Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Fused Filament Fabrication of Poly (Lactic Acid) Reinforced with Silane-Treated Cellulose Fiber for 3D Printing

  • Young-Rok SEO (Department of Forest Products and Biotechnology, Kookmin University) ;
  • Birm-June KIM (Department of Forest Products and Biotechnology, Kookmin University)
  • Received : 2024.01.27
  • Accepted : 2024.05.02
  • Published : 2024.05.25
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Abstract

Various polylactic acid (PLA) blends were reinforced with untreated or silane-treated micro-sized cellulose fiber (MCF), successfully prepared as 3D printing filaments and then printed using a fused filament fabrication (FFF) 3D printer. In this study, we focused on developing 3D-printed MCF/PLA composites through silane treatment of MCF and investigating the effect of silane treatment on the various properties of FFF 3D-printed composites. Fourier transform infrared spectra confirmed the increase in hydrophobic properties of silane-treated MCF by showing the new absorption peaks at 1,100 cm-1, 1,030 cm-1, and 815 cm-1 representing C-NH2, Si-O-Si, and Si-CH2 bonds, respectively. In scanning electron microscope images of silane-treated MCF filled PLA composites, the improved interfacial adhesion between MCF and PLA matrix was observed. The mechanical properties of the 3D-printed MCF/PLA composites with silane-treated MCF were improved compared to those of the 3D-printed MCF/PLA composites with untreated MCF. In particular, the highest tensile and flexural modulus values were observed for S-MCF10 (5,784.77 MPa) and S-MCF5 (2,441.67 MPa), respectively. The thermal stability of silane-treated MCF was enhanced by delaying the initial thermal decomposition temperature compared to untreated MCF. The thermal decomposition temperature difference at T95 was around 26℃. This study suggests that the effect of silane treatment on the 3D-printed MCF/PLA composites is effective and promising.

Keywords

Acknowledgement

This work was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (NRF-2022R1F1A1076532) and 'R&D Program for Forest Science Technology (Project No. 2023473E10-2325-EE02)' provided by Korea Forest Service (Korea Forestry Promotion Institute).

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