INVESTIGADORES
LOPEZ Olivia Valeria
artículos
Título:
Thermoplastic starch films reinforced with talc nanoparticles
Autor/es:
CASTILLO L; LÓPEZ O; LÓPEZ C; ZARITZKY N; GARCÍA MA; BARBOSA S; VILLAR MA
Revista:
CARBOHYDRATE POLYMERS
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 2013 vol. 95 p. 664 - 674
ISSN:
0144-8617
Resumen:
Nanocomposite films of thermoplastic corn starch (TPS) with talc particles were obtained by thermo-compression in order to study the effect of filler on structure, optical, and thermal properties. Talcincreased the films rigid phase, thus their cross-sections resulted more irregular. Talc preferential ori-entation within matrix and good compatibility between particles and TPS was observed by SEM. Slightcrystalline structure changes in TPS matrix were measured by XRD and DSC, due to talc nucleating effect.Randomly dispersed talc nanoagglomerates and individual platelets were assessed by TEM. Laminar mor-phology and nano-sized particles allowed that nanocomposite films were optically transparent. TPS?talcfilms resulted heterogeneous materials, presenting domains rich in glycerol and others rich in starch.Talc incorporation higher than 3%, w/w increased softening resistance of the nanocomposites as statedby DMA. Relaxation temperatures of glycerol-rich phase shifted to higher values since talc reduces themobility of starch chains.
