The HLM method: a simple way to get the solid–liquid phase diagrams and enthalpies of transition of pure components and mixtures

Quirion, François; Lambert, Daniel; Perron, Gérald

doi:10.1139/v92-348

Cited by 9 publications

(4 citation statements)

References 2 publications

(4 reference statements)

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“…HLM method, used for determination of melting temperature, is based on the Heat‐Leak‐Modulus developed by Quirion et al. and this method allows a simple thermal analysis of materials . The information provided by the HLM method is essentially equivalent to that obtained from differential scanning calorimetry (DSC) measurement.…”

Section: Resultsmentioning

confidence: 99%

“…HLM method, used for determination of melting temperature, is based on the Heat-Leak-Modulus developed by Quirion et al and this method allows a simple thermal analysis of materials. [16] The information provided by the HLM method is essentially equivalent to that obtained from differential scanning calorimetry (DSC) measurement. While being more robust than DSC, it provides a good reproducibility of the measured temperatures of melting and is thus suitable for a quick screening of the phase transitions in the studied materials.…”

Section: Yields Of Carbon Materials and Recovery Of Studied Ionic Liquidmentioning

confidence: 99%

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Electrocatalytic Activity of Ionic‐Liquid‐Derived Porous Carbon Materials for the Oxygen Reduction Reaction

et al. 2018

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Carbon materials, prepared by using different methods with ionic liquids, are compared as electrocatalysts for the oxygen reduction reaction (ORR). Materials were synthesized through the hydrothermal carbonization of glucose and by using the same method in the presence of 1‐butyl‐3‐methylimidazolium methanesulfonate [bmim][MeSO3] as an additive. Another two carbon‐based materials were prepared by using ionic‐liquid‐based methods: ionothermal carbonization of glucose using [bmim][MeSO3] as a recyclable medium for the carbonization reaction and by direct carbonization of the ionic liquid in a one‐step method using [bmim][MeSO3] as the precursor for N‐ and S‐doped porous carbon (Carb‐IL). Characterization results showed the possibility of morphology and porosity control by using [bmim][MeSO3]. All materials were subsequently tested for the ORR in alkaline media. Carb‐IL showed enhanced and stable electrocatalytic ORR activity, even in the presence of methanol, ethanol, and borohydride, opening the possibility for its application in fuel cells.

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Section: Resultsmentioning

confidence: 99%

Section: Yields Of Carbon Materials and Recovery Of Studied Ionic Liquidmentioning

confidence: 99%

Electrocatalytic Activity of Ionic‐Liquid‐Derived Porous Carbon Materials for the Oxygen Reduction Reaction

et al. 2018

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“…The phase diagrams of the binary systems LiTFSI/solvent were obtained from thermal analysis using the heat leak modulus (HLM) technique 34 since this technique is well adapted for hygroscopic and volatile liquids at low temperatures.…”

Section: Methodsmentioning

confidence: 99%

Stable solvates in solution of lithium bis(trifluoromethylsulfone)imide in glymes and other aprotic solvents: Phase diagrams, crystallography and Raman spectroscopyElectronic supplementary information (ESI) available: Crystallographic data (single crystal data) in cif format (CCDC reference number 184345). See http://www.rsc.org/suppdata/cp/b2/b203776a/

Brouillette

Irish

Taylor

et al. 2002

Phys. Chem. Chem. Phys.

282

180

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Lithium bis(trifluoromethylsulfone)imide (LiTFSI), a promising electrolyte for high energy lithium batteries, forms several stable solvates having low melting points in aprotic solvents. In a previous study (D. Brouillette, G. Perron and J. E. Desnoyers, J. Solution Chem., 1998, 27, 151), it was suggested, based on thermodynamic studies, that such stable solvates may persist in solution and influence their properties. To verify this hypothesis, phase diagrams and Raman spectra have been measured for solutions of LiTFSI in acetonitrile, propylene carbonate and glymes (n(ethyleneglycol) dimethyl ether or Gn), which have the chemical structure CH 3 -O-(CH 2 -CH 2 -O) n -CH 3 for n ¼ 1 to 4 and 10. The relative intensities of the LiTFSI and solvent Raman bands are proportional to the concentration for systems without solvates. The systems for which stable solvates were identified in the phase diagram show important changes in the relative intensities for both the LiTFSI and the solvent Raman bands at concentrations corresponding to particular stoichiometries and support the conclusion that stable solvates are present in the solutions. The structure of the crystalline G1:LiTFSI solvate was determined by X-ray crystallography. Structures for (G2) 2 :LiTFSI and (G1) 3 :LiTFSI solvates are proposed.

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“…Lipid microparticles deposited on textile exhibited a fusion temperature of 34.8°C, as determined by TA-HLM, which confirmed their solid character at room temperature (Figure 3). The latter is a method similar to differential scanning calorimetry, which allows for the measurement of fusion temperature of microparticles deposited on a textile surface [28]. This fusion temperature value is crucial to allow triggered release upon contact with the skin, which is at approximately 32°C, while maintaining a good stability upon storage at room temperature.…”

Section: Physical Properties Of Pharmaceutical Textilesmentioning

confidence: 99%

Econazole imprinted textiles with antifungal activity

Hossain

Lalloz

Benhaddou

et al. 2016

European Journal of Pharmaceutics and Biopharmaceutics

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In this work, we propose pharmaceutical textiles imprinted with lipid microparticles of Econazole nitrate (ECN) as a mean to improve patient compliance while maintaining drug activity. Lipid microparticles were prepared and characterized by laser diffraction (3.5±0.1 μm). Using an optimized screen-printing method, microparticles were deposited on textiles, as observed by scanning electron microscopy. The drug content of textiles (97±3 μg/cm(2)) was reproducible and stable up to 4 months storage at 25 °C/65% Relative Humidity. Imprinted textiles exhibited a thermosensitive behavior, as witnessed by a fusion temperature of 34.8 °C, which enabled a larger drug release at 32 °C (temperature of the skin) than at room temperature. In vitro antifungal activity of ECN textiles was compared to commercial 1% (wt/wt) ECN cream Pevaryl®. ECN textiles maintained their antifungal activity against a broad range of Candida species as well as major dermatophyte species. In vivo, ECN textiles also preserved the antifungal efficacy of ECN on cutaneous candidiasis infection in mice. Ex vivo percutaneous absorption studies demonstrated that ECN released from pharmaceutical textiles concentrated more in the upper skin layers, where the fungal infections develop, as compared to dermal absorption of Pevaryl®. Overall, these results showed that this technology is promising to develop pharmaceutical garments textiles for the treatment of superficial fungal infections.

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The HLM method: a simple way to get the solid–liquid phase diagrams and enthalpies of transition of pure components and mixtures

Cited by 9 publications

References 2 publications

Electrocatalytic Activity of Ionic‐Liquid‐Derived Porous Carbon Materials for the Oxygen Reduction Reaction

Electrocatalytic Activity of Ionic‐Liquid‐Derived Porous Carbon Materials for the Oxygen Reduction Reaction

Econazole imprinted textiles with antifungal activity

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