A Study of Chemico-Physical Properties of Nanoparticles Interfacial Layers in Relation to Pickering Emulsion (Abstract/Poster in atti di convegno)

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  • A Study of Chemico-Physical Properties of Nanoparticles Interfacial Layers in Relation to Pickering Emulsion (Abstract/Poster in atti di convegno) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • Liggieri L.; Santini E.; Ravera F.; Antoni M.; Grigoriev D.; Kraegel J.; Miller R. (2009)
    A Study of Chemico-Physical Properties of Nanoparticles Interfacial Layers in Relation to Pickering Emulsion
    in International Workshop on Bubble and Drop Interfaces 2009, Thessaloniki, Greece
    (literal)
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  • Liggieri L.; Santini E.; Ravera F.; Antoni M.; Grigoriev D.; Kraegel J.; Miller R. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • In: B&D 2009 - International Workshop on Bubble and Drop Interfaces 2009 (Thessaloniki, Greece, 23-25 September 2009). Abstract, pp. 1 - 1. Aristotele University, 2009. (literal)
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  • Investigation of emulsions stabilised by micro/nanoparticles (Pickering emulsions) is a topic of increasing interest owing to the importance for many applications such as, pharmaceutical, cosmetic, foods and oil recovery, nanostructured materials and nanotechnologies. In the last years, the attention has been focused on the investigation of new systems able to stabilize emulsions, namely mixed systems composed by surfactants and solid particles. In particular, dispersions of nanometric colloidal silica dispersions, with the addition of a cationic surfactant (CTAB) have been proven to produce very stable oil-in-water emulsions [1]. In fact the adsorption of CTAB on the particle interface can be utilised to decrease in a controlled way their hydrophilicity, obtaining suitable segregation of the particles in the liquid-liquid interfacial layer, able to prevent droplet coalescence. Here we report a wide study about such system, aimed at linking stability and morphology of the obtained emulsions to a series of chemico-physical features of the nanoparticle interfacial layers. Both interfacial dilational and shear rheology of the layers have been investigated, while the layer structure has been characterised by ellipsometry and Brewster-angle microscopy. Finally cryo-SEM was utilised to investigate in the detail morphology and structures in the emulsion droplets. The results show clear correlations between different observed features, which allow for a better understanding of the mechanisms involved in the formation of the particle interfacial layer and on the stability of particle-stabilised emulsions. The work has been performed in the framework of the ESA MAP-FASES (Fundamental and Applied Studies in Emulsion Stability), in preparation of experiments exploiting the microgravity conditions available onboard the International Space Station, to investigate in detail droplet interaction during emulsion destabilisation. [1] F. Ravera et al. \"Liquid-liquid interfacial propert (literal)
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  • CNR-IENI, Genova, Aix-Marseille Université Paul Cezanne, MPI for Colloids and Interfaces - Potsdam/Golm (literal)
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  • A Study of Chemico-Physical Properties of Nanoparticles Interfacial Layers in Relation to Pickering Emulsion (literal)
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