Transparent bionanocomposites with improved properties prepared from acetylated bacterial cellulose and poly(lactic acid) through a simple approach
authors Tome, LC; Pinto, RJB; Trovatti, E; Freire, CSR; Silvestre, AJD; Neto, CP; Gandini, A
nationality International
journal GREEN CHEMISTRY
keywords MICROFIBRILLATED CELLULOSE; THERMAL-PROPERTIES; POLYLACTIC ACID; COMPOSITES; FIBERS; NANOCOMPOSITES; SUBSTITUTION; BIOPOLYMER; MORPHOLOGY; WHISKERS
abstract The preparation and characterization of biocomposite materials with improved properties based on poly(lactic acid) (PLA) and bacterial cellulose, and, for comparative purposes, vegetal cellulose fibers, both in their pristine form or after acetylation, is reported. The composite materials were obtained through the simple and green mechanical compounding of a PLA matrix and bacterial cellulose nanofibrils (or vegetable fibers), and were characterized by TGA, DSC, tensile assays, DMA, SEM and water uptake. The bionanocomposites obtained from PLA and acetylated bacterial cellulose were particularly interesting, given the considerable improvement in thermal and mechanical properties, as evidenced by the significant increase in both elastic and Young moduli, and in the tensile strength (increments of about 100, 40 and 25%, respectively) at very low nanofiller loadings (up to 6%). These nanocomposites also showed low hygroscopicity and considerable transparency, features reported here for the first time.
publisher ROYAL SOC CHEMISTRY
issn 1463-9262
year published 2011
volume 13
issue 2
beginning page 419
ending page 427
digital object identifier (doi) 10.1039/c0gc00545b
web of science category Chemistry, Multidisciplinary; GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
subject category Chemistry; Science & Technology - Other Topics
unique article identifier WOS:000287092500026

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