A cleaner processing approach for cellulose reinforced thermoplastic polyurethane nanocomposites
Article
Amin, Khairatun Najwa Mohd, Chaleat, Celine, Edwards, Grant, Martin, Darren J. and Annamalai, ratheep Kumar. 2022. "A cleaner processing approach for cellulose reinforced thermoplastic polyurethane nanocomposites." Polymer Engineering and Science. 62 (3), pp. 949-961. https://doi.org/10.1002/pen.25899
Article Title | A cleaner processing approach for cellulose reinforced thermoplastic polyurethane nanocomposites |
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ERA Journal ID | 1692 |
Article Category | Article |
Authors | Amin, Khairatun Najwa Mohd, Chaleat, Celine, Edwards, Grant, Martin, Darren J. and Annamalai, ratheep Kumar |
Journal Title | Polymer Engineering and Science |
Journal Citation | 62 (3), pp. 949-961 |
Number of Pages | 13 |
Year | 2022 |
Publisher | John Wiley & Sons |
Place of Publication | United States |
ISSN | 0032-3888 |
1548-2634 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/pen.25899 |
Web Address (URL) | https://4spepublications.onlinelibrary.wiley.com/doi/10.1002/pen.25899 |
Abstract | In a manner of addressing challenges in scalable processing of thermoplastic polyurethane (TPU) nanocomposites through extrusion methods, this study reports a very clean processing approach of incorporating cellulose nanocrystal (CNC) into a TPU matrix, with no acid or organic-solvents usage. It involves a mechanical deconstruction of microcrystalline cellulose (MCC) into nanoscale particles in water and polyol through scalable bead-milling, vacuum drying, and followed by twin-screw reactive extrusion with isocyanate and chain extender. The thermal stability of CNC was higher than that of typically acid-hydrolyzed CNC and suitable for processing with the precursors of TPU at typical processing temperature range (175–190°C). The CNC incorporation at very low loadings (0.5, 0.8 wt%) through this methodology resulted in substantial enhancements in tensile properties (for example, up to 28% in strength and toughness) without any significant stiffening effect. Moreover, the nanocomposites retained elastic properties, including elongation at break (%), resilience, and creep resistance. Their chemical properties and thermal transitions were also found to support the retained thermoplastic behavior while improving mechanical performance. |
Keywords | cellulose nanocrystal (cnc); microcrystalline cellulose (MCC); nanocomposites; reactive extrusion; thermoplastic polyurethane |
ANZSRC Field of Research 2020 | 340303. Nanochemistry |
400408. Reaction engineering (excl. nuclear reactions) | |
401609. Polymers and plastics | |
Byline Affiliations | University of Queensland |
School of Agriculture and Environmental Science |
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