TY  - JOUR
A1  - Hoffmann, Lauri
A1  - Gallace, Bruno
A1  - Herr, Clara
A1  - Scherer, Kai
A1  - Huwer, Adrian
A1  - Kampeis, Percy
A1  - Ulber, Roland
A1  - Wahl, Michael
T1  - Impact of Autoclaving on the Material Properties of Vat-Photopolymerization-Produced Components Intended for Bioprocess Engineering
T2  - Materials
N2  - Due to a lack of investigated materials for the additive manufacturing of multi-use functional parts in bioprocess engineering, this study aimed to evaluate the influence of multiple autoclaving cycles on the properties of a heat-resistant material (xPeek147) printed with vat photopolymerization. Sample bodies were tested regarding their mechanical properties of tensile strength, elongation at break, and Charpy impact, as well as surface properties of roughness and wettability after up to 50 autoclaving cycles (121 °C, 2 bars, 15 min). The tightness was checked after up to 20 cycles, and accuracy was inspected for manufactured benchmark bodies after up to 10 autoclaving cycles. The reported results showed no significant changes in tensile strength, elongation at break and Charpy impact after 20 cycles, but a significant decrease after 50 autoclaving cycles, accompanied by microcracks in the structure. Regarding the surface properties the material retained its hydrophilicity, and the surface roughness was not affected significantly. No changes in tightness occurred, and the benchmark bodies for dimensional changes showed no process-relevant deviations. Through the investigations, a material for the additive manufacturing of multi-use functional parts for bioprocess engineering was identified. Additionally, a testing method for materials with the same intended application was provided.
KW  - additive manufacturing
KW  - stereolithography
KW  - steam sterilization
KW  - mechanical properties
KW  - surface properties
KW  - autoclavable
KW  - vat photopolymerization
KW  - Rapid Prototyping <Fertigung>
KW  - Stereolithographie
KW  - 3D-Druck
KW  - Autoklav
KW  - Zyklus
KW  - Stoffeigenschaft
KW  - Mechanische Eigenschaft
KW  - Oberflächeneigenschaft
KW  - Zugfestigkeit
KW  - Dehnung
KW  - Schlagfestigkeit
KW  - Rauigkeit
KW  - Benetzung
Y1  - 2026
UR  - https://hst.opus.hbz-nrw.de/frontdoor/index/index/docId/1103
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:tr5-11032
VL  - 18
IS  - 20
SP  - 1
EP  - 18
PB  - MDPI
ER  -