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Enhanced Mechanical, Thermal and Antimicrobial Properties of Additively Manufactured Polylactic Acid with Optimized Nano Silica Content

The scope of this work was to create, with melt mixing compounding process, novel nanocomposite filaments with enhanced properties that industry can benefit from, using commercially available materials, to enhance the performance of three-dimensional (3D) printed structures fabricated via fused fila...

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Autores principales: Vidakis, Nectarios, Petousis, Markos, Velidakis, Emanuel, Mountakis, Nikolaos, Tzounis, Lazaros, Liebscher, Marco, Grammatikos, Sotirios A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8071401/
https://www.ncbi.nlm.nih.gov/pubmed/33921005
http://dx.doi.org/10.3390/nano11041012
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author Vidakis, Nectarios
Petousis, Markos
Velidakis, Emanuel
Mountakis, Nikolaos
Tzounis, Lazaros
Liebscher, Marco
Grammatikos, Sotirios A.
author_facet Vidakis, Nectarios
Petousis, Markos
Velidakis, Emanuel
Mountakis, Nikolaos
Tzounis, Lazaros
Liebscher, Marco
Grammatikos, Sotirios A.
author_sort Vidakis, Nectarios
collection PubMed
description The scope of this work was to create, with melt mixing compounding process, novel nanocomposite filaments with enhanced properties that industry can benefit from, using commercially available materials, to enhance the performance of three-dimensional (3D) printed structures fabricated via fused filament fabrication (FFF) process. Silicon Dioxide (SiO(2)) nanoparticles (NPs) were selected as fillers for a polylactic acid (PLA) thermoplastic matrix at various weight % (wt.%) concentrations, namely, 0.5, 1.0, 2.0 and 4.0 wt.%. Tensile, flexural and impact test specimens were 3D printed and tested according to international standards and their Vickers microhardness was also examined. It was proven that SiO(2) filler enhanced the overall strength at concentrations up to 1 wt.%, compared to pure PLA. Atomic force microscopy (AFM) was employed to investigate the produced nanocomposite extruded filaments roughness. Raman spectroscopy was performed for the 3D printed nanocomposites to verify the polymer nanocomposite structure, while thermogravimetric analysis (TGA) revealed the 3D printed samples’ thermal stability. Scanning electron microscopy (SEM) was carried out for the interlayer fusion and fractography morphological characterization of the specimens. Finally, the antibacterial properties of the produced nanocomposites were investigated with a screening process, to evaluate their performance against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus).
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spelling pubmed-80714012021-04-26 Enhanced Mechanical, Thermal and Antimicrobial Properties of Additively Manufactured Polylactic Acid with Optimized Nano Silica Content Vidakis, Nectarios Petousis, Markos Velidakis, Emanuel Mountakis, Nikolaos Tzounis, Lazaros Liebscher, Marco Grammatikos, Sotirios A. Nanomaterials (Basel) Article The scope of this work was to create, with melt mixing compounding process, novel nanocomposite filaments with enhanced properties that industry can benefit from, using commercially available materials, to enhance the performance of three-dimensional (3D) printed structures fabricated via fused filament fabrication (FFF) process. Silicon Dioxide (SiO(2)) nanoparticles (NPs) were selected as fillers for a polylactic acid (PLA) thermoplastic matrix at various weight % (wt.%) concentrations, namely, 0.5, 1.0, 2.0 and 4.0 wt.%. Tensile, flexural and impact test specimens were 3D printed and tested according to international standards and their Vickers microhardness was also examined. It was proven that SiO(2) filler enhanced the overall strength at concentrations up to 1 wt.%, compared to pure PLA. Atomic force microscopy (AFM) was employed to investigate the produced nanocomposite extruded filaments roughness. Raman spectroscopy was performed for the 3D printed nanocomposites to verify the polymer nanocomposite structure, while thermogravimetric analysis (TGA) revealed the 3D printed samples’ thermal stability. Scanning electron microscopy (SEM) was carried out for the interlayer fusion and fractography morphological characterization of the specimens. Finally, the antibacterial properties of the produced nanocomposites were investigated with a screening process, to evaluate their performance against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). MDPI 2021-04-15 /pmc/articles/PMC8071401/ /pubmed/33921005 http://dx.doi.org/10.3390/nano11041012 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Vidakis, Nectarios
Petousis, Markos
Velidakis, Emanuel
Mountakis, Nikolaos
Tzounis, Lazaros
Liebscher, Marco
Grammatikos, Sotirios A.
Enhanced Mechanical, Thermal and Antimicrobial Properties of Additively Manufactured Polylactic Acid with Optimized Nano Silica Content
title Enhanced Mechanical, Thermal and Antimicrobial Properties of Additively Manufactured Polylactic Acid with Optimized Nano Silica Content
title_full Enhanced Mechanical, Thermal and Antimicrobial Properties of Additively Manufactured Polylactic Acid with Optimized Nano Silica Content
title_fullStr Enhanced Mechanical, Thermal and Antimicrobial Properties of Additively Manufactured Polylactic Acid with Optimized Nano Silica Content
title_full_unstemmed Enhanced Mechanical, Thermal and Antimicrobial Properties of Additively Manufactured Polylactic Acid with Optimized Nano Silica Content
title_short Enhanced Mechanical, Thermal and Antimicrobial Properties of Additively Manufactured Polylactic Acid with Optimized Nano Silica Content
title_sort enhanced mechanical, thermal and antimicrobial properties of additively manufactured polylactic acid with optimized nano silica content
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8071401/
https://www.ncbi.nlm.nih.gov/pubmed/33921005
http://dx.doi.org/10.3390/nano11041012
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