide by inverse gas chromatography

Papadopoulou, Stella K.; Papaïconomou, Nicolas; Baup, Stéphane; Iojoiu, Cristina; Švecová, Lenka; Thivel, Pierre-Xavier

doi:10.1016/j.molliq.2019.110945

Cited by 9 publications

(4 citation statements)

References 68 publications

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“…A related approach to calculate

γ_{S}^{D}

is by Dorris and Gray method, 26 where

γ_{S}^{D}

is calculated from the following equation:

- ∆ G_{[{CH}_{2}]} = 2 N_{A} a_{[{CH}_{2}]} {(γ_{S}^{D} γ_{([], {CH}_{2})}^{D})}^{1 / 2},

where

a_{[{CH}_{2}]}

is the molecular area of a methylene (CH 2 ) group,

γ_{[C {normalH}_{2}]}^{D}

is the surface energy of a solid completely composed of CH 2 groups, that is of a surface constituted of close packed CH 2 groups analogous to polyethylene and given by

γ_{[C {normalH}_{2}]}^{D} = 35.6 + 0.058 ((), 273.2 - T)

, and

{∆ G}_{[{CH}_{2}]}

was obtained from the slope of the plot ∆G A versus carbon atom numbers of the used n‐alkanes 27,28 …”

Section: Inverse Gas Chromatography Theorymentioning

confidence: 99%

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Synthesis and thermodynamic characterization of poly(methyl methacrylate)/multiwall carbon nanotube nanocomposite

Çakar

2020

Surface & Interface Analysis

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In the first part of this study, poly(methyl methacrylate) (PMMA)/multiwall carbon nanotube (MWCNT) nanocomposite was synthesized by adding carbon nanotube before polymerization with bulk polymerization. Surface morphology of the PMMA/MWCNT nanocomposite and the PMMA/MWCNT nanocomposite with Chromosorb W was characterized by scanning electron microscopy (SEM). Surface and thermodynamic properties of the PMMA/MWCNT nanocomposite were investigated by inverse gas chromatography (IGC). The surface acid base character and dispersed surface energy γSD of the PMMA/MWCNT were determined at infinite dilution. The entropy of adsorption, ∆SS, the specific free energy of adsorption, ∆GS, and the enthalpy of adsorption, ∆HS, of selected polar solvents were determined on the PMMA/MWCNT nanocomposite. The values of ∆HS were correlated with both the acceptor and donor numbers of the solvents to determine the Lewis acidic constant KA and the Lewis basic constant KD of the PMMA/MWCNT nanocomposite. The PMMA/MWCNT nanocomposite selectivity was investigated using the acetate and alcohol isomers by IGC at temperatures between 393.2 and 403.2 K. Glass transition temperature (Tg) was determined using differential scanning calorimetry (DSC) and IGC method. The interactions between the PMMA/MWCNT nanocomposite and 12 solvents were propped at a temperature range (423.2–448.2 K). The Flory–Huggins interaction parameter, χ12∞, and the weight fraction activity coefficient, 0.25emΩ1∞, of the PMMA/MWCNT nanocomposite solvent system were estimated at temperatures between 423.2 and 448.2 K. The solubility parameter of the PMMA/MWCNT nanocomposite, δ2, was calculated as 14.0 (cal/cm3)1/2.

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“…A related approach to calculate

γ_{S}^{D}

is by Dorris and Gray method, 26 where

γ_{S}^{D}

is calculated from the following equation:

- ∆ G_{[{CH}_{2}]} = 2 N_{A} a_{[{CH}_{2}]} {(γ_{S}^{D} γ_{([], {CH}_{2})}^{D})}^{1 / 2},

where

a_{[{CH}_{2}]}

is the molecular area of a methylene (CH 2 ) group,

γ_{[C {normalH}_{2}]}^{D}

is the surface energy of a solid completely composed of CH 2 groups, that is of a surface constituted of close packed CH 2 groups analogous to polyethylene and given by

γ_{[C {normalH}_{2}]}^{D} = 35.6 + 0.058 ((), 273.2 - T)

, and

{∆ G}_{[{CH}_{2}]}

was obtained from the slope of the plot ∆G A versus carbon atom numbers of the used n‐alkanes 27,28 …”

Section: Inverse Gas Chromatography Theorymentioning

confidence: 99%

“…was obtained from the slope of the plot ΔG A versus carbon atom numbers of the used n-alkanes. 27,28 By plotting RTln(V N ) as a function of a Á…”

Section: Theoretical Background Of Surface Characterizationmentioning

confidence: 99%

Synthesis and thermodynamic characterization of poly(methyl methacrylate)/multiwall carbon nanotube nanocomposite

Çakar

2020

Surface & Interface Analysis

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“…Ionic liquids (ILs) are pure salts composed of organic cations and organic or inorganic anions . The physical and chemical properties of ionic liquids, such as low vapor pressure, high thermal stability and low combustibility, environment-friendly, and unique solvating properties for many polar and nonpolar compounds . One of the alluring aspects of ionic liquids is its tunability by choosing different anions and cations .…”

Section: Introductionmentioning

confidence: 99%

“…1 The physical and chemical properties of ionic liquids, such as low vapor pressure, high thermal stability and low combustibility, environment-friendly, and unique solvating properties for many polar and nonpolar compounds. 2 One of the alluring aspects of ionic liquids is its tunability by choosing different anions and cations. 3 Based on these advantages, ILs has been widely explored as 'green' media in chemical and catalytic reactions, 4 distillations, 5 liquid−liquid extractions, 6 and gas separation processes; as gas storage media, 7 electrolytes in batteries, 8 electrochemical capacitors, and as catalysts.…”

Section: Introductionmentioning

confidence: 99%

Inverse Gas Chromatography: Effects of the Experimental Temperature and Molecular Structure on the Solubility Parameters of 1-Alkyl-3-methylimidazolium Hydrogen Sulfate ([C_nMIM][HSO₄], n = 4, 6, and 8)

Wang

2020

J. Chem. Eng. Data

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Thermodynamic parameters at infinite dilution for thirty-one organic solutes in a series of imidazolyl hydrogen sulfate ionic liquids (ILs) were determined by inverse gas chromatography (IGC). The IGC characterization was carried out at temperatures ranging between 303.15 and 343.15 K for determining the Hildebrand solubility parameter (δ 2 ) as well as the Flory−Huggins interaction parameter (χ 12 ∞ ), the activity coefficient at infinite dilution (γ 12 ∞ ), and the thermodynamic functions. In addition, based on the γ 12 ∞ results, the selectivity and capacity were directly calculated for two separation problems (hexane/benzene and hexane/thiophene). Under the different effects of the three ILs, it was found that the values of χ 12 ∞ and γ 12 ∞ were significantly different for the solutes tested, but all the values follow a certain pattern: they increase with temperature or decrease with temperature. As the temperature increased, the solubility parameters of the three ILs showed a linear decrease trend. The solubility parameters of the three ionic liquids at room temperature were obtained by extrapolation as δ 2([BMIM][HSO4]) = 24.15 MPa 1/2 , δ 2([HMIM][HSO4]) = 24.10 MPa 1/2 , and δ 2([OMIM][HSO4]) = 23.66 MPa 1/2 .

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Comparative physicochemical characterization of ULTEM/SWCNT nanocomposites: Surface, thermal and electrical conductivity analyses

et al. 2022

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Surface characterization of 1-butyl-1-ethylpiperidinium bromide by inverse gas chromatography

Cited by 9 publications

References 68 publications

Synthesis and thermodynamic characterization of poly(methyl methacrylate)/multiwall carbon nanotube nanocomposite

Synthesis and thermodynamic characterization of poly(methyl methacrylate)/multiwall carbon nanotube nanocomposite

Inverse Gas Chromatography: Effects of the Experimental Temperature and Molecular Structure on the Solubility Parameters of 1-Alkyl-3-methylimidazolium Hydrogen Sulfate ([C_nMIM][HSO₄], n = 4, 6, and 8)

Comparative physicochemical characterization of ULTEM/SWCNT nanocomposites: Surface, thermal and electrical conductivity analyses

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Surface characterization of 1-butyl-1-ethylpiperidinium bromide by inverse gas chromatography

Cited by 9 publications

References 68 publications

Synthesis and thermodynamic characterization of poly(methyl methacrylate)/multiwall carbon nanotube nanocomposite

Synthesis and thermodynamic characterization of poly(methyl methacrylate)/multiwall carbon nanotube nanocomposite

Inverse Gas Chromatography: Effects of the Experimental Temperature and Molecular Structure on the Solubility Parameters of 1-Alkyl-3-methylimidazolium Hydrogen Sulfate ([CnMIM][HSO4], n = 4, 6, and 8)

Comparative physicochemical characterization of ULTEM/SWCNT nanocomposites: Surface, thermal and electrical conductivity analyses

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Product

Resources

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Inverse Gas Chromatography: Effects of the Experimental Temperature and Molecular Structure on the Solubility Parameters of 1-Alkyl-3-methylimidazolium Hydrogen Sulfate ([C_nMIM][HSO₄], n = 4, 6, and 8)