Determination of thermomechanical properties in recycled PLA filaments for 3D printers

Authors

  • Fernando de Brito Glück
  • Édson Luiz Francisquetti
  • Alexandre Luís Gasparin

DOI:

https://doi.org/10.55905/oelv22n2-166

Keywords:

polylactic acid, additive manufacturing, PLA filament recycling, PLA thermomechanical properties

Abstract

In recent times, the issue of plastic recycling has become one of the leading issues of environmental protection and waste management. Polymer materials are found applied in many areas of daily life and industry. Along with their extended use, the problem of plastic waste appeared because, after withdrawal from use, they became persistent and noxious wastes. The possibility of reusing polymeric materials enables waste utilization to obtain consumable products. The 3D printing market is a well-growing sector. Printable filaments can be made from various thermoplastic materials, including those from recycling. This paper studies the thermal-mechanical properties of recycled polylactic acid (PLA) material filaments obtained from 3D-printed specimens. The analysis was first with the virgin filament (PLA N) and, subsequently, two recycling cycles (PLA 1 and PLA 2). There were thermal properties evaluations for the three processing types, as follows: differential scanning calorimetry (DSC), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and tensile test for both specimens and filaments. The glass transition temperatures (Tg) remained at their typical values. The same happened with the melting temperature (Tm). In the TGA, the PLA thermal stability remained constant. The FTIR presented the functional groups unaltered for the recycled samples. In the second filament recycling, the tensile strength decreased by 26%, and the maximum strain was 40%, compared to PLA N. The same occurred to PLA 2 specimens; the maximum stress and strain decreased by 45% and 31%, respectively. In terms of crystallinity, this presented a variation of 86% of the virgin material for the second recycling cycle, which correlated to tensile strength shows a weakness in the PLA recycled structure, decreasing the strain until the fracture and the tensile strength.

References

AL RASHID, A. et al. Additive manufacturing: Technology, applications, markets, and opportunities for the built environment. Automation in ConstructionElsevier B.V., , out. 2020.

ALAFAGHANI, A. et al. Experimental Optimization of Fused Deposition Modelling Processing Parameters: A Design-for-Manufacturing Approach. Procedia Manufacturing, v. 10, p. 791–803, 2017.

BADIA, J. D. et al. A methodology to assess the energetic valorization of bio-based polymers from the packaging industry: Pyrolysis of reprocessed polylactide. Bioresource Technology, v. 111, p. 468–475, 2012a.

BADIA, J. D. et al. Material valorisation of amorphous polylactide. Influence of thermo-mechanical degradation on the morphology, segmental dynamics, thermal and mechanical performance. Polymer Degradation and Stability, v. 97, n. 4, p. 670–678, 2012b.

BADÍA, J. D. et al. Assessing the MALDI-TOF MS sample preparation procedure to analyze the influence of thermo-oxidative ageing and thermo-mechanical degradation on poly (Lactide). European Polymer Journal, v. 47, n. 7, p. 1416–1428, 2011.

BANJANIN, B. et al. Consistency analysis of mechanical properties of elements produced by FDM additive manufacturing technology. Revista Materia, v. 23, n. 4, 2018.

BHAGIA, S. et al. Critical review of FDM 3D printing of PLA biocomposites filled with biomass resources, characterization, biodegradability, upcycling and opportunities for biorefineries. Applied Materials Today, v. 24, 2021.

BITENCOURT, S. S. et al. Desenvolvimento de biocompósitos de poli(L-ácido láctico) (PLLA) com serragem de madeira. Revista Materia, v. 22, n. 4, 2017.

CANCIGLIERI, O.; SELHORST, A.; SANT’ANNA, Â. M. O. Decision method for rapid prototyping processes in new products design. Gestao e Producao, v. 22, n. 2, p. 345–355, abr. 2015.

CARRASCO, F. et al. Processing of poly(lactic acid): Characterization of chemical structure, thermal stability and mechanical properties. Polymer Degradation and Stability, v. 95, n. 2, p. 116–125, 2010a.

CARRASCO, F. et al. Kinetics of the thermal decomposition of processed poly(lactic acid). Polymer Degradation and Stability, v. 95, n. 12, p. 2508–2514, 2010b.

CHADHA, A. et al. Effect of fused deposition modelling process parameters on mechanical properties of {3D} printed parts. World Journal of Engineering, v. 16, n. 4, p. 550–559, 2019.

CHIENG, B. W. et al. Epoxidized vegetable oils plasticized poly(lactic acid) biocomposites: Mechanical, thermal and morphology properties. Molecules, v. 19, n. 10, p. 16024–16038, 2014.

CHOKSI, N.; DESAI, H. Synthesis of Biodegradable Polylactic Acid Polymer By Using Lactic Acid Monomer. International Journal of Applied Chemistry, v. 13, n. 2, p. 377–384, 2017.

CRESS, A. K. et al. Effect of recycling on the mechanical behavior and structure of additively manufactured acrylonitrile butadiene styrene (ABS). Journal of Cleaner Production, v. 279, 2021.

CUIFFO, M. A. et al. Impact of the fused deposition (FDM) printing process on polylactic acid (PLA) chemistry and structure. Applied Sciences (Switzerland), v. 7, n. 6, p. 1–14, 2017.

DE ARAÚJO, J. P.; AGRAWAL1, P.; DE MÉLO, T. J. A. Blendas PLA/PEgAA: Avaliação da reatividade entre os polímeros e da concentração de PEgAA nas propriedades e na morfologia. Revista Eletrônica de Materiais e Processos, v. 3, n. 3, p. 118–127, 2015.

FRANCHETTI, S. M. M.; MARCONATO, J. C. Polímeros biodegradáveis - uma solução parcial para diminuir a quantidade dos resíduos plásticos. Química Nova, v. 29, n. 4, p. 811–816, 2006.

HERRERA-KAO, W. A. et al. Thermal degradation of poly(caprolactone), poly(lactic acid), and poly(hydroxybutyrate) studied by TGA/FTIR and other analytical techniques. Polymer Bulletin, v. 75, n. 9, p. 4191–4205, 2018.

HONG, J. H. et al. Repetitive recycling of 3D printing PLA filament as renewable resources on mechanical and thermal loads. International Journal of Modern Physics B, v. 34, n. 22–24, p. 1–5, 2020.

KIENDL, J.; GAO, C. Controlling toughness and strength of FDM 3D-printed PLA components through the raster layup. Composites Part B: Engineering, v. 180, jan. 2020.

KISTER, G.; CASSANAS, G.; VERT, M. Effects of morphology, conformation and configuration on the IR and Raman spectra of various poly(lactic acid)s. Polymer, v. 39, n. 2, p. 267–273, 1998.

KUMAR, R.; SINGH, R.; FARINA, I. On the 3D printing of recycled ABS, PLA and HIPS thermoplastics for structural applications. PSU Research Review, v. 2, n. 2, p. 115–137, 2018.

LANZOTTI, A. et al. A comparison between mechanical properties of specimens 3D printed with virgin and recycled PLA. Procedia CIRP, v. 79, p. 143–146, 2019.

LEONARDO SANTANA et al. Avaliação Da Composição Química E Das Características Térmicas De Filamentos De Pla Para Impressoras 3D De Código Aberto. Anais do IX Congresso Nacional de Engenharia Mecânica, n. January 2015, 2016.

LOVO, J. F. P.; FORTULAN, C. A.; DA SILVA, M. M. Optimal deposition orientation in fused deposition modeling for maximizing the strength of three-dimensional printed truss-like structures. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, v. 233, n. 4, p. 1206–1215, 2019.

LV, S.; ZHANG, Y.; TAN, H. Thermal and thermo-oxidative degradation kinetics and characteristics of poly (lactic acid) and its composites. Waste Management, v. 87, p. 335–344, 2019.

MAZZANTI, V.; MALAGUTTI, L.; MOLLICA, F. FDM 3D printing of polymers containing natural fillers: A review of their mechanical properties. Polymers, v. 11, n. 7, 2019.

PILLIN, I. et al. Effect of thermo-mechanical cycles on the physico-chemical properties of poly(lactic acid). Polymer Degradation and Stability, v. 93, n. 2, p. 321–328, 2008.

RASSELET, D. et al. Oxidative degradation of polylactide (PLA) and its effects on physical and mechanical properties. European Polymer Journal, v. 50, n. 1, p. 109–116, 2014.

SAGIAS, V. D.; GIANNAKOPOULOS, K. I.; STERGIOU, C. Mechanical properties of 3D printed polymer specimens. Procedia Structural Integrity, v. 10, p. 85–90, 2018.

SAINI, P.; ARORA, M.; KUMAR, M. N. V. R. Poly(lactic acid) blends in biomedical applications. Advanced Drug Delivery Reviews, v. 107, p. 47–59, 2016.

SANTANA, L. et al. A comparative study between PETG and PLA for 3D printing through thermal, chemical and mechanical characterization. Revista Materia, v. 23, n. 4, 2018.

SHARIFAH, I. S. S. et al. Thermal, Structural and Mechanical Properties of Melt Drawn Cur-loaded Poly(lactic acid) Fibers. Procedia Engineering, v. 184, p. 544–551, 2017.

SIRJANI, E.; CRAGG, P. J.; DYMOND, M. K. Glass transition temperatures, melting temperatures, water contact angles and dimensional precision of simple fused deposition model 3D prints and 3D printed channels constructed from a range of commercially available filaments. Chemical Data Collections, v. 22, ago. 2019.

SONG, Y. et al. Measurements of the mechanical response of unidirectional 3D-printed PLA. Materials & Design, v. 123, p. 154–164, 2017.

STAND., I. I.-I.; 2015, U. ISO/ASTM 52900–Additive manufacturing–general principles–terminology. v. i, p. 1–9, 2015.

STOOF, D.; PICKERING, K. Sustainable composite fused deposition modelling filament using recycled pre-consumer polypropylene. Composites Part B: Engineering, v. 135, p. 110–118, 2018.

SUÁREZ, L.; DOMÍNGUEZ, M. Sustainability and environmental impact of fused deposition modelling (FDM) technologies. International Journal of Advanced Manufacturing Technology, v. 106, n. 3–4, p. 1267–1279, 2020.

XU, R.; XIE, J.; LEI, C. Influence of melt-draw ratio on the crystalline behaviour of a polylactic acid cast film with a chi structure. RSC Advances, v. 7, n. 63, p. 39914–39921, 2017.

ZHAO, P. et al. Close-looped recycling of polylactic acid used in 3D printing: An experimental investigation and life cycle assessment. Journal of Cleaner Production, v. 197, p. 1046–1055, out. 2018.

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Published

2024-02-20

How to Cite

Glück, F. de B., Francisquetti, Édson L., & Gasparin, A. L. (2024). Determination of thermomechanical properties in recycled PLA filaments for 3D printers. OBSERVATÓRIO DE LA ECONOMÍA LATINOAMERICANA, 22(2), e3346. https://doi.org/10.55905/oelv22n2-166

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