In situ FTIR investigation of the solubility and swelling of model epoxides in supercritical CO2

Foltran, Stéphanie; Cloutet, Éric; Cramail, Henri; Tassaing, Thierry

doi:10.1016/j.supflu.2011.12.015

Cited by 36 publications

(27 citation statements)

References 30 publications

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“…Finally, taking into account all the source of errors associated with our methodology (baseline correction, constant molar extinction coefficient, spectrometer stability), a maximum relative error of about ±5% in the concentration values has been estimated. We emphasize that the reliability of such methodology has already been demonstrated in previous investigations on the mutual solubility of epoxide with CO 2 [19] and water with CO 2 [23] where a satisfactory agreement with literature data was shown.…”

Section: Data Processing For the Determination Of Mutual Solubility Asupporting

confidence: 74%

“…This method has been previously successfully applied in phase equilibrium studies for the determination of the CO 2 sorption and swelling in liquids [18,19] and in polymers [20,21]. In particular, we would like to stress that molar absorption coefficients of CHstretching vibrational modes and combination bands are expected to exhibit little sensitivity upon temperature and pressure conditions [20,22,23].…”

Section: Introductionmentioning

confidence: 99%

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Phase equilibrium of the CO2/glycerol system: Experimental data by in situ FT-IR spectroscopy and thermodynamic modeling

Medina-González

Tassaing

Camy

et al. 2013

The Journal of Supercritical Fluids

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao. a b s t r a c tPhase equilibrium experimental data for the CO 2 /glycerol system are reported in this paper. The measurements were performed using an in situ FT-IR method for temperatures ranging from 40 • C to 200 • C and pressures up to 35.0 MPa, allowing determination of the mutual solubility of both compounds. Concerning the CO 2 rich phase, it was observed that the glycerol solubility in CO 2 was extremely low (in the range of 10 −5 in mole fraction) in the pressure and temperature domains investigated here. Conversely, the glycerol rich phase dissolved CO 2 at mole fractions up to 0.13. Negligible swelling of the glycerol rich phase has been observed. Modeling of the phase equilibrium has been performed using the Peng-Robinson equation of state (PR EoS) with classical van der Waals one fluid and EoS/G E based mixing rules (PSRK and MHV2). Satisfactory agreement was observed between modeling results and experimental measurements when PSRK mixing rules are used in combination with UNIQUAC model, although UNIFAC predictive approach gives unsatisfactory representation of experimental behavior.

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Section: Data Processing For the Determination Of Mutual Solubility Asupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Phase equilibrium of the CO2/glycerol system: Experimental data by in situ FT-IR spectroscopy and thermodynamic modeling

Medina-González

Tassaing

Camy

et al. 2013

The Journal of Supercritical Fluids

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“…57 Moreover, knowing that TBABr (and the HBD) is soluble in this phase and insoluble in the gaseous CO 2 rich phase, the epoxide/CO 2 coupling only takes place in the epoxide rich phase. The organocatalysed synthesis of propylene carbonate (PC) by coupling of PO with CO 2 in the presence of 3 mol% of TBABr at 60°C and 2 MPa was monitored by in situ FTIR spectroscopy.…”

Section: Resultsmentioning

confidence: 99%

Organocatalytic promoted coupling of carbon dioxide with epoxides: a rational investigation of the cocatalytic activity of various hydrogen bond donors

Alvès

Grignard

Gennen

et al. 2015

Catal. Sci. Technol.

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A catalytic platform based on an onium salt used in combination with organic cocatalysts of various structures was developed for the efficient CO 2 /epoxide coupling under mild conditions. Through detailed kinetic studies by in situ FT-IR spectroscopy, a rational investigation of the efficiency of a series of commercially available hydrogen bond donors co-catalysts was realized and the influence of different parameters such as the pressure, the temperature, the catalyst loading, and the nature of the epoxide on the reaction kinetics was evaluated. Fluorinated alcohols were found to be more efficient than other hydrogen bond donor activators proposed previously in the literature under similar conditions. Catal. Sci. Technol. This journal is

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“…Solubility behavior of oxirane functional molecules under tuned conditions of pressure, density, and temperature in SCC has been well documented but has not been reported in the context of dispersing carbon nanomaterials in SCC [34]. In the present investigation, the dispersion behavior of different concentrations (phr) of MWCNTs ranging from 0.1 to 0.3 into epoxy resin (0.1 /dL mole) has been investigated under the pressure of SCC ranging from 1200 to 1800, at 90°C, and 1500 rpm over 1 h. All the processes involved in dispersion of MWCNTs into epoxy http://carbonlett.org tions, a slight increase in the tendency of agglomeration of MWCNTs in the epoxy matrix was observed due to their entanglement in the matrix (Fig.…”

Section: Resultsmentioning

confidence: 99%

Modifications of mechanical, thermal, and electrical characteristics of epoxy through dispersion of multi-walled carbon nanotubes in supercritical carbon dioxide

Zaidi¹,

Joshi²,

Kumar³

et al. 2013

Carbon letters

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A supercritical carbon dioxide (SCC) process of dispersion of multi-walled carbon nanotubes (MWCNTs) into epoxy resin has been developed to achieve MWCNT/epoxy composites (CECs) with improved mechanical, thermal, and electrical properties. The synthesis of CECs has been executed at a MWCNT (phr) concentration ranging from 0.1 to 0.3 into epoxy resin (0.1 mol) at 1800 psi, 90°C, and 1500 rpm over 1 h followed by curing of the MWCNT/epoxy formulations with triethylene tetramine (15 phr). The effect of SCC treatment on the qualitative dispersion of MWCNTs at various concentrations into the epoxy has been investigated through spectra analyses and microscopy. The developed SCC assisted process provides a good dispersion of MWCNTs into the epoxy up to a MWCNT concentration of 0.2. The effects of SCC assisted dispersion at various concentrations of MWCNTs on modification of mechanical, thermal, dynamic mechanical thermal, and tribological properties and the electrical conductivity of CECs have been investigated.

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In situ FTIR investigation of the solubility and swelling of model epoxides in supercritical CO2

Cited by 36 publications

References 30 publications

Phase equilibrium of the CO2/glycerol system: Experimental data by in situ FT-IR spectroscopy and thermodynamic modeling

Phase equilibrium of the CO2/glycerol system: Experimental data by in situ FT-IR spectroscopy and thermodynamic modeling

Organocatalytic promoted coupling of carbon dioxide with epoxides: a rational investigation of the cocatalytic activity of various hydrogen bond donors

Modifications of mechanical, thermal, and electrical characteristics of epoxy through dispersion of multi-walled carbon nanotubes in supercritical carbon dioxide

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