Apparent Molar Volumes of Some Hydrogenated and Fluorinated Alcohols in Sodium Dodecanoate and Sodium Perfluorooctanoate Aqueous Solutions

Milioto, Stefana; Crisantino, R.; Lisi, R. De; Inglese, A.

doi:10.1021/la00003a009

Cited by 32 publications

(33 citation statements)

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“…In the presence of L64, V Φ ,R was independent of time in the whole range of copolymer concentration studied. A similar result was obtained for F 7 BuOH in classical surfactants at 298 K …”

Section: Methodssupporting

confidence: 86%

Volumes of Polar Additives in Aqueous Solutions of the Poly(ethylene oxide)₁₃−Poly(propylene oxide)₃₀− Poly(ethylene oxide)₁₃ Triblock Copolymer at 293 and 301 K

Lisi

Milioto

1999

Langmuir

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Density measurements of poly(ethylene oxide)13−poly(propylene oxide)30−poly(ethylene oxide)13 (L64)−water and alcohol−L64−water systems were carried out at 293 and 301 K. The alcohols studied are propanol to pentanol and 2,2,2-trifluoroethanol (F3EtOH) to 2,2,3,3,4,4,4-heptafluorobutanol (F7BuOH). From the experimental data of the water−L64 binary system as functions of L64 concentration (m C), the partial molar volumes of L64 in the standard state and in the aqueous and micellar phases were calculated. At both temperatures L64 micelle is formed by a core of pure polypropylene oxide units and a hydrated shell of poly(ethylene oxide) units. In the case of the ternary systems, the apparent molar volumes of alcohol (V Φ ,R), at a fixed concentration, as functions of m C were determined. At 293 K, only the premicellar region was studied because the viscosity of the solutions in the micellar region did not permit us to obtain reliable density values. For hydrogenated alcohols as well as for F3EtOH, V Φ ,R as functions of m C are concave curves while for F7BuOH the curve is convex. At 301 K, V Φ ,R of hydrogenated alcohols slightly depends on m C up to the cmc beyond which it increases monotonically with the concentration. The trends of V Φ ,R vs m C for the fluorinated alcohols are peculiar since at ≈0.07 mol kg-1 (micellar region) they show anomalies which are more pronounced the more hydrophobic the alcohol is. The latter were ascribed to structural changes of the aggregates. On the basis of an equation previously reported, from the V Φ ,R data as functions of m C, the partial molar volumes of alcohol in the aqueous and the micellar phases and the distribution constant of alcohol between the two pseudophases were derived.

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Section: Methodssupporting

confidence: 86%

Volumes of Polar Additives in Aqueous Solutions of the Poly(ethylene oxide)₁₃−Poly(propylene oxide)₃₀− Poly(ethylene oxide)₁₃ Triblock Copolymer at 293 and 301 K

Lisi

Milioto

1999

Langmuir

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“…Within the experimental errors, the properties extrapolated at infinite dilution do not reflect differences between HNT and the hybrid material (Table 2). By using the surfactant loading from Table 1, the v°value for NaPFC8 (0.458 cm 3 g À1 ) [20] and HNT, one can calculate v°for the composite material by means of the rule of mixtures. As a result, the change in v°for HNT/NaPFC8 with respect to…”

Section: Physico-chemical Characterization Of Functionalized Halloysimentioning

confidence: 99%

Halloysite nanotube with fluorinated lumen: Non-foaming nanocontainer for storage and controlled release of oxygen in aqueous media

Cavallaro

Milioto

Palmisano

et al. 2014

Journal of Colloid and Interface Science

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Halloysite clay nanotubes were selectivity modified by adsorbing perfluoroalkylated anionic surfactants at the inner surface. The modified nanotubes formed kinetically stable dispersions due to the enhanced electrostatic repulsions exercised between the particles. We proved that the modified nanotubes can be used as non-foaming oxygen nanocontainers in aqueous media. The gas release from supersaturated dispersions can be controlled by external stimuli and system composition. In conclusion, we managed to put forward an easy strategy to develop smart materials from natural nanoclays, which can endow important applications like the storage and delivery of gas.

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“…In the case of oils with n c = 3 one highlights the role played by the polar head; K b values for 1-chloropropane and 1-nitropropane are comparable and larger by one order of magnitude than K b of 1-propanol. The latter exhibits also a small affinity to the micelles of conventional surfactants (sodium dodecanoate [48], sodium perfluorooctanoate [49] and dodecyldimethlamine oxide [50]). As concerns 1-nitropropane, it emerges that K b in dodecyltrimethylammonium bromide [51] (K b = 8 kg mol À1 ) is lower than K b in T1107, which in turn is lower than K b in EO 13 PO 30 EO 13 (K b = 51.7 ± 0.5 dm 3 mol À1 ) [32].…”

Section: Energetic Aspects Of Oils Incorporation Into Polymeric Micellesmentioning

confidence: 99%

Copolymers sensitive to temperature and pH in water and in water+oil mixtures: A DSC, ITC and volumetric study

Lisi

Giammona

Lazzara

et al. 2011

Journal of Colloid and Interface Science

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Apparent Molar Volumes of Some Hydrogenated and Fluorinated Alcohols in Sodium Dodecanoate and Sodium Perfluorooctanoate Aqueous Solutions

Cited by 32 publications

References 0 publications

Volumes of Polar Additives in Aqueous Solutions of the Poly(ethylene oxide)₁₃−Poly(propylene oxide)₃₀− Poly(ethylene oxide)₁₃ Triblock Copolymer at 293 and 301 K

Volumes of Polar Additives in Aqueous Solutions of the Poly(ethylene oxide)₁₃−Poly(propylene oxide)₃₀− Poly(ethylene oxide)₁₃ Triblock Copolymer at 293 and 301 K

Halloysite nanotube with fluorinated lumen: Non-foaming nanocontainer for storage and controlled release of oxygen in aqueous media

Copolymers sensitive to temperature and pH in water and in water+oil mixtures: A DSC, ITC and volumetric study

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Apparent Molar Volumes of Some Hydrogenated and Fluorinated Alcohols in Sodium Dodecanoate and Sodium Perfluorooctanoate Aqueous Solutions

Cited by 32 publications

References 0 publications

Volumes of Polar Additives in Aqueous Solutions of the Poly(ethylene oxide)13−Poly(propylene oxide)30− Poly(ethylene oxide)13 Triblock Copolymer at 293 and 301 K

Volumes of Polar Additives in Aqueous Solutions of the Poly(ethylene oxide)13−Poly(propylene oxide)30− Poly(ethylene oxide)13 Triblock Copolymer at 293 and 301 K

Halloysite nanotube with fluorinated lumen: Non-foaming nanocontainer for storage and controlled release of oxygen in aqueous media

Copolymers sensitive to temperature and pH in water and in water+oil mixtures: A DSC, ITC and volumetric study

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Volumes of Polar Additives in Aqueous Solutions of the Poly(ethylene oxide)₁₃−Poly(propylene oxide)₃₀− Poly(ethylene oxide)₁₃ Triblock Copolymer at 293 and 301 K

Volumes of Polar Additives in Aqueous Solutions of the Poly(ethylene oxide)₁₃−Poly(propylene oxide)₃₀− Poly(ethylene oxide)₁₃ Triblock Copolymer at 293 and 301 K