Parametric optimization of intra- and inter-layer strengths in parts produced by extrusion-based additive manufacturing of poly(lactic acid)

2017 ◽  
Vol 134 (41) ◽  
pp. 45401 ◽  
Author(s):  
Martin Spoerk ◽  
Florian Arbeiter ◽  
Hrvoje Cajner ◽  
Janak Sapkota ◽  
Clemens Holzer
Keyword(s):  
Lactic Acid ◽  
Additive Manufacturing ◽  
Parametric Optimization ◽  
Poly Lactic Acid

scholarly journals Additive manufacturing with composites of poly lactic acid (PLA)

2021 ◽  
Vol 2027 (1) ◽  
pp. 012008
Author(s):  
R Kishore ◽  
M Vinayaga Moorthy ◽  
P.S Gokul ◽  
Mugilan ◽  
Mugundhan
Keyword(s):  
Lactic Acid ◽  
Additive Manufacturing ◽  
Poly Lactic Acid

Additive manufacturing of green composites: Poly (lactic acid) reinforced with keratin materials obtained from Angora rabbit hair

2020 ◽  
pp. 50321
Author(s):  
Cynthia Graciela Flores‐Hernandez ◽  
Carlos Velasco‐Santos ◽  
José Luis Rivera‐Armenta ◽  
Oscar Gomez‐Guzman ◽  
José Martin Yañez‐Limon ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Additive Manufacturing ◽  
Poly Lactic Acid ◽  
Green Composites ◽  
Angora Rabbit

scholarly journals ANALISIS PENGARUH INFILL OVERLAP TERHADAP KARAKTERISTIK PRODUK HASIL 3D PRINTING DENGAN MENGGUNAKAN MATERIAL POLY LACTIC ACID (PLA)

2019 ◽  
Vol 18 (2) ◽  
Author(s):  
Fajri Sri Ardion ◽  
Heru Sukanto ◽  
Joko Triyono
Keyword(s):  
Lactic Acid ◽  
Additive Manufacturing ◽  
3D Printing ◽  
Fused Deposition Modeling ◽  
Corn Starch ◽  
Nozzle Diameter ◽  
Bending Test ◽  
Poly Lactic Acid ◽  
Fused Deposition ◽  
Bed Temperature

<div class="WordSection1"><p><em>Rapid prototyping or commonly known as additive manufacturing uses metal and non-metal semi-liquid materials which are compacted layer by layer. Fused deposition modeling (FDM) is one of the methods in the additive manufacturing process that u</em><em>ses</em><em> thermoplastic filaments (PLA and ABS). Poly Lactic Acid (PLA) or poly lactic acid is an organic</em><em> plastic</em><em> or bioplastic made from renewable biomass sources such as corn starch, pea starch and vegetable oils. Important factors affecting the quality of 3D Printing results are nozzle diameter, nozzle temperature, bed temperature, infill patern, </em><em>infill percentage</em><em>, print speed, layer thickness and </em><em>infill overlap</em><em>. </em><em>Infill overlap</em><em> is the percentage of overlapping processes of the filament during the printing process. This research was conducted to determine the effect of </em><em>infill overlap</em><em>on the physical and mechanical properties of 3d printing products. The </em><em>infill overlap</em><em>variations used are 0%, 25%, 50%, and 75% of the nozzle diameter. 50% variation shows better quality when compared to other variations for density test, tensile test, and bending test.</em><em></em></p></div><em><br clear="all" /></em>

scholarly journals Material Extrusion-Based Additive Manufacturing of Poly(Lactic Acid) Antibacterial Filaments—A Case Study of Antimicrobial Properties

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4337
Author(s):  
Piotr Gruber ◽  
Viktoria Hoppe ◽  
Emilia Grochowska ◽  
Justyna Paleczny ◽  
Adam Junka ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Additive Manufacturing ◽  
Methodological Approach ◽  
Antibacterial Properties ◽  
Antimicrobial Properties ◽  
Sem Analysis ◽  
Poly Lactic Acid ◽  
Fused Filament Fabrication ◽  
Personal Protection Equipment ◽  
Specific Species

In the era of the coronavirus pandemic, one of the most demanding areas was the supply of healthcare systems in essential Personal Protection Equipment (PPE), including face-shields and hands-free door openers. This need, impossible to fill by traditional manufacturing methods, was met by implementing of such emerging technologies as additive manufacturing (AM/3D printing). In this article, Poly(lactic acid) (PLA) filaments for Fused filament fabrication (FFF) technology in the context of the antibacterial properties of finished products were analyzed. The methodology included 2D radiography and scanning electron microscopy (SEM) analysis to determine the presence of antimicrobial additives in the material and their impact on such hospital pathogens as Staphylococcus aureus, Pseudomonas aeruginosa, and Clostridium difficile. The results show that not all tested materials displayed the expected antimicrobial properties after processing in FFF technology. The results showed that in the case of specific species of bacteria, the FFF samples, produced using the declared antibacterial materials, may even stimulate the microbial growth. The novelty of the results relies on methodological approach exceeding scope of ISO 22196 standard and is based on tests with three different species of bacteria in two types of media simulating common body fluids that can be found on frequently touched, nosocomial surfaces. The data presented in this article is of pivotal meaning taking under consideration the increasing interest in application of such products in the clinical setting.

Annealing and crystallization kinetics of poly(lactic acid) pieces obtained by additive manufacturing

2021 ◽  
Author(s):  
Iago Augusto Reis ◽  
Pedro Ivo Cunha Claro ◽  
Andre Luis Marcomini ◽  
Luiz Henrique Capparelli Mattoso ◽  
Sandro Pereira Silva ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Additive Manufacturing ◽  
Crystallization Kinetics ◽  
Poly Lactic Acid ◽  
Kinetics Of

scholarly journals Improving Mechanical Properties for Extrusion-Based Additive Manufacturing of Poly(Lactic Acid) by Annealing and Blending with Poly(3-Hydroxybutyrate)

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1529 ◽  
Author(s):  
Sisi Wang ◽  
Lode Daelemans ◽  
Rudinei Fiorio ◽  
Maling Gou ◽  
Dagmar R. D’hooge ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Additive Manufacturing ◽  
Mechanical Performance ◽  
Softening Temperature ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Poly Lactic Acid ◽  
Second Phase ◽  
X Ray Diffraction ◽  
Scanning Calorimetry

Based on differential scanning calorimetry (DSC), X-ray diffraction (XRD) analysis, polarizing microscope (POM), and scanning electron microscopy (SEM) analysis, strategies to close the gap on applying conventional processing optimizations for the field of 3D printing and to specifically increase the mechanical performance of extrusion-based additive manufacturing of poly(lactic acid) (PLA) filaments by annealing and/or blending with poly(3-hydroxybutyrate) (PHB) were reported. For filament printing at 210 °C, the PLA crystallinity increased significantly upon annealing. Specifically, for 2 h of annealing at 100 °C, the fracture surface became sufficiently coarse such that the PLA notched impact strength increased significantly (15 kJ m−2). The Vicat softening temperature (VST) increased to 160 °C, starting from an annealing time of 0.5 h. Similar increases in VST were obtained by blending with PHB (20 wt.%) at a lower printing temperature of 190 °C due to crystallization control. For the blend, the strain at break increased due to the presence of a second phase, with annealing only relevant for enhancing the modulus.

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