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Polymers 2018, 10(3), 314;

3D Printable Filaments Made of Biobased Polyethylene Biocomposites

Department of Chemical Engineering, Edificio Isaac Newton, Lagoas-Marcosende s/n, University of Vigo, 36310 Vigo, Spain
Department of Mechanical and Industrial Engineering, NTNU, 7491 Trondheim, Norway
RISE PFI, Høgskoleringen 6b, 7491 Trondheim, Norway
Author to whom correspondence should be addressed.
Received: 21 February 2018 / Revised: 9 March 2018 / Accepted: 10 March 2018 / Published: 13 March 2018
(This article belongs to the Special Issue Polymers from Renewable Resources)
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Two different series of biobased polyethylene (BioPE) were used for the manufacturing of biocomposites, complemented with thermomechanical pulp (TMP) fibers. The intrinsic hydrophilic character of the TMP fibers was previously modified by grafting hydrophobic compounds (octyl gallate and lauryl gallate) by means of an enzymatic-assisted treatment. BioPE with low melt flow index (MFI) yielded filaments with low void fraction and relatively low thickness variation. The water absorption of the biocomposites was remarkably improved when the enzymatically-hydrophobized TMP fibers were used. Importantly, the 3D printing of BioPE was improved by adding 10% and 20% TMP fibers to the composition. Thus, 3D printable biocomposites with low water uptake can be manufactured by using fully biobased materials and environmentally-friendly processes. View Full-Text
Keywords: laccase; grafting; TMP; BioPE; biocomposites; lauryl gallate; octyl gallate; 3D printing laccase; grafting; TMP; BioPE; biocomposites; lauryl gallate; octyl gallate; 3D printing

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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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Filgueira, D.; Holmen, S.; Melbø, J.K.; Moldes, D.; Echtermeyer, A.T.; Chinga-Carrasco, G. 3D Printable Filaments Made of Biobased Polyethylene Biocomposites. Polymers 2018, 10, 314.

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