On the Tribological
Properties of Polylactide (Pla) Applied in 3d Printing
Technology

Pawlak, W.; Kowalewski, P.; Przekop, Robert E.

doi:10.5604/01.3001.0014.0848

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…Although ultra-high molecular weight polyethylene (UHMWPE) is primarily utilized in hip prostheses, HDPE exhibits much better processing properties even though it has slightly worse tribological properties. For this reason, HDPE remains a competitive material in this group of applications [ 2 , 3 , 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Structure and Mechanical Properties of High-Density Polyethylene Composites Reinforced with Glassy Carbon

et al. 2021

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In this paper, we investigated theimpact of glassy carbon (GC) reinforcement oncrystal structure and the mechanical performance of high-density polyethylene (HDPE). We made composite samples by mixing HDPE granules with powder in ethanol followed bymelt mixing in a laboratory extruder. Along with the investigated composite, we also prepared samples with carbon nanotubes (CNT), graphene (GNP) and graphite (Gr) to compare GC impact with already used carbon fillers. To evaluate crystal structure and crystallinity, we used X-ray diffraction (XRD) and differential scanning calorimetry (DSC). We supported the XRD results with a residual stress analysis (RSA) according to the EN15305 standard. Analysis showed that reinforcing with GC leads to significant crystallite size reduction and low residual stress values. We evaluated the mechanical properties of composites with hardness and tensile testing. The addition of glassy carbon results inincreased mechanical strength incomposites with CNT and GNP.

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Section: Introductionmentioning

confidence: 99%

Structure and Mechanical Properties of High-Density Polyethylene Composites Reinforced with Glassy Carbon

et al. 2021

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“…Research has also been conducted on 3D printed composites based on PLA, such as PLA/bronze composite [ 25 ], PLA/carbon black and PLA/alumina nanocomposites [ 26 ], and PLA/corn cob composite [ 27 ]. The authors of this article described their first trials of enriching a PLA matrix with MoS 2 additions in one their previous publications, which proved higher content (above 1%) to be negative on the desired properties of lower friction coefficient and wear [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Molybdenum Disulphide Modified Polylactide for 3D Printed (FDM/FFF) Filaments

et al. 2023

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MoS2 is an additive used to improve the tribological properties of plastics. In this work, it was decided to verify the use of MoS2 as a modifier of the properties of PLA filaments used in the additive FDM/FFF technique. For this purpose, MoS2 was introduced into the PLA matrix at concentrations of 0.025–1.0% by weight. Through extrusion, a fibre with a diameter of 1.75 mm was obtained. 3D printed samples with three different filling patterns were subjected to comprehensive thermal (TG, DSC and HDT), mechanical (impact, bending and strength tests), tribological and physicochemical characteristics. The mechanical properties were determined for two different types of fillings, and samples with the third type of filling were used for tribological tests. Tensile strength has been significantly increased for all samples with longitudinal filling with improvement up to 49%. In terms of tribological properties, higher values of the addition (0.5%) caused a significant increase of up to 457% of the wear indicator. A significant improvement in processing properties in terms of rheology was obtained (416% compared to pure PLA with the addition of 1.0%), which translated into more efficient processing, increased interlayer adhesion and mechanical strength. As a result, the quality of printed objects has been improved. Microscopic analysis was also carried out, which confirmed the good dispersion of the modifier in the polymer matrix (SEM-EDS). Microscopic techniques (MO, SEM) allowed for the characterization of the effect of the additive on changes in the printing process (improvement of interlayer remelting) and to assess impact fractures. In the tribological area, the introduced modification did not bring spectacular effects.

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“…However, papers analyzing the tribological properties of FDM 3D prints are appearing more frequently [20][21][22][23][24][25]. The influence of additives on the tribological properties of 3D prints has also been described [25][26][27][28]. Researchers have focused on the use of 3D prints in elements of machines.…”

Section: Introductionmentioning

confidence: 99%

Deposition of Biocompatible Polymers by 3D Printing (FDM) on Titanium Alloy

2022

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Nowadays, the replacement of a hip joint is a standard surgical procedure. However, researchers have continuingly been trying to upgrade endoprostheses and make them more similar to natural joints. The use of 3D printing could be helpful in such cases, since 3D-printed elements could mimic the natural lubrication mechanism of the meniscus. In this paper, we propose a method to deposit plastics directly on titanium alloy using 3D printing (FDM). This procedure allows one to obtain endoprostheses that are more similar to natural joints, easier to manufacture and have fewer components. During the research, biocompatible polymers suitable for 3D FDM printing were used, namely polylactide (PLA) and polyamide (PA). The research included tensile and shear tests of metal–polymer bonds, friction coefficient measurements and microscopic observations. The friction coefficient measurements revealed that only PA was promising for endoprostheses (the friction coefficient for PLA was too high). The strength tests and microscopic observations showed that PLA and PA deposition by 3D FDM printing directly on Ti6Al4V titanium alloy is possible; however, the achieved bonding strength and repeatability of the process were unsatisfactory. Nevertheless, the benefits arising from application of this method mean that it is worthwhile to continue working on this issue.

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On the Tribological Properties of Polylactide (Pla) Applied in 3d Printing Technology

Cited by 5 publications

References 4 publications

Structure and Mechanical Properties of High-Density Polyethylene Composites Reinforced with Glassy Carbon

Structure and Mechanical Properties of High-Density Polyethylene Composites Reinforced with Glassy Carbon

Molybdenum Disulphide Modified Polylactide for 3D Printed (FDM/FFF) Filaments

Deposition of Biocompatible Polymers by 3D Printing (FDM) on Titanium Alloy

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