Structural Characterization of Pluronic Micelles Swollen with Perfume Molecules
| Autor: | Sylvain Prévost, Isabelle Grillo, Isabelle Morfin |
|---|---|
| Přispěvatelé: | Institut Laue-Langevin (ILL), ILL, Laboratoire Interdisciplinaire de Physique, Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères] (LIPhy), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), morfin, isabelle |
| Rok vydání: | 2018 |
| Předmět: |
Enthalpy
02 engineering and technology 010402 general chemistry 01 natural sciences Micelle chemistry.chemical_compound Differential scanning calorimetry Electrochemistry medicine General Materials Science ComputingMilieux_MISCELLANEOUS Spectroscopy chemistry.chemical_classification Chemistry Small-angle X-ray scattering Surfaces and Interfaces Polymer Poloxamer 021001 nanoscience & nanotechnology Condensed Matter Physics [PHYS.COND.CM-SCM] Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft] 0104 chemical sciences Monomer Chemical engineering Swelling medicine.symptom 0210 nano-technology [PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft] |
| Zdroj: | Langmuir Langmuir, American Chemical Society, 2018, 34 (44), pp.13395-13408 |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | The insertion in nonionic polymer micelles (Pluronics F127) of seven essential oils and some of the pure compounds that compose them was investigated by complementary differential scanning calorimetry, small-angle X-ray, and neutron scattering (SAXS and SANS). The study revealed various insertion and swelling behaviors for the different oil molecules, an evidence of different interaction mechanisms involved between oils and Pluronic monomers. Thermodynamically, the addition of oil increased the micellization enthalpy due to an enhanced release of water molecules, leading subsequently to a decrease of the critical micellar temperature (CMT). Structurally, with oil, SANS revealed the presence of large aggregates at lower temperature than the CMT for which their size is maximal. Above the CMT, the size decreased and the equilibrium was reached a few degrees after the temperature corresponding to the maximum of the endothermic peak. At 37 °C, the detailed combined SANS and SAXS analysis demonstrated a partial phase separation between the oil and the poly(propylene oxide) core. The hydrophilic stabilizing poly(ethylene oxide) shell remains unchanged. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|