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Article

Biodegradable Chitosan Films with ZnO Nanoparticles Synthesized Using Food Industry By-Products—Production and Characterization

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MEtRICs, Departamento de Ciências e Tecnologia da Biomassa, NOVA School of Science and Technology|FCT NOVA, Campus de Caparica, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
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CQE Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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EST Setúbal, CDP2T, Instituto Politécnico de Setúbal, Campus IPS, 2910 Setúbal, Portugal
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Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Avenida Prof. Gama Pinto, 1649-003 Lisboa, Portugal
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LAQV-REQUIMTE, Departamento de Química, NOVA School of Science and Technology|FCT NOVA, Campus de Caparica, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
*
Author to whom correspondence should be addressed.
Present address: INL, International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330 Braga, Portugal.
Academic Editor: Fengwei Xie
Coatings 2021, 11(6), 646; https://doi.org/10.3390/coatings11060646
Received: 16 April 2021 / Revised: 18 May 2021 / Accepted: 24 May 2021 / Published: 27 May 2021
(This article belongs to the Special Issue Biodegradable Films and Composite Coatings: Current and Future Trends)
This work aimed to produce bionanocomposites of chitosan incorporated with zinc oxide nanoparticles (ZnO NPs) synthesized using food industry by-products and to characterize them. Such nanoparticles are highlighted due to their low cost, antimicrobial activity, accessibility, and sustainability synthesis. Four different levels of ZnO NPs (0, 0.5, 1.0, and 2.0% w/w of chitosan) were tested, and the bionanocomposites were characterized in terms of their hydrophobicity, mechanical, optical, and barrier properties. Overall, the incorporation of ZnO NPs changed the composites from brittle to ductile, with enhanced elongation at break and reduced Young Modulus and tensile strength. Thus, ZnO NPs acted as plasticizer, turning the films more flexible, due to the presence of organic compounds on the NPs. This also favored permeability of oxygen and of water vapor, but the good barrier properties were maintained. Optical properties did not change statistically with the ZnO NPs incorporation. Thus, the characterization presented in this paper may contribute to support a decision on the choice of the material’s final application. View Full-Text
Keywords: apple; zinc oxide; biopolymer; bionanocomposites; physical characterization apple; zinc oxide; biopolymer; bionanocomposites; physical characterization
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MDPI and ACS Style

Souza, V.G.L.; Alves, M.M.; Santos, C.F.; Ribeiro, I.A.C.; Rodrigues, C.; Coelhoso, I.; Fernando, A.L. Biodegradable Chitosan Films with ZnO Nanoparticles Synthesized Using Food Industry By-Products—Production and Characterization. Coatings 2021, 11, 646. https://doi.org/10.3390/coatings11060646

AMA Style

Souza VGL, Alves MM, Santos CF, Ribeiro IAC, Rodrigues C, Coelhoso I, Fernando AL. Biodegradable Chitosan Films with ZnO Nanoparticles Synthesized Using Food Industry By-Products—Production and Characterization. Coatings. 2021; 11(6):646. https://doi.org/10.3390/coatings11060646

Chicago/Turabian Style

Souza, Victor G.L., Marta M. Alves, Catarina F. Santos, Isabel A.C. Ribeiro, Carolina Rodrigues, Isabel Coelhoso, and Ana L. Fernando. 2021. "Biodegradable Chitosan Films with ZnO Nanoparticles Synthesized Using Food Industry By-Products—Production and Characterization" Coatings 11, no. 6: 646. https://doi.org/10.3390/coatings11060646

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