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Polymers 2019, 11(1), 117;

Recyclable and Mendable Cellulose-Reinforced Composites Crosslinked with Diels–Alder Adducts

Display Materials & Components Research Center, Korea Electronics Technology Institute, 25 Saenari-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 13509, Korea
Kwangsung Corporation Co., Ltd. 212-14, Neungan-gil, Songsan-myeon, Dangjin-Si, Chungcheongnam-do 31711, Korea
Author to whom correspondence should be addressed.
Received: 8 October 2018 / Revised: 17 December 2018 / Accepted: 6 January 2019 / Published: 11 January 2019
(This article belongs to the Special Issue Recycling of Polymers and Multiphase Polymer-Based Systems)
PDF [4596 KB, uploaded 11 January 2019]


Owing to their natural abundance and exceptional mechanical properties, cellulose fibers (CFs) have been used for reinforcing polymers. Despite these merits, dispersing hydrophilic CFs in a hydrophobic polymer matrix is challenging. To address this, an amphiphilic ammonium salt was employed as the dispersant for CFs in this study. The hydrophobic CFs were mixed with a healable polymer to produce CF-reinforced composites. As the thermosetting polymer was crosslinked with Diels–Alder (DA) adducts, it was mended and recycled via a retro DA reaction at 120 °C. Interestingly, the CF-reinforced polymer composites were mended and recycled as well. When 5 wt % of the hydrophobic CFs was added to the polymer, maximum tensile strength, elongation at break, Young’s modulus, and toughness increased by 70%, 183%, 75%, and 420%, respectively. After recycling, the CF-reinforced composites still featured better mechanical properties than recycled polymer. View Full-Text
Keywords: cellulose; reinforced; composite; healing; recycling cellulose; reinforced; composite; healing; recycling

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Park, K.; Shin, C.; Song, Y.-S.; Lee, H.-J.; Shin, C.; Kim, Y. Recyclable and Mendable Cellulose-Reinforced Composites Crosslinked with Diels–Alder Adducts. Polymers 2019, 11, 117.

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