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Enzymatic-Assisted Modification of Thermomechanical Pulp Fibers to Improve the Interfacial Adhesion with Poly(lactic acid) for 3D Printing
University of Vigo, Spain.
NTNU, Norway.
RISE - Research Institutes of Sweden, Bioeconomy, PFI.
University of Vigo, Spain.
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2017 (English)In: ACS Sustainable Chemistry and Engineering, ISSN 2168-0485, Vol. 5, no 10, p. 9338-9346Article in journal (Refereed) Published
Abstract [en]

The present study is about the enzymatic modification of thermomechanical pulp (TMP) fibers for reduction of water uptake and their use in bio-based filaments for 3D printing. Additionally, TMP was used as a fiber reinforcing material and poly(lactic acid) (PLA) as the polymer matrix. The hydrophilic TMP fibers were treated via laccase-assisted grafting of octyl gallate (OG) or lauryl gallate (LG) onto the fiber surface. The modified TMP fibers showed remarkable hydrophobic properties, as demonstrated by water contact angle measurements. Filaments reinforced with OG-treated fibers exhibited the lowest water absorption and the best interfacial adhesion with the PLA matrix. Such higher chemical compatibility between the OG-treated fibers and the PLA enabled better stress transfer from the matrix to the fibers during mechanical testing, which led to the manufacture of strong filaments for 3D printing. All of the manufactured filaments were 3D-printable, although the filaments containing OG-treated fibers yielded the best results. Hence, laccase-mediated grafting of OG onto TMP fibers is a sustainable and environmentally friendly pathway for the manufacture of fully bio-based filaments for 3D printing.

Place, publisher, year, edition, pages
2017. Vol. 5, no 10, p. 9338-9346
Keywords [en]
3D printing, Biocomposites, Grafting, Laccase, Octyl gallate, PLA, TMP, Adhesion, Enzymes, Fibers, Grafting (chemical), Interfaces (materials), Lactic acid, Manufacture, Mechanical testing, Printing, Reinforced plastics, Reinforcement, Thermomechanical pulp, Thermomechanical pulping process, Water absorption, 3-D printing, Bio-composites, Chemical compatibility, Enzymatic modification, Hydrophobic properties, Laccases, Water contact angle measurement, 3D printers
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-32424DOI: 10.1021/acssuschemeng.7b02351Scopus ID: 2-s2.0-85030456430OAI: oai:DiVA.org:ri-32424DiVA, id: diva2:1153846
Note

 Funding details: COST, European Cooperation in Science and Technology

Available from: 2017-10-31 Created: 2017-10-31 Last updated: 2017-10-31Bibliographically approved

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CiteExportLink to record
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