TY  - JOUR
A1  - Friberg, Stig E.
A1  - Kovach, Ildiko
A1  - Koetz, Joachim
T1  - Equilibrium topology and partial inversion of Janus Drops - a numerical analysis
JF  - ChemPhysChem : a European journal of chemical physics and physical chemistry
N2  - The equilibrium topology of an aqueous Janus emulsion of two oils, O1 and O2, with water, W, [(O1+O2)/W], is numerically evaluated with the following realistic interfacial tensions (): (O2/W)=5 mNm(-1), (O1/O2)=1 mNm(-1), and (O1/W) varies within the range 4-5 mNm(-1), which is the limiting range for stable Janus drop topology. The relative significance of the two independently pivotal factors for the topology is evaluated, that is, the local equilibrium at the line of contact between the three liquids and the volume fraction of the two dispersed liquids within the drop. The results reveal a dominant effect of the local equilibrium on the fraction of the O2 drop surface that is covered by O1. In contrast, for a constant volume of O2, the impact of the interfacial tension balance on the limit of the coverage is modest for an infinite volume of O1. Interestingly, when the O1 volume exceeds this value, an emulsion inversion occurs, and the O1 portion of the (O1+O2)/W topology becomes a continuous phase, generating a (W+O2)/O1 Janus configuration.
KW  - emulsion inversion
KW  - interfaces
KW  - janus emulsions
KW  - liquids
KW  - semiempirical calculations
Y1  - 2013
U6  - https://doi.org/10.1002/cphc.201300635
SN  - 1439-4235
SN  - 1439-7641
VL  - 14
IS  - 16
SP  - 3772
EP  - 3776
PB  - Wiley-VCH
CY  - Weinheim
ER  -