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Tuning particle–particle interactions to control Pickering emulsions constituents separation

Faezeh Sabri, Kevin Berthomier, Chang-Sheng Wang, Louis Fradette, Jason Robert Tavares and Nick Virgilio

Article (2019)

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Cite this document: Sabri, F., Berthomier, K., Wang, C.-S., Fradette, L., Tavares, J. R. & Virgilio, N. (2019). Tuning particle–particle interactions to control Pickering emulsions constituents separation. Green Chemistry, 21(5), p. 1065-1074. doi:10.1039/c8gc03007c
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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.

Open Access document in PolyPublie
Subjects: 1800 Génie chimique > 1800 Génie chimique
1800 Génie chimique > 1806 Procédés de séparation
Department: Département de génie chimique
Research Center: CREPEC - Centre de recherche sur les systèmes polymères et composites à haute performance
Funders: Imperial Oil, Total, CRSNG/NSERC, CREPEC, Polytechnique Montréal, Canada Foundation for Innovation
Date Deposited: 03 Aug 2020 14:14
Last Modified: 04 Aug 2020 01:20
PolyPublie URL: https://publications.polymtl.ca/5335/
Document issued by the official publisher
Journal Title: Green Chemistry (vol. 21, no. 5)
Publisher: Royal Society of Chemistry
Official URL: https://doi.org/10.1039/c8gc03007c

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