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Influence of nanofibrillated cellulose on the mechanical and thermal properties of poly(lactic acid)

In this work, we used a twin-screw extruder – as an alternative to other, more energy-intensive mechanical methods – to produce nanofibrillated cellulose. Scanning electron microscopy and thermogravimetric analysis were employed to determine morphology and thermal properties of the nanofibrillated cellulose. Further, we prepared poly(lactic acid)/nanofibrillated cellulose (PLA/NFC) composites by melt blending followed by injection molding, and subsequently characterized them using mechanical testing, size exclusion chromatography and differential scanning calorimetry. Our results showed that nanofibrillated cellulose produced in a twin-screw extruder can be used as reinforcement for poly(lactic acid). Adding only 5 wt% nanofibrillated cellulose yielded improvements in the crystallization behavior of PLA. An increase in elastic modulus was observed for all PLA/NFC composites compared to neat PLA.

» Author: Matea Peri?, Robert Putz, Christian Paulik

» Reference: 10.1016/j.eurpolymj.2019.03.014

» Publication Date: 07/03/2019

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This project has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n° [605658].

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