Carbon Soot–Ionic Surfactant Mixed Layers at Water/Air Interfaces

Zabiegaj, Dominika, Santini, Eva, GuzmáN, Eduardo, Ferrari, Michele, Liggieri, Libero and Ravera, Francesca (2015) Carbon Soot–Ionic Surfactant Mixed Layers at Water/Air Interfaces. Journal of Nanoscience and Nanotechnology, 15 (5). pp. 3618-3625. ISSN 1533-4880

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An experimental study is here presented on the properties of aqueous dispersions containing carbon nanoparticles and different ionic surfactants which can modify the degree of hydrophobicity/philicity of particles favoring their transfer from the dispersion bulk to the interfacial layer. Aim of this work is to understand the particle-surfactant and particle-fluid interface interactions and their effect on those macroscopic surface properties of the mixed systems which are expected related to the stability and structure of the respective particle stabilized foams. To this purpose a systematic characterization of dispersions have been carried out, based on surface tension measurement against the surfactant concentration, using a drop Profile Analysis Tensiometer (PAT). These results have been crossed with the characterization of the bulk dispersion by Dynamic Light Scattering (DLS) and ζ-potential measurements to check the effects of surfactant on the particle aggregation and on the particle surface charge, respectively. The stability of the foams obtained with the same compositions has been also investigated and correlated to the other surface and bulk properties.

Item Type: Article
Subjects: F100 Chemistry
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Becky Skoyles
Date Deposited: 12 Nov 2018 15:03
Last Modified: 11 Oct 2019 18:45

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