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Whey protein isolate (WPI) can be used effectively to produce food-grade particles for stabilizing Pickering emulsions. In the present study, crosslinking of WPI microgels using organic acids (tannic and citric acids) is proposed to improve their functionality in emulsions containing roasted coffee oil. It was demonstrated that crosslinking of WPI by organic acids reduces the microgels' size from ≈1850 nm to 185 nm and increases their contact angle compared to conventional WPI microgels,doi:10.3390/foods10061296 fatcat:fziqaddh7nbjjkdvvvyoufccoa