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Issue 19, 2018
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Nanoparticle adsorption dynamics at fluid interfaces

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Abstract

Understanding the dynamic adsorption of nanoparticles (NPs) at fluid interfaces is important for stabilizing emulsions and for the preparation of 2D NP-based materials. Here we show that the Ward–Tordai equations commonly employed to describe the dynamics of surfactant adsorption at a fluid interface combined with a Frumkin adsorption isotherm can be employed to model the diffusion-limited adsorption of NPs onto a fluid interface. In contrast to surfactants, an additional wetting equation of state (EOS) must be incorporated to characterize the dynamic interfacial tension during the adsorption of NPs to the oil–water interface. Our results show agreement between the model and experiments with NP area fractions <0.3. Slower dynamics are observed at larger area fractions, which are speculated to arise from polydispersity or re-organization at the interface. We show the model can be extended to the competitive adsorption between the NPs and a surface active species.

Graphical abstract: Nanoparticle adsorption dynamics at fluid interfaces

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Publication details

The article was received on 07 Feb 2018, accepted on 24 Apr 2018 and first published on 24 Apr 2018


Article type: Paper
DOI: 10.1039/C8SM00273H
Citation: Soft Matter, 2018,14, 3818-3828
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    Nanoparticle adsorption dynamics at fluid interfaces

    X. Hua, J. Frechette and M. A. Bevan, Soft Matter, 2018, 14, 3818
    DOI: 10.1039/C8SM00273H

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