Approaching Standardization: Mechanical Material Testing of Macroscopic Two‐Photon Polymerized Specimens
Advanced Materials, vol. 36, pp. e2308497
Abstract
Two-photon polymerization (2PP) is becoming increasingly established as additive manufacturing technology for microfabrication due to its high-resolution and the feasibility of generating complex parts. Until now, the high resolution of 2PP is also its bottleneck, as it limited throughput and therefore restricted the application to the production of microparts. Thus, mechanical properties of 2PP materials can only be characterized using nonstandardized specialized microtesting methods. Due to recent advances in 2PP technology, it is now possible to produce parts in the size of several millimeters to even centimeters, finally permitting the fabrication of macrosized testing specimens. Besides suitable hardware systems, 2PP materials exhibiting favorable mechanical properties that allow printing of up-scaled parts are strongly demanded. In this work, the up-scalability of three different photopolymers is investigated using a high-throughput 2PP system and low numerical aperture optics. Testing specimens in the cm-range are produced and tested with common or even standardized material testing methods available in conventionally equipped polymer testing labs. Examples of the characterization of mechanical, thermo-mechanical, and fracture properties of 2PP processed materials are shown. Additionally, aspects such as postprocessing and aging are investigated. This lays a foundation for future expansion of the 2PP technology to broader industrial application.
Authors 10
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Affiliation as printed
Institute of Materials Science and Technology TU Wien Vienna 1060 Austria
Institute of Materials Science and Technology, TU Wien, Vienna, 1060 Austria
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California Institute of Technology
Affiliation as printed
Division of Engineering and Applied Sciences California Institute of Technology Pasadena CA 91125 USA
Division of Engineering and Applied Sciences, California Institute of Technology, Pasadena, CA, 91125 USA
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California Institute of Technology
Affiliation as printed
Division of Engineering and Applied Sciences California Institute of Technology Pasadena CA 91125 USA
Division of Engineering and Applied Sciences, California Institute of Technology, Pasadena, CA, 91125 USA
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California Institute of Technology
Affiliation as printed
Division of Engineering and Applied Sciences California Institute of Technology Pasadena CA 91125 USA
Division of Engineering and Applied Sciences, California Institute of Technology, Pasadena, CA, 91125 USA
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Affiliation as printed
Central Facility for Electron Microscopy RWTH Aachen 52074 Aachen Germany
Central Facility for Electron Microscopy, RWTH Aachen, 52074 Aachen, Germany
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Affiliation as printed
Institute of Materials Science and Technology TU Wien Vienna 1060 Austria
Institute of Materials Science and Technology, TU Wien, Vienna, 1060 Austria
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California Institute of Technology · Kavli Nanoscience Institute
Affiliation as printed
Division of Engineering and Applied Sciences California Institute of Technology Pasadena CA 91125 USA
Kavli Nanoscience Institute California Institute of Technology Pasadena CA 91125 USA
Division of Engineering and Applied Sciences, California Institute of Technology, Pasadena, CA, 91125 USA
Kavli Nanoscience Institute, California Institute of Technology, Pasadena, CA, 91125 USA
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Aleksandr Ovsianikov corresponding
Affiliation as printed
Institute of Materials Science and Technology TU Wien Vienna 1060 Austria
Institute of Materials Science and Technology, TU Wien, Vienna, 1060 Austria
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Affiliation as printed
Institute of Materials Science and Technology TU Wien Vienna 1060 Austria
Institute of Materials Science and Technology, TU Wien, Vienna, 1060 Austria
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Affiliation as printed
UpNano GmbH Vienna 1030 Austria
UpNano GmbH, Vienna, 1030 Austria
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