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Issue 2, 2011
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Transparent bionanocomposites with improved properties prepared from acetylated bacterial cellulose and poly(lactic acid) through a simple approach

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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.

Graphical abstract: Transparent bionanocomposites with improved properties prepared from acetylated bacterial cellulose and poly(lactic acid) through a simple approach

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Publication details

The article was received on 13 Sep 2010, accepted on 29 Nov 2010 and first published on 04 Jan 2011


Article type: Paper
DOI: 10.1039/C0GC00545B
Green Chem., 2011,13, 419-427

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    Transparent bionanocomposites with improved properties prepared from acetylated bacterial cellulose and poly(lactic acid) through a simple approach

    L. C. Tomé, R. J. B. Pinto, E. Trovatti, C. S. R. Freire, A. J. D. Silvestre, C. P. Neto and A. Gandini, Green Chem., 2011, 13, 419
    DOI: 10.1039/C0GC00545B

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