Influence of plasticizers on thermal and mechanical properties of biocomposite filaments made from lignin and polylactic acid for 3D printing

Wasti, Sanjita; Triggs, Eldon; Farag, Ramsis; Auad, Maria; Adhikari, Sushil; Bajwa, Dilpreet; Li, Mi; Ragauskas, Arthur J.

doi:10.1016/j.compositesb.2020.108483

Influence of plasticizers on thermal and mechanical properties of biocomposite filaments made from lignin and polylactic acid for 3D printing

Journal Article · Wed Oct 21 00:00:00 EDT 2020 · Composites Part B: Engineering

DOI:https://doi.org/10.1016/j.compositesb.2020.108483· OSTI ID:1777690

Wasti, Sanjita ^[1]; ^[1]; ^[2]; Auad, Maria ^[2]; Adhikari, Sushil ^[3]; Bajwa, Dilpreet ^[4]; Li, Mi ^[5]; ^[6]

Auburn Univ., AL (United States)
Auburn Univ., AL (United States); Auburn Univ., AL (United States). Center for Polymers and Advanced Composites
Auburn Univ., AL (United States); Auburn Univ., AL (United States). Center for Bioenergy and Bioproducts
Montana State Univ., Bozeman, MT (United States)
Univ. of Tennessee, Knoxville, TN (United States). Center for Renewable Carbon
Univ. of Tennessee, Knoxville, TN (United States). Center for Renewable Carbon; Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Joint Inst. for Biological Sciences

Polylactic acid (PLA) and organosolv lignin were mixed at different ratios and extruded to obtain PLA-lignin composite filaments. PLA was replaced with lignin up to 20 wt%. Two plasticizers (polyethylene glycol (PEG) 2000 and struktol TR451) were added in varying concentrations to enhance the properties of PLA_L20 (20% lignin in PLA) composite filaments. Furthermore, the effect of lignin in PLA, and PEG, and struktol in PLA_L20 composites was investigated via tensile test, differential scanning calorimetry, thermogravimetric analysis, scanning electron microscopy, Fourier transform infrared spectroscopy of the filaments, and dynamic mechanical analysis of 3D printed samples. A 2 wt% PEG was able to enhance both tensile stress and elongation at maximum load of PLA_L20 composite by 19% and 35%, respectively, whereas struktol TR451 was able to improve elongation at maximum load by 24%.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1777690

Journal Information:: Composites Part B: Engineering, Journal Name: Composites Part B: Engineering Journal Issue: 1 Vol. 205; ISSN 1359-8368

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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42 ENGINEERING
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Influence of plasticizers on thermal and mechanical properties of biocomposite filaments made from lignin and polylactic acid for 3D printing

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