Bio-Composites Based on Poly(lactic acid) Containing Mallow and Eucalyptus Surface Modified Natural Fibers

Bio-Composites Based on Poly(lactic acid) Containing Mallow and Eucalyptus Surface Modified... In this work poly(lactic acid) (PLA) composites containing modified natural fillers obtained from physically and chemically treated mallow and eucalyptus fibers were prepared and characterized. The fibers were submitted to different alkaline and acid hydrolysis methods. The results showed that chemical treatment improved the thermal stability of the mallow fibers and reduced that of the eucalyptus fibers; however, there was a significant increase in the degree of crystallinity in both fibers. After the thermal and morphological analysis, the treated fibers were added to a commercial PLA matrix at 5 wt% content in a twin-screw Haake Minilab mini-extruder. First, the neat PLA was processed at 180 °C at 60, 120 and 180 rpm for 5 min to adapt the parameters to the material’s rheological characteristics. According to the results, the best conditions were obtained when processing at 120 rpm; subsequently, all of the composites were prepared using this speed. Then, the composites were characterized showing that the addition of fibers to the polymer matrix improved stiffness, which was more significant in the case of the PLA/eucalyptus fiber composites, where the treatment applied to the fibers decreased the fiber diameter and improved the surface adhesion. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Polymers and the Environment Springer Journals

Bio-Composites Based on Poly(lactic acid) Containing Mallow and Eucalyptus Surface Modified Natural Fibers

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Chemistry; Polymer Sciences; Environmental Chemistry; Materials Science, general; Environmental Engineering/Biotechnology; Industrial Chemistry/Chemical Engineering
ISSN
1566-2543
eISSN
1572-8919
D.O.I.
10.1007/s10924-018-1253-0
Publisher site
See Article on Publisher Site

Abstract

In this work poly(lactic acid) (PLA) composites containing modified natural fillers obtained from physically and chemically treated mallow and eucalyptus fibers were prepared and characterized. The fibers were submitted to different alkaline and acid hydrolysis methods. The results showed that chemical treatment improved the thermal stability of the mallow fibers and reduced that of the eucalyptus fibers; however, there was a significant increase in the degree of crystallinity in both fibers. After the thermal and morphological analysis, the treated fibers were added to a commercial PLA matrix at 5 wt% content in a twin-screw Haake Minilab mini-extruder. First, the neat PLA was processed at 180 °C at 60, 120 and 180 rpm for 5 min to adapt the parameters to the material’s rheological characteristics. According to the results, the best conditions were obtained when processing at 120 rpm; subsequently, all of the composites were prepared using this speed. Then, the composites were characterized showing that the addition of fibers to the polymer matrix improved stiffness, which was more significant in the case of the PLA/eucalyptus fiber composites, where the treatment applied to the fibers decreased the fiber diameter and improved the surface adhesion.

Journal

Journal of Polymers and the EnvironmentSpringer Journals

Published: May 31, 2018

References

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