Nanostructures in clear and homogeneous mixtures of rapeseed oil and ethanol in the presence of green additives

Abstract : Ethanol and rapeseed oil are mixed in presence of tributyl citrate, 2,5-dimethylfuran, 2-methylfuran, 2-methyl tetrahydrofuran, methyl tert butyl ether, ethyl tert butyl ether, FAME-rapeseed biodiesel, 1-heptanol and 2-ethylhexyl nitrate, at 25 °C (298.15 K). All these additives come, or can be obtained completely or partially from plants. The obtained ternary phase diagrams show a large domain of clear and homogeneous solutions and a liquid two-phase system due to the partial solubility of rapeseed oil and ethanol. All the tested additives have thus an evident co-solvent behavior for ethanol and rapeseed oil. In all the studied systems, the possible presence of nano-structures is checked with dynamic light scattering (DLS) and confirmed using static light scattering (SLS). In the system rapeseed oil/ethanol/1-heptanol, the presence of nano-structures is definitely established performing small-angle neutron scattering (SANS). The true geometry of these nano-structures could not be detected, but systematic conductivity measurements starting with the binary melt 1-heptanol/rapeseed oil in presence of LiClO4 adding ethanol show clearly a continuous transition from ethanol-in-rapeseed oil to rapeseed oil-in-ethanol mixtures passing through a bicontinuous medium.
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https://hal.umontpellier.fr/hal-02117031
Contributeur : Olivier Diat <>
Soumis le : mercredi 1 mai 2019 - 23:06:11
Dernière modification le : lundi 6 mai 2019 - 14:22:01

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Ali Khoshsima, Mohammad Reza Dehghani, Didier Touraud, Julien Marcus, Olivier Diat, et al.. Nanostructures in clear and homogeneous mixtures of rapeseed oil and ethanol in the presence of green additives. Colloid and Polymer Science, Springer Verlag, 2015, 293 (11), pp.3225-3235. ⟨10.1007/s00396-015-3765-7⟩. ⟨hal-02117031⟩

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