Volumes and heat capacities of the aqueous sodium dodecanoate/sodium perfluorooctanoate mixtures in the presence of β-cyclodextrin

Lisi, R. De; Lazzara, Giuseppe; Milioto, Stefana; Muratore, Nicola

doi:10.1039/b308354c

Cited by 22 publications

(17 citation statements)

References 31 publications

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“…This peculiar condition is well described by both the induction and the t 1/2 values that follow the order water < HNT ( HNT/NaP-FC8 ( Table 4). The strong enhancement of oxygen entrapment ability of the modified lumen is generated by the presence of only 0.86 wt% of surfactant, which corresponds to the concentration value of 5 Â 10 À5 mol kg À1 that is two order of magnitude smaller than the sodium perfluorooctanoate critical micellar concentration (0.05 mol kg À1 ) [25].…”

Section: Hybrid Hnt/surfactant: Non-foaming Nanoreservoir For Oxygen mentioning

confidence: 97%

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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Section: Hybrid Hnt/surfactant: Non-foaming Nanoreservoir For Oxygen mentioning

confidence: 97%

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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“…This value is rather intriguing as it is about one-half of the critical micellar concentration (cmc) value of NaC12 in water. 27 Keeping in mind that conventional surfactants enhance the solubility of oils in water only above the cmc 26 where micelles take place, we can conclude that we successfully exploited the peculiar morphology of HNTs to prepare sustainable inorganic micelles with remarkable affinity toward oils that are sparingly soluble in water.…”

Section: −1mentioning

confidence: 99%

Modified Halloysite Nanotubes: Nanoarchitectures for Enhancing the Capture of Oils from Vapor and Liquid Phases

Cavallaro

Milioto

Parisi

et al. 2013

ACS Appl. Mater. Interfaces

149

129

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We prepared hybrid halloysite nanotubes (HNT/sodium alkanoates) in which the inner cavity of the nanoclay was selectively modified. Physicochemical studies evidenced the interactions between HNT and sodium alkanoates, ruled out clay exfoliation, quantified the amount of the loaded substance, and showed an increase of the total net negative charge, allowing us to obtain rather stable aqueous nanoclay dispersions. These dispersions were exploited as inorganic micelles to capture hydrocarbon and aromatic oils in the vapor and liquid states and were revealed to be nonfoaming but very efficient in encapsulating oils. Here, we have fabricated biocompatibile and low-cost inorganic micelles that can be exploited for industrial applications on a large scale.

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“…This effect is well (8) for the systems for which the equilibrium constant is available. known for conventional surfactants 49,50 incorporated into the cyclodextrin cavity and, as for the ternary water + cyclodextrin + surfactant systems 49,51,52 the apparent critical micellar concentration (cmc*) can be defined as cmc* ¼ cmc + C cpx (6) where cmc is the critical micellar concentration of the copolymer in water in the absence of CD and C cpx is the concentration of the copolymer involved in the inclusion complex. According to eqn (6), once the non-complexed monomer concentration in the presence of CD reaches the cmc value micellization takes place.…”

Section: Discussion Effect Of Hp-b-cds On the Aggregated Copolymermentioning

confidence: 99%

Selectivity of cyclodextrins as a parameter to tune the formation of pseudorotaxanes and micelles supramolecular assemblies. A systematic SANS study

2011

Self Cite

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We studied the formation of polypseudorotaxanes formed with cyclodextrins (CDs) threading a copolymer chain that forms self-assembled structures in water. The size of the CD cavity was chosen such that it is block selective with respect to the formation of inclusion complexes and therefore in terms of altering the structure of the copolymer self-assemblies in a systematic fashion. Small angle neutron scattering (SANS) experiments provide a direct and clear picture of the shape and interactions of the copolymer micelles in the absence and the presence of various CDs. Moreover, the dissolution of copolymer micelles by CD addition was clearly described by a simple model which provides a tool for quantitative predictions. This study suggests the possibility of designing materials with tunable aggregation abilities in water, where the extent of aggregate formation is determined by the amount and type of added cyclodextrin.

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Volumes and heat capacities of the aqueous sodium dodecanoate/sodium perfluorooctanoate mixtures in the presence of β-cyclodextrin

Cited by 22 publications

References 31 publications

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

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

Modified Halloysite Nanotubes: Nanoarchitectures for Enhancing the Capture of Oils from Vapor and Liquid Phases

Selectivity of cyclodextrins as a parameter to tune the formation of pseudorotaxanes and micelles supramolecular assemblies. A systematic SANS study

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