the effect of graphene oxide nanoparticle as an additive on the equilibrium curve of aqueous two-phase systems containing polyethylene glycol 6000 and sodium tartrate

In this work, the effect of graphene oxide (go) as an additive on the equilibrium curve of aqueous two-phase system composed of polyethylene glycol (peg 6000) and sodium tartrate was studied# for this purpose, phase diagram of the system (peg 6000 + sodium tartrate + h2o) was obtained by cloud point titration method# then, the effect of adding go nanoparticle at 5 and 10 wt#% on phase diagram was investigated# also, experimental binodal data were successfully fitted to merchuk equation# according to the results, adding go at 5 wt#% increases two-phase region of the system and causes 4#59% deviation on the equilibrium curve# however, addition of 10 wt#% of go nanoparticle makes no change on the equilibrium data#