Abstract
Edible coatings and films are appealing strategies for the postharvest management of blueberries. In the current work, alginate and alginate/cellulose nanofibril (CNF) edible coatings crosslinked with calcium chloride were developed for application on Andean blueberry (a promissory wild blueberry). Cocoa by-products were valorized through the isolation of their CNFs, and these were incorporated in the edible coatings. Edible coating formulations were based on blends of alginate (2% w/v), CNFs (0%, 0.1%, or 0.3%), glycerol, and water. In addition, stand-alone films were prepared, and their light and water vapor barrier properties were studied before applying the coating on the fruit surface. The results show that the addition of CNFs caused a significant decrease in the transparency and the water vapor permeability of the alginate films. After applying on the Andean blueberry fruits, the alginate and alginate/CNF coatings enhanced the appearance and the firmness of the fruits. Moreover, they significantly reduced the respiration rate and the water loss of the Andean blueberries throughout the 21 days of refrigerated storage. Alginate and alginate/CNFs coatings may be considered a useful alternative for the delay of the postharvest deterioration of Andean blueberries.
| Original language | English |
|---|---|
| Article number | 824 |
| Journal | Polymers |
| Volume | 12 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1 Apr 2020 |
Bibliographical note
Funding Information:“Francisco José de Caldas” (project 61891. Conv. 794-2017). Furthermore, A.L.-C. would like to thank the Universidad Pedagógica y Tecnológica de Colombia (UPTC) for their financial support. The authors acknowledge the Research Center for Investigation Development (CIDI) from the Universidad Pontificia Bolivariana for their financial support through the project 092C-05/18-49 and Compañía Nacional de Chocolates for providing the cocoa shell.
Funding Information:
Funding: This study was funded by Minciencias, the programa Colombia BIO, and the Gobernación de Boyacá through the Fondo de Ciencia, Tecnología e Innovación del Sistema General de Regalías, managed by the Fondo Figure 7. Changes in Andean blueberry firmness during storage. Control (■), alginate (•), alginate/CNFs 0.1% (▲), alginate/CNFs 0.3% (▼).
Funding Information:
This study was funded by Minciencias, the programa Colombia BIO, and the Gobernaci?n de Boyac? through the Fondo de Ciencia, Tecnolog?a e Innovaci?n del Sistema General de Regal?as, managed by the Fondo "Francisco Jos? de Caldas" (project 61891. Conv. 794-2017). Furthermore, A.L.-C. would like to thank the Universidad Pedag?gica y Tecnol?gica de Colombia (UPTC) for their financial support. The authors acknowledge the Research Center for Investigation Development (CIDI) from the Universidad Pontificia Bolivariana for their financial support through the project 092C-05/18-49 and Compa??a Nacional de Chocolates for providing the cocoa shell. A.L.-C. and C.M.-J. would like to thank Saporiti (Argentina) for providing the sodium alginate and to Jose Isaac Jaramillo for their important contributions.
Publisher Copyright:
© 2020 by the authors.
Keywords
- Agro-food by-products
- Biopolymers
- Edible films and coatings
- Food packaging
- Nanocellulose
- Wild blueberries
