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Influence of Solid Lubricants on the Tribological Performance of Photocurable Resins for Vat Photopolymerization

1
Faculty of Polymer Technology, Ozare 19, 2380 Slovenj Gradec, Slovenia
2
Polymer Competence Center Leoben GmbH, Roseggerstraße 12, 8700 Leoben, Austria
*
Author to whom correspondence should be addressed.
Lubricants 2020, 8(12), 104; https://doi.org/10.3390/lubricants8120104
Received: 3 November 2020 / Revised: 30 November 2020 / Accepted: 3 December 2020 / Published: 4 December 2020
New developments in additive manufacturing (AM) are enabling the use of 3D printed parts in increasingly demanding applications, such as in mechanical power transmission systems, where excellent build quality and tribological performance are required. The tribological properties of thermoplastic-based AM technologies are well knowninject, whereas the performance of photopolymer-based AM technologies is very rarely explored. This study aims to provide new insight into the tribological performance of 3D printed parts produced using vat photopolymerization (VPP). Photocurable resins based on aliphatic urethane acrylate oligomers were modified with different solid lubricants (polytetrafluoroethylene (PTFE), graphite and molybdenum disulfide (MoS2)) and 3D printed using Digital Light Processing (DLP). The mechanical and thermal properties were studied using the tensile tests, Charpy impact tests, Shore D, and dynamic mechanical analysis (DMA). The tribological performance was studied using a Pin-on-Disk tribometer. Among the lubricants, PTFE had the highest impact on the coefficient of friction (µ) and the specific wear rate (ws). The hybrid lubricant system (PTFE/MoS2) resulted in excellent tribological performance, where the µ was reduced by up to 52% and ws by up to 92%. View Full-Text
Keywords: additive manufacturing; vat photopolymerization; digital light processing; tribological properties; pin-on-disk additive manufacturing; vat photopolymerization; digital light processing; tribological properties; pin-on-disk
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MDPI and ACS Style

Slapnik, J.; Stiller, T.; Wilhelm, T.; Hausberger, A. Influence of Solid Lubricants on the Tribological Performance of Photocurable Resins for Vat Photopolymerization. Lubricants 2020, 8, 104. https://doi.org/10.3390/lubricants8120104

AMA Style

Slapnik J, Stiller T, Wilhelm T, Hausberger A. Influence of Solid Lubricants on the Tribological Performance of Photocurable Resins for Vat Photopolymerization. Lubricants. 2020; 8(12):104. https://doi.org/10.3390/lubricants8120104

Chicago/Turabian Style

Slapnik, Janez, Tanja Stiller, Thomas Wilhelm, and Andreas Hausberger. 2020. "Influence of Solid Lubricants on the Tribological Performance of Photocurable Resins for Vat Photopolymerization" Lubricants 8, no. 12: 104. https://doi.org/10.3390/lubricants8120104

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