New biocomposites based on thermoplastic starch and bacterial cellulose
authors Martins, IMG; Magina, SP; Oliveira, L; Freire, CSR; Silvestre, AJD; Neto, CP; Gandini, A
nationality International
journal COMPOSITES SCIENCE AND TECHNOLOGY
author keywords Bacterial cellulose and thermoplastic starch; Mechanical properties; Dynamic mechanical thermal analysis (DMTA); Scanning electron microscopy (SEM); Thermogravimetric analysis (TGA)
keywords NATURAL FIBERS; COMPOSITES; NANOCOMPOSITES; MICROFIBRILS; CRYSTALLITES; BEHAVIOR
abstract Bacterial cellulose, produced by Acetobacter Xylinum, was used as reinforcement in composite materials with a starch thermoplastic matrix. The composites were prepared in a single step with cornstarch by adding glycerol/water as the plasticizer and bacterial cellulose (1% and 5% w/w) as the reinforcing agent. Vegetable cellulose was also tested as reinforcement for comparison purposes. These materials were characterized by different techniques, namely TGA, XRD, DMA, tensile tests, SEM and water sorption assays. All composites showed good dispersion of the fibers and a strong adhesion between the fibers and the matrix. The composites prepared with bacterial cellulose displayed better mechanical properties than those with vegetable cellulose fibers. The Young modulus increased by 30 and 17 fold (with 5% fibers), while the elongation at break was reduced from 144% to 24% and 48% with increasing fiber content, respectively for composites with bacterial and vegetable cellulose. (C) 2009 Elsevier Ltd. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0266-3538
year published 2009
volume 69
issue 13
beginning page 2163
ending page 2168
digital object identifier (doi) 10.1016/j.compscitech.2009.05.012
web of science category Materials Science, Composites
subject category Materials Science
unique article identifier WOS:000269295900021
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journal analysis (jcr 2017):
journal impact factor 5.160
5 year journal impact factor 5.202
category normalized journal impact factor percentile 98.077
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