Fabrication and Characterization of PLA/PHBV-Chitin Nanocomposites and Their Foams |
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| Authors: | Qi Guan Hani E. Naguib |
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| Affiliation: | 1. Department of Mechanical Engineering, University of Toronto, 5 King’s College Road, Toronto, ON, M5S 3G8, Canada
2. Department of Material Science and Engineering, University of Toronto, 5 King’s College Road, Toronto, ON, M5S 3G8, Canada
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| Abstract: | This paper examines the effect of biobased chitin nanowhisker fillers on the thermal, rheological, physical, mechanical and morphological properties of biobased polylactic acid (PLA) and PLA/polyhydroxybutyrate-co-valerate (PHBV) blended nanocomposites as well as the physical, mechanical and morphological properties of porous PLA and PLA/PHBV nanocomposite foams. Solid nanocomposites of PLA, PLA/PHBV and chitin nanowhiskers were manufactured through melt blending while porous nanocomposites foams were fabricated through a batch foaming process with the aid of CO2 as blowing agent. It was found that by incorporating small quantities of chitin nanowhiskers (<2 wt%) the mechanical properties of solid specimens are improved while strength and expandability of the foam can be significantly improved, yielding a homogenously distributed cell morphology with average cell size of 1.5 μm. |
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