Encapsulation of copigmented anthocyanins within polysaccharide microcapsules built upon removable CaCO3 templates. (November 2018)

• Record Type: Journal Article
• Authors: Tan, Chen; Selig, Michael Joseph; Lee, Michelle C.; Abbaspourrad, Alireza
• Is Part Of: Food hydrocolloids. Volume 84(2018)
• Page Start: 200
• Page End: 209
• Publication Date: 2018-11
• Subjects: Polysaccharide microcapsules -- Anthocyanin -- Copigmentation -- CaCO3 -- Release; Hydrocolloids -- Periodicals; Food additives -- Periodicals; Colloïdes -- Périodiques; Aliments -- Additifs -- Périodiques; Colloids; Food additives; Periodicals; Electronic journals; 664.06
• DOI: 10.1016/j.foodhyd.2018.05.036
• Languages: English
• ISSNs: 0268-005X

Abstract

Abstract: This work fabricated natural polysaccharide-based polyelectrolyte microcapsules via layer-by-layer assembly (LBL) as carriers for copigmented anthocyanins. For this purpose, the chondroitin sulfate (CHS)/anthocyanin copigmented complexes were coprecipitated into spherical templates created by formation of CaCO3 precipitates. This template complex formation is then followed by deposition of oppositely charged CHS and chitosan (CS), and subsequent dissolution of CaCO3 core. We found that copigmentation with CHS of moderate concentration increased the encapsulation efficiency of anthocyanin in CaCO3, favored anthocyanin retention in the microcapsule and improved the prolonged release of anthocyanin in a simulated gastrointestinal environment. The mechanism behind these observations was hypothesized to be related to the decreased micropolarity and microviscosity in the matrix-type interior of hybrid microcapsules. These results strongly support the combined use of polyelectrolyte microencapsulation and copigmentation techniques for the development of novel systems targeting the stabilization and controlled release of water-soluble molecules such as the anthocyanins studied herein. Graphical abstract: Image Highlights: Copigmentation and encapsulation are combined for anthocyanin stabilization. Polysaccharide-based microcapsules are fabricated layer-by-layer assembly. Chondroitin/anthocyanin complexes are preloaded in CaCO3 templates. The prolonged release of anthocyanin in gastrointestinal environment is improved.