Open AccessPreparation of amphiphilic Janus particles and their application in stabilising foams
Author(s) -
Wang Keliang,
Wang Gang,
Lu Chunjing,
Wang Ying
Publication year - 2018
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2017.0597
Subject(s) - surface tension , materials science , adsorption , amphiphile , emulsion , janus , bubble , particle (ecology) , pickering emulsion , particle size , chemical engineering , volume (thermodynamics) , volume fraction , gibbs isotherm , chromatography , composite material , nanotechnology , thermodynamics , chemistry , organic chemistry , polymer , copolymer , engineering , physics , oceanography , parallel computing , geology , computer science
This work presents the preparation of foaming Janus particles (JPs) decorated with fluorinated chains by the Pickering emulsion method and investigates their self‐assembly behaviour at the air–water interface and foam stability under a limited range of concentrations. When the particle concentration reached 0.6 wt%, the adsorption of the JPs at the interface was saturated and the equilibrium surface tension dropped to around 38 mN/m even after an increase in the particle concentration. When the particle concentration reached 0.4 wt%, the Gibbs stability criterion was fulfilled. During the observation period, the foam volume was maintained relatively constant and the bubble size exhibited no significant changes. Additionally, the liquid fraction of the foam exhibited static equilibrium at different observed concentrations, which demonstrated effective drainage arrest. Overall, the present work validated the efficiency of the fluorinated JPs in stabilising the foams.