Bionanocomposite films based on polysaccharides from banana peels.
Pectin and cellulose nanocrystals (CNCs) isolated from banana peels were used to prepare films. The effects of a reinforcing phase (CNCs) and a crosslinker (citric acid, CA) on properties of pectin films were studied. Glycerol-plasticized films were prepared by casting, with different CNC contents (0-10wt%), with or without CA. Overall tensile properties were improved by intermediate CNC contents (around 5wt%). The water resistance and water vapor barrier properties were also enhanced by CNC. Evidences were found from Fourier Transform Infrared (FTIR) spectra supporting the occurrence of crosslinking by CA. Additionally, the tensile strength, water resistance and barrier to water vapor were improved by the presence of CA. The13C ssNMR spectra indicated that both CA and CNC promoted stiffening of the polymer chains.
Federal University of Ceara, Organic and Inorganic Chemistry Department, Campus Pici, 60440-900, Fortaleza, CE, Brazil.
Túlio Ítalo S
TÍS
Oliveira
Embrapa Tropical Agroindustry, R. Dra. Sara Mesquita, 2270, Pici, 60511-110, Fortaleza, CE, Brazil.
Morsyleide F
MF
Rosa
Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA, UK.
Michael J
MJ
Ridout
Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA, UK.
Kathryn
K
Cross
Embrapa Tropical Agroindustry, R. Dra. Sara Mesquita, 2270, Pici, 60511-110, Fortaleza, CE, Brazil.
Edy S
ES
Brito
Embrapa Tropical Agroindustry, R. Dra. Sara Mesquita, 2270, Pici, 60511-110, Fortaleza, CE, Brazil.
Lorena M A
LMA
Silva
Federal University of Ceara, Organic and Inorganic Chemistry Department, Campus Pici, 60440-900, Fortaleza, CE, Brazil.
Selma E
SE
Mazzetto
Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA, UK.
Keith W
KW
Waldron
Embrapa Tropical Agroindustry, R. Dra. Sara Mesquita, 2270, Pici, 60511-110, Fortaleza, CE, Brazil. Electronic address: henriette.azeredo@embrapa.br.
Henriette M C
HMC
Azeredo
D002482:Cellulose / Q000737:chemistry; D019343:Citric Acid / Q000737:chemistry; D028521:Musa / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D010368:Pectins / Q000737:chemistry*
D019343:Citric Acid; D010368:Pectins; D002482:Cellulose
Bionanocomposites; Biopolymers; Food packaging; Polysaccharides