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Tuning particle–particle interactions to control Pickering emulsions constituents separation

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Abstract

We demonstrate that the separation and recovery of solid-stabilized (Pickering) emulsion constituents are significantly improved via a simple filtration approach – without any additional chemical agent – by initially grafting sodium alginate (SA), a natural polysaccharide, onto silane-modified sub-micrometer silica particles. The combination of surface-grafted trimethoxy(propyl)silane (TMPS) and (3-aminopropyl)trimethoxysilane (APTMS) controls particle wettability, verified via zeta potential and contact angle measurements. Rheometry and filtration experiments reveal that further grafting of SA via APTMS enhances particle–particle and droplet–droplet interactions. This work provides an approach towards the design of environmentally friendly Pickering emulsion based chemical engineering processes with easy-to-separate and reusable particles, allowing waste reduction and reduced toxicity advantages.

Graphical abstract: Tuning particle–particle interactions to control Pickering emulsions constituents separation

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Publication details

The article was received on 24 Sep 2018, accepted on 01 Feb 2019 and first published on 11 Feb 2019


Article type: Paper
DOI: 10.1039/C8GC03007C
Citation: Green Chem., 2019, Advance Article

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    Tuning particle–particle interactions to control Pickering emulsions constituents separation

    F. Sabri, K. Berthomier, C. Wang, L. Fradette, J. R. Tavares and N. Virgilio, Green Chem., 2019, Advance Article , DOI: 10.1039/C8GC03007C

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