info:eu-repo/semantics/article
Size effect of ZnO nanorods on physicochemical properties of plasticized starch composites
Fecha
2017-02Registro en:
Guz, Lucas Martín; Fama, Lucia Mercedes; Candal, Roberto Jorge; Goyanes, Silvia Nair; Size effect of ZnO nanorods on physicochemical properties of plasticized starch composites; Elsevier; Carbohydrate Polymers; 157; 2-2017; 1611-1619
0144-8617
CONICET Digital
CONICET
Autor
Guz, Lucas Martín
Fama, Lucia Mercedes
Candal, Roberto Jorge
Goyanes, Silvia Nair
Resumen
tThis work demonstrates that the size of ZnO nanorods (ZnONR) with similar aspect ratio determines sev-eral physicochemical and microbiological properties of thermoplastic starch composites (TPS/ZnONR) ata given concentration of ZnONRs. A combination of sol-gel and hydrothermal methods was developed tosynthesize ZnONR with different sizes but similar aspect ratios. Starch composites containing 1 wt.% ofZnONR were prepared by casting. Composites with smaller size nanorods (ZnONR-S) showed more effi-ciency in shielding UVA radiation and had a higher solubility and water vapor permeability than thosewith larger nanorods (ZnONR-L). Mechanical properties, biodegradability and antibacterial activity werealso influenced by the size of the ZnONR. X-ray diffraction analysis showed that composites with ZnONR-S maintained the typical B-V type starch structure, intensifying the V-type starch structure peaks, whilecomposite with ZnONR-L induced the formation of an amorphous structure, preventing starch retrogra-dation during storage. Properties affected by nanorods size are fundamental in determining composite applications.