TY - JOUR
T1 - Physical and structural properties of whey protein concentrate - Corn oil - TiO2 nanocomposite films for edible food-packaging
AU - Montes-de-Oca-Ávalos, Juan Manuel
AU - Altamura, Davide
AU - Herrera, María Lidia
AU - Huck-Iriart, Cristián
AU - Scattarella, Francesco
AU - Siliqi, Dritan
AU - Giannini, Cinzia
AU - Candal, Roberto Jorge
N1 - Funding Information:
This work was supported by the International CONICET-Argentina/CNR-Italy Bilateral Project entitled “TiO 2 casein polymeric composite films for food preservation”; the National Research Council of Argentina through Project ITPN-PUE 0073; and by the University of Buenos Aires through Project UBA-20020170100039BA.
Funding Information:
Roberto Lassandro is acknowledged for his technical support in the X-ray laboratory (XMI-Lab). Amancay C.T. Kugler is acknowledged for providing language help. CONICET is acknowledged for the financial of JMOA postdoctoral fellowship. MLH, RJC, and CHI are CONICET members.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/12
Y1 - 2020/12
N2 - Interest in polymer technology based on biodegradable and edible films has increased dramatically, in hopes of creating a circular economy with little to no environmental impact. In this study nanocomposite films with a glycerol/WPC ratio of 4/5 were prepared from emulsions containing 2.5, 5.0, or 7.5 wt.% WPC and 2 wt.% corn oil. Films also contained a load of 0.5 wt.% TiO2. Emulsions were prepared with two different droplet sizes: conventional (from 300 to 700 nm) and nano (from 60 to 80 nm). Films were analyzed for color, water vapor permeability, thermogravimetric, mechanical/tensile properties, infrared behavior, and structure. Advanced X-ray microscopy based on small and wide-angle scattering contrast was used to investigate the nanocomponents in the films, allowing the identification of the main scattering species. Film that was prepared from starting systems with nano droplets (60 nm), the highest protein concentration (7.5 wt.% WPC), and TiO2 loading had the greatest E’ (elastic modulus, 19.2 MPa), E (Young modulus, 19.4 MPa), and εb (elongation at break, 119 %) values. This nano-based film had suitable physical properties for cheese packaging and other similar applications. In all films, data showed a close correlation between film structure and mechanical/tensile properties.
AB - Interest in polymer technology based on biodegradable and edible films has increased dramatically, in hopes of creating a circular economy with little to no environmental impact. In this study nanocomposite films with a glycerol/WPC ratio of 4/5 were prepared from emulsions containing 2.5, 5.0, or 7.5 wt.% WPC and 2 wt.% corn oil. Films also contained a load of 0.5 wt.% TiO2. Emulsions were prepared with two different droplet sizes: conventional (from 300 to 700 nm) and nano (from 60 to 80 nm). Films were analyzed for color, water vapor permeability, thermogravimetric, mechanical/tensile properties, infrared behavior, and structure. Advanced X-ray microscopy based on small and wide-angle scattering contrast was used to investigate the nanocomponents in the films, allowing the identification of the main scattering species. Film that was prepared from starting systems with nano droplets (60 nm), the highest protein concentration (7.5 wt.% WPC), and TiO2 loading had the greatest E’ (elastic modulus, 19.2 MPa), E (Young modulus, 19.4 MPa), and εb (elongation at break, 119 %) values. This nano-based film had suitable physical properties for cheese packaging and other similar applications. In all films, data showed a close correlation between film structure and mechanical/tensile properties.
KW - Biobased films
KW - Microstructural characterization
KW - Nanocomposite films
KW - Physical properties
KW - TiO nano-load
KW - X-ray microscopy
UR - http://www.scopus.com/inward/record.url?scp=85096208988&partnerID=8YFLogxK
U2 - 10.1016/j.fpsl.2020.100590
DO - 10.1016/j.fpsl.2020.100590
M3 - Artículo (Contribución a Revista)
AN - SCOPUS:85096208988
SN - 2214-2894
VL - 26
JO - Food Packaging and Shelf Life
JF - Food Packaging and Shelf Life
M1 - 100590
ER -