<div class="csl-bib-body">
<div class="csl-entry">Theuer, T., Baumgartner, S., Koch, B., Liska, R., & Stampfl, J. (2023, May 4). <i>Digital Materials – Photopolymers with increased toughness</i> [Conference Presentation]. 7th European Symposium on Biomaterials and Related Areas BioMAT 2023, Weimar, Germany.</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/190822
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dc.description.abstract
Common Lithography based Additive Manufacturing Technologies (L-AMTs) are well known for their excellent Surface quality and precision as well as for their nearly unlimited freedom of design. However, in some cases L-AMTs are limited in thermomechanical properties of the final part material. This is of specific concern for photopolymers which typically exhibit rather low fracture toughness values. Therefore, a lot of effort is put into the development of new concepts for toughening of 3D printed materials and expand the field of industrial applications.
The opportunity of individually tailoring each segment or layer within the part allows the production of so-called digital materials, where each volume element (voxel) can carry different structural or functional material properties. This allows for mimicking toughening concepts which are used in biological materials like nacre or glass sponges where alternating soft and hard layers help to significantly increase the toughness of the final compound. [1, 2] Fratzl et al. figured out that an effective shielding effect can be observed if the difference in elastic moduli of soft and hard phase is a factor 5 or higher.[3]
By combining different L-AMTs, e.g. inkjet printing with digital light processing, such toughening concepts relying on hybrid materials can be realized. A digital light process unit (used wavelength λ = 375 nm, pixel size 50 μm) and an inkjet unit (λ = 455 nm, resolution 600 dpi) are utilized to produce bioinspired heterogenous materials. By printing the primary hard matrix material by a lithography-based AMT-printer and adding a soft ink as secondary material by an inkjet-printer, toughening of the digital material could be achieved. Tensile testing, stress relaxation and impact testing were performed to characterise thermomechanical properties. Furthermore, light, and scanning electron microscopy were utilized to assess properties of fractured samples and inkjet droplet quality. Assessed values agree with high performance polymers and printed digital materials reach an increase in tensile toughness of more than 60 %.
en
dc.language.iso
en
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dc.subject
dynamic digital light processing
en
dc.subject
inkjet
en
dc.subject
thiol-ene click chemistry
en
dc.subject
Hybrid Printing
en
dc.subject
heterogeneity
en
dc.subject
throughput enhancement
en
dc.subject
3D printing
en
dc.title
Digital Materials – Photopolymers with increased toughness
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.type.category
Conference Presentation
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tuw.researchinfrastructure
Pilotfabrik
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tuw.researchTopic.id
M2
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tuw.researchTopic.name
Materials Characterization
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tuw.researchTopic.value
100
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tuw.publication.orgunit
E308-02-2 - Forschungsgruppe Werkstoffe und Additive Fertigung
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tuw.publication.orgunit
E163-02-1 - Forschungsgruppe Polymerchemie und Technologie
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tuw.author.orcid
0000-0001-7954-4091
-
tuw.author.orcid
0000-0001-7865-1936
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tuw.author.orcid
0000-0002-3626-5647
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tuw.event.name
7th European Symposium on Biomaterials and Related Areas BioMAT 2023
en
tuw.event.startdate
03-05-2023
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tuw.event.enddate
04-05-2023
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tuw.event.online
Hybrid
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tuw.event.type
Event for scientific audience
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tuw.event.place
Weimar
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tuw.event.country
DE
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tuw.event.institution
DGM
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tuw.event.presenter
Theuer, Timon
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wb.sciencebranch
Maschinenbau
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wb.sciencebranch
Werkstofftechnik
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wb.sciencebranch.oefos
2030
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wb.sciencebranch.oefos
2050
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wb.sciencebranch.value
20
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wb.sciencebranch.value
80
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item.languageiso639-1
en
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item.openairetype
conference paper not in proceedings
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item.cerifentitytype
Publications
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item.grantfulltext
none
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item.fulltext
no Fulltext
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item.openairecristype
http://purl.org/coar/resource_type/c_18cp
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crisitem.author.dept
E308-02-2 - Forschungsgruppe Werkstoffe und Additive Fertigung
-
crisitem.author.dept
E308-02-2 - Forschungsgruppe Werkstoffe und Additive Fertigung
-
crisitem.author.dept
E308-02-2 - Forschungsgruppe Werkstoffe und Additive Fertigung
-
crisitem.author.dept
E163-02-1 - Forschungsgruppe Polymerchemie und Technologie
-
crisitem.author.dept
E308-02 - Forschungsbereich Polymer- und Verbundwerkstoffe
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crisitem.author.orcid
0000-0001-7954-4091
-
crisitem.author.orcid
0000-0001-7865-1936
-
crisitem.author.orcid
0000-0002-3626-5647
-
crisitem.author.parentorg
E308-02 - Forschungsbereich Polymer- und Verbundwerkstoffe
-
crisitem.author.parentorg
E308-02 - Forschungsbereich Polymer- und Verbundwerkstoffe
-
crisitem.author.parentorg
E308-02 - Forschungsbereich Polymer- und Verbundwerkstoffe