Chitosan Coatings Modified with Nanostructured ZnO for the Preservation of Strawberries
Author:
García-García Dulce J.1, Pérez-Sánchez G. F.1, Hernández-Cocoletzi H.2, Sánchez-Arzubide M. G.2, Luna-Guevara M. L.2ORCID, Rubio-Rosas E.3ORCID, Krishnamoorthy Rambabu4ORCID, Morán-Raya C.1ORCID
Affiliation:
1. Ecocampus Valsequillo, ICUAP, Centro de Investigación en Fisicoquímica de Materiales, Benemérita Universidad Autónoma de Puebla, Edificio Val-3, San Pedro Zacachimapa, Puebla 72960, Mexico 2. Facultad de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y 18 sur S/N Edificio FIQ7 CU San Manuel, Puebla 72570, Mexico 3. Centro Universitario de Vinculación y Transferencia de Tecnología, Benemérita Universidad Autónoma de Puebla, Prol. 24 sur S/N CU San Manuel, Puebla 72570, Mexico 4. Department of Chemical Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
Abstract
Strawberries are highly consumed around the world; however, the post-harvest shelf life is a market challenge to mitigate. It is necessary to guarantee the taste, color, and nutritional value of the fruit for a prolonged period of time. In this work, a nanocoating based on chitosan and ZnO nanoparticles for the preservation of strawberries was developed and examined. The chitosan was obtained from residual shrimp skeletons using the chemical method, and the ZnO nanoparticles were synthesized by the close-spaced sublimation method. X-ray diffraction, scanning electron microscopy, electron dispersion analysis, transmission electron microscopy, and infrared spectroscopy were used to characterize the hybrid coating. The spaghetti-like ZnO nanoparticles presented the typical wurtzite structure, which was uniformly distributed into the chitosan matrix, as observed by the elemental mapping. Measurements of color, texture, pH, titratable acidity, humidity content, and microbiological tests were performed for the strawberries coated with the Chitosan/ZnO hybrid coating, which was uniformly impregnated on the strawberries’ surface. After eight days of storage, the fruit maintained a fresh appearance. The microbial load was reduced because of the synergistic effect between chitosan and ZnO nanoparticles. Global results confirm that coated strawberries are suitable for human consumption.
Funder
Benemérita Universidad Autónoma de Puebla
Subject
Polymers and Plastics,General Chemistry
Reference59 articles.
1. Food preservation techniques and nanotechnology for increased shelf life of fruits, vegetables, beverages and spices: A review;Sridhar;Environ. Chem. Lett.,2021 2. Characterization and antibacterial activity of edible films based on carboxymethyl cellulose, Dioscorea opposita mucilage, glycerol and ZnO nanoparticles;Li;Food Chem.,2021 3. Li, Y., Zhou, Y., Wang, Z., Cai, R., Yue, T., and Cui, L. (2021). Preparation and characterization of chitosan–nano-zno composite films for preservation of cherry tomatoes. Foods, 10. 4. Ecuyer, J.L., Audet, N., Shink, D., Triboulet, R., Benz, K.W., Fiederle, M., Lincot, D., Tomashik, V.N., and Tomashik, Z.F. (2010). CdTe and Related Compounds; Physics, Defects, Hetero- and Nano-Structures, Crystal Growth, Surfaces and Applications, Elsevier Ltd. 5. Espitia, P.J.P., Batista, R.A., Otoni, C.G., and Soares, N.F.F. (2016). Antimicrobial Food Packaging, Elsevier Inc.
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