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Open AccessArticle

3D Printing of UV-Curable Polyurethane Incorporated with Surface-Grafted Nanocellulose

1
Research Center for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia
2
Department of Chemical & Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia
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Kolej GENIUS Insan, Universiti Sains Islam Malaysia, Bandar Baru Nilai 71800, Malaysia
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Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia
5
Advanced Materials Research Cluster, Faculty of Bioengineering and Technology, Universiti Malaysia Kelantan, Jeli Kampus, Jeli 17600, Malaysia
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(12), 1726; https://doi.org/10.3390/nano9121726
Received: 26 September 2019 / Revised: 11 November 2019 / Accepted: 2 December 2019 / Published: 3 December 2019
(This article belongs to the Special Issue Advanced Nanocomposites for 3D Printing Applications)
The recognition of nanocellulose has been prominent in recent years as prospect materials, yet the ineffectiveness of nanocellulose to disperse in an organic solvent has restricted its utilization, especially as a reinforcement in polymer nanocomposite. In this study, cellulose has been isolated and defibrillated as cellulose nanofibrils (CNF) from oil palm empty fruit bunch (EFB) fibers. Subsequently, to enhance its compatibility with UV-curable polyurethane (PU)-based resin, the surface hydrophilicity of CNF has been tailored with polyethylene glycol (PEG), as well as reduced graphene oxide (rGO). The dispersibility of reinforced modified CNF in UV-curable PU was examined through the transmittance interruption of resin, chemical, and mechanical properties of the composite printed using the stereolithographic technique. Evidently, the enhanced compatibility of modified CNF and UV-curable PU was shown to improve the tensile strength and hardness of the composites by 37% and 129%, respectively.
Keywords: additive manufacturing; cellulose nanofibrils; nanocomposites; nanoindentation; stereolithography additive manufacturing; cellulose nanofibrils; nanocomposites; nanoindentation; stereolithography
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MDPI and ACS Style

Mohan, D.; Sajab, M.S.; Kaco, H.; Bakarudin, S.B.; Noor, A.M. 3D Printing of UV-Curable Polyurethane Incorporated with Surface-Grafted Nanocellulose. Nanomaterials 2019, 9, 1726.

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