Spray-drying of casein/pectin bioconjugate microcapsules containing grape (Vitis labrusca) by-product extract.

Novel microcapsules containing grape peel by-product extract were obtained. In this pursuit, complex coacervation of casein/pectin bioconjugate and spray-drying were combined. We have investigated the role of the dispersion feed rate (F), drying air inlet temperature (I) and drying air flow rate (A) in the drying yield, microencapsulation efficiency, total polyphenols and anthocyanins contents, antioxidant activity, and morphology of the products.