RE: Water in Diesel - can anybody do it30 Nov 2025 14:03
Yes, WIO and OIW are surprisingly different.
Surface chemists typically to refer to these elements as phases (water phase, oil phase). The 'outermost' phase is the continuous phase, the inner phase called 'dispersed'.
The continuous phase tends to have by far the greatest influence on the viscosity. Hence, if you can have water as your continuous phase, you can control the viscosity very precisely by varying the amount of water (and water's viscosity is low compared to heavy oil). That's what we have with Quadrise MSAR/bioMSAR/MSAR Zero — it's an OIW, with water being the continuous phase and oil being the dispersed phase.
As you reduce the amount of water in the continuous phase, you get more interactions with and between the phases, allowing more influence of the dispersed phase. For example, particle-particle interactions, surface interactions, forces, etc... And the viscosity goes up (e.g. van der Waals forces, hydrodynamic effects, surface chemistry magic, etc).
It is surely a gross oversimplification, but I like to think of viscosity as a kind of inter-molecular friction, and as molecules interact more with each other, that increases the viscosity as if there's more friction, because the molecules don't want to be pulled apart. Almost like rubbing increasingly coarse sandpaper.