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Gum Arabic modified nano-nutriosomes for curcumin encapsulation: Characterization, influence on physicochemical,
Zineb Ould Yahia1, Lianghua Xie2, Ahmed K Rashwan3
1Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
Abstract:
As a hydrophobic compound, curcumin (Cur) requires modification to enhance stability in aqueous media, allowing its application in hydrophilic food matrix. This study aimed to improve the physicochemical stability of curcumin encapsulated in nano-nutriosomes (NU) decorated with gum Arabic (GA) polymer and their incorporation influence on the yogurt (Ygr) properties during 21 days of cold storage. The novel NU were nanosized (< 200 nm), with high encapsulation efficiency >90 % for Cur, spherical in shape, with an acceptable PDI < 0.3. The GA-Cur-NU significantly (p < 0.05) improved the Cur stability under thermal, pH and ionic conditions, as well as controlling the in vitro Cur release in PBS and different food simulants, confirming the improving effect of GA for better Cur stability. However, due to NU dispersion commercializing challenges in food, freeze-drying was employed to facilitate its application. Interestingly, The Cur was highly protected in freeze-dried FZD GA-Cur-NU with an encapsulation efficiency of 97.35 % compared to FZD Cur-NU 93.68 %. The yogurt gel network was strengthened after Cur-NU and GA-Cur-NU addition, improving the physicochemical properties, water holding capacity, color, texture, microstructure and LAB count of yogurt. Overall, the GA-coated NU could be a nano-carrier for Cur encapsulation and controlled delivery.
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