Novel bio-nanocomposite hybrids made from polylactide/nanoclay nanocomposites and short flax fibers

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1177/0892705717743293
AuthorSearch for: 1
Name affiliation
  1. National Research Council of Canada. Automotive and Surface Transportation
FormatText, Article
Journal titleJournal of Thermoplastic Composite Materials
ISBN0892-7057
1530-7980
Subjectpolylactide; cellulosic fibers; nanoclays; biocomposites; hybrid biocomposites; bio-nanocomposites
Abstract
This article aims to formulations and properties of novel hybrid biomaterials containing unique four-phase combinations of polylactide (PLA), nanoclays, flax fibers, and coupling agents. A PLA-grafted maleic anhydride (PLA-g-MA) masterbatch containing 10 wt% PLA-g-MA was obtained by reactive extrusion and was further used, after dilution, as a coupling agent. In addition, three PLA masterbatches containing 10 wt% of three different grades of nanoclays, one untreated nanoclay and two organonanoclays, were also compounded. In a subsequent extrusion step, the nanoclay masterbatches were diluted in PLA down to 4 and 2 wt% while simultaneously incorporating in each one 20 wt% of short flax fibers. Those bio-nanocomposites were compounded without and with an equivalent content of PLA-g-MA, that is, with 4 and 2 wt%, respectively, through the dilution of 10 wt% PLA-g-MA masterbatch. The effects of the nanoclay chemistries, PLA-g-MA, and of flax fibers presence on the properties of bio-nanocomposite hybrid materials were investigated. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, rheology, mechanical properties (tension, flexural, and Izod impact), and reprocess ability tests were used to characterize the bio-nanocomposite hybrid materials. In a second step, PLA-g-MA was replaced by an epoxy/styrene/acrylic copolymer for comparison purpose of their respective effect in bio-nanocomposite performances. Mechanical properties of bio-nanocomposites containing the second coupling agent were also evaluated. The effect of the epoxy/styrene/acrylic copolymer is discussed in comparison with the effect of PLA-g-MA.
Publication date
PublisherSAGE Publications
LanguageEnglish
Peer reviewedYes
NPARC number23003125
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Record identifier87347da5-645e-44fc-a2ee-c0d0a05e2fcf
Record created2018-04-26
Record modified2020-03-16
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