title: Chitosan-cellulose nanocrystal microencapsulation to improve encapsulation efficiency and stability of entrapped fruit anthocyanins.
abstract: For improving stability of fruit anthocyanins (ACN), this study investigated the use of cellulose nanocrystal (CNC) as a macroion crosslinking agent to develop blueberry anthocyanin extract (BB)-loaded chitosan (CH)-CNC microcapsules, and compared with CH-sodium tripolyphosphate (TPP) ones. The yield of microcapsules (∼6.9g) and total monomeric anthocyanin recovery (∼94%) were significantly (P<0.05) higher in CH-CNC microcapsules than those (∼0.3g and ∼33%, respectively) in CH-TPP microcapsules. ACN distribution (%) in CH-CNC microcapsules was 61% on the surfaces, 12% bound with the matrix, and 27% in cores, but that in CH-TPP microcapsules was mostly presented on the surfaces (99%). CH-CNC microcapsules were more stable at pH 7.4 buffer by showing less ACN release (%) than that of CH-TPP, but no difference at pH 1.2. CH-CNC and CH-TPP microcapsules showed different structural and morphological properties. This study demonstrated that CNC is a promising crosslinking agent forming stable BB-loaded CH microcapsules.
authors.affiliation: Department of Food Science and Technology, 100 Wiegand Hall, Oregon State University, Corvallis, OR 97331-6602, USA. Electronic address: wenjie.wang@oregonstate.edu.
authors.forename: Wenjie
authors.initials: W
authors.lastname: Wang
authors.affiliation: Department of Food Science and Technology, 100 Wiegand Hall, Oregon State University, Corvallis, OR 97331-6602, USA. Electronic address: jooyeoun.jung@oregonstate.edu.
authors.forename: Jooyeoun
authors.initials: J
authors.lastname: Jung
authors.affiliation: Department of Food Science and Technology, 100 Wiegand Hall, Oregon State University, Corvallis, OR 97331-6602, USA. Electronic address: yanyun.zhao@oregonstate.edu.
authors.forename: Yanyun
authors.initials: Y
authors.lastname: Zhao
mesh_terms: D000872:Anthocyanins / Q000737:chemistry*; D002482:Cellulose; D048271:Chitosan; D004339:Drug Compounding; D005638:Fruit; D053758:Nanoparticles / Q000737:chemistry*; D029796:Vaccinium / Q000737:chemistry
chemical_list: D000872:Anthocyanins; D002482:Cellulose; D048271:Chitosan
keywords: Blueberry anthocyanin; Cellulose nanocrystal; Chitosan; Ionic gelation encapsulation