eprintid: 1503514
rev_number: 35
eprint_status: archive
userid: 608
dir: disk0/01/50/35/14
datestamp: 2017-01-18 18:29:54
lastmod: 2021-09-19 22:54:29
status_changed: 2017-01-18 18:29:54
type: article
metadata_visibility: show
creators_name: Sicard, F
creators_name: Striolo, A
title: Numerical analysis of Pickering emulsion stability: insights from ABMD simulations
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F43
keywords: Science & Technology, Physical Sciences, Chemistry, Physical, Chemistry, Molecular-dynamics Simulations, Mesoscopic Simulation, Water/oil Interface, Self-diffusion, Nanoparticles, Coalescence, Particles, Systems, Fluid, Behavior
note: Copyright © The Royal Society of Chemistry 2016.
abstract: The issue of the stability of Pickering emulsions is tackled at a mesoscopic level using dissipative particle dynamics simulations within the Adiabatic Biased Molecular Dynamics framework. We consider the early stage of the coalescence process between two spherical water droplets in a decane solvent. The droplets are stabilized by Janus nanoparticles of different shapes (spherical and ellipsoidal) with different three-phase contact angles. Given a sufficiently dense layer of particles on the droplets, we show that the stabilization mechanism strongly depends on the collision speed. This is consistent with a coalescence mechanism governed by the rheology of the interfacial region. When the system is forced to coalesce sufficiently slowly, we investigate at a mesoscopic level how the ability of the nanoparticles to stabilize Pickering emulsions is discriminated by nanoparticle mobility and the associated caging effect. These properties are both related to the interparticle interaction and the hydrodynamic resistance in the liquid film between the approaching interfaces.
date: 2016-10-01
date_type: published
publisher: ROYAL SOC CHEMISTRY
official_url: http://dx.doi.org/10.1039/c6fd00055j
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
article_type_text: Article
verified: verified_manual
elements_id: 1141268
doi: 10.1039/c6fd00055j
lyricists_name: Sicard, Francois
lyricists_name: Striolo, Alberto
lyricists_id: FSICA06
lyricists_id: ASTRI68
actors_name: Striolo, Alberto
actors_id: ASTRI68
actors_role: owner
full_text_status: public
publication: Faraday Discussions
volume: 191
pagerange: 287-304
pages: 18
issn: 1359-6640
citation:        Sicard, F;    Striolo, A;      (2016)    Numerical analysis of Pickering emulsion stability: insights from ABMD simulations.                   Faraday Discussions , 191    pp. 287-304.    10.1039/c6fd00055j <https://doi.org/10.1039/c6fd00055j>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/1503514/1/preview-arXiv.pdf