TY - JOUR
T1 - Biodegradable chitosan films with ZnO nanoparticles synthesized using food industry by-products—production and characterization
AU - Souza, Victor Gomes Lauriano
AU - Alves, Marta M.
AU - Santos, Catarina F.
AU - Ribeiro, Isabel A. C.
AU - Rodrigues, Carolina
AU - Coelhoso, Isabel
AU - Fernando, Ana Luisa
N1 - info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157281/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157821/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157669/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157968/PT#
UIDB/04077/2020
PTDC/BTM‐SAL/29335/2017
UIDB/04138/2020
UIDP/04138/2020
grant (2020.04441.BD) of C.R.
PY - 2021/5/27
Y1 - 2021/5/27
N2 - 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.
AB - 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.
KW - Apple
KW - Bionanocomposites
KW - Biopolymer
KW - Physical characterization
KW - Zinc oxide
UR - http://www.scopus.com/inward/record.url?scp=85107831271&partnerID=8YFLogxK
U2 - 10.3390/coatings11060646
DO - 10.3390/coatings11060646
M3 - Article
AN - SCOPUS:85107831271
VL - 11
JO - COATINGS
JF - COATINGS
SN - 2079-6412
IS - 6
M1 - 646
ER -