Complexation of WPI and microwave-assisted extracted agars with different physicochemical properties

► Agars from Gracilaria vermiculophylla were extracted under different MAE conditions. ► Different MAE conditions result in polyelectrolytes with distinct properties. ► The formation of coacervates between MAE agars and WPI was followed by O.D. and ITC. ► WPI/agar interactions were monitored as a function of agar, pH and ionic strength. ► The binding of WPI to MAE agars samples has been shown different contributions.