INVESTIGADORES
MANFREDI liliana Beatriz
artículos
Título:
Development and characterization of bionanocomposites based on poly(3-hydroxybutyrate) and cellulose nanocrystals
Autor/es:
I. T. SEOANE; E. FORTUNATI; D. PUGLIA; V. P. CYRAS; L. B. MANFREDI
Revista:
POLYMER INTERNATIONAL
Editorial:
JOHN WILEY & SONS LTD
Referencias:
Lugar: Londres; Año: 2016 vol. 65 p. 1046 - 1053
ISSN:
0959-8103
Resumen:
Poly(3-hydroxybutyrate) (PHB)-based bionanocomposites were prepared using various percentages of cellulose nanocrystals(CNCs) by a solution casting method. CNCs were prepared from microcrystalline cellulose using sulfuric acid hydrolysis. The influence of CNCs on PHB properties was evaluated using differential scanning calorimetry, Fourier transform infrared spectroscopy,X-ray diffraction, thermogravimetry and tensile testing. Vapor permeation and light transmission of the materials were also measured. Differential scanning calorimetric tests demonstrated that CNCs were effective PHB nucleation agents. Tensile strength and Youngs modulus of PHB increased with increasing CNC concentration. Moreover, the PHB/CNC bionanocomposites exhibited reduced water vapor permeation compared to neat PHB and had better UV barrier properties than commodity polymers such as polypropylene. It was found that nanocomposites with 6wt% of CNCs had the optimum balance among thermal,mechanical and barrier properties.