10.1021/acsami.6b00737.s002
Matthew
D. J. Quinn
Matthew
D. J.
Quinn
Khu Vu
Khu
Vu
Stephen Madden
Stephen
Madden
Shannon M. Notley
Shannon M.
Notley
Photothermal Breaking of Emulsions Stabilized with
Graphene
American Chemical Society
2016
block copolymer surfactants
interface
solution conditions
photothermal heating
particle wettability
adsorption
oil phase
phase exfoliation technique
phase separation
graphene particles
graphene wettability
droplet coalescence
Graphene Pristine graphene particles
Emulsions Stabilized
ultrastable emulsions
2016-04-07 00:00:00
Media
https://acs.figshare.com/articles/media/Photothermal_Breaking_of_Emulsions_Stabilized_with_Graphene/3178966
Pristine
graphene particles prepared using an aqueous phase exfoliation
technique have been used to promote the stabilization of emulsions
through adsorption at the oil–water interface. Highly localized
phase separation of these ultrastable emulsions could, however, be
induced through photothermal heating of the graphene particles at
the interface exposed to near-infrared light. The graphene wettability,
which is a key determinant in preventing droplet coalescence was altered
through the adsorption of nonionic block copolymer surfactants. Varying
the aqueous solution conditions influenced the hydration of the hydrophilic
component of the surfactant providing a further opportunity to alter
the overall particle wettability and, hence, stability of the emulsion.
In this way, highly stable-oil-in water emulsions were produced with
decane; however, water-in-oil emulsions were formed with toluene as
the oil phase.