Fabrication of 3D-printed hygromorphs based on different cellulosic fillers
Abstract The aim of this work is to characterize the moisture-dependent actuation behavior of bioinspired and additively manufactured hygromorphs based by following deductive and inductive design approaches. Fused Filament Fabrication (FFF) is employed to print bilayered structures consisting of swe...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2021-01-01
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| Series: | Functional Composite Materials |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s42252-020-00014-w |
| _version_ | 1818557192829140992 |
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| author | Matthias Langhansl Jörg Dörrstein Peter Hornberger Cordt Zollfrank |
| author_facet | Matthias Langhansl Jörg Dörrstein Peter Hornberger Cordt Zollfrank |
| author_sort | Matthias Langhansl |
| collection | DOAJ |
| description | Abstract The aim of this work is to characterize the moisture-dependent actuation behavior of bioinspired and additively manufactured hygromorphs based by following deductive and inductive design approaches. Fused Filament Fabrication (FFF) is employed to print bilayered structures consisting of swellable active layers and rigid passive layers. The active layer is composed of a polylactic acid (PLA) matrix filled with different hygroscopic cellulosic materials (native and modified) up to a filler content of 50 m%. Acrylonitrile Butadiene Styrene (ABS) is used for the passive layer. The FFF process allows the generation of desired differential swelling properties in the composites upon moisture absorption. The moisture dependent actuation strain of the printed bilayers was determined by video analyses. Some influencing geometrical factors which contribute to the actuation were deduced from x-ray diffraction (XRD) and micro computed tomography (μCT). The investigation of the mean cellulose microfibril orientation on the surface of the active layer suggested a preferential orientation with respect to printing direction. Furthermore, a gradient of cellulosic material within a single printed layer was observed, which indicates fiber sedimentation. Comparison with the thermomechanical model derived from Timoshenko (1925) shows that the computational prediction of the moisture dependent actuation is considerably accurate for most selected cellulosic materials and filler contents. |
| first_indexed | 2024-12-13T23:56:41Z |
| format | Article |
| id | doaj.art-d863bf9400a8452c947551186142eb67 |
| institution | Directory Open Access Journal |
| issn | 2522-5774 |
| language | English |
| last_indexed | 2024-12-13T23:56:41Z |
| publishDate | 2021-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Functional Composite Materials |
| spelling | doaj.art-d863bf9400a8452c947551186142eb672022-12-21T23:26:31ZengSpringerOpenFunctional Composite Materials2522-57742021-01-01211810.1186/s42252-020-00014-wFabrication of 3D-printed hygromorphs based on different cellulosic fillersMatthias Langhansl0Jörg Dörrstein1Peter Hornberger2Cordt Zollfrank3TUM Campus Straubing for Biotechnology and Sustainability, Biogenic PolymersTUM Campus Straubing for Biotechnology and Sustainability, Biogenic PolymersApplication Center for CT in Metrology, Fraunhofer Institute for Integrated Circuits, IISTUM Campus Straubing for Biotechnology and Sustainability, Biogenic PolymersAbstract The aim of this work is to characterize the moisture-dependent actuation behavior of bioinspired and additively manufactured hygromorphs based by following deductive and inductive design approaches. Fused Filament Fabrication (FFF) is employed to print bilayered structures consisting of swellable active layers and rigid passive layers. The active layer is composed of a polylactic acid (PLA) matrix filled with different hygroscopic cellulosic materials (native and modified) up to a filler content of 50 m%. Acrylonitrile Butadiene Styrene (ABS) is used for the passive layer. The FFF process allows the generation of desired differential swelling properties in the composites upon moisture absorption. The moisture dependent actuation strain of the printed bilayers was determined by video analyses. Some influencing geometrical factors which contribute to the actuation were deduced from x-ray diffraction (XRD) and micro computed tomography (μCT). The investigation of the mean cellulose microfibril orientation on the surface of the active layer suggested a preferential orientation with respect to printing direction. Furthermore, a gradient of cellulosic material within a single printed layer was observed, which indicates fiber sedimentation. Comparison with the thermomechanical model derived from Timoshenko (1925) shows that the computational prediction of the moisture dependent actuation is considerably accurate for most selected cellulosic materials and filler contents.https://doi.org/10.1186/s42252-020-00014-w3D printingActuationBilayerAnisotropic swellingCelluloseMicrocrystalline cellulose |
| spellingShingle | Matthias Langhansl Jörg Dörrstein Peter Hornberger Cordt Zollfrank Fabrication of 3D-printed hygromorphs based on different cellulosic fillers Functional Composite Materials 3D printing Actuation Bilayer Anisotropic swelling Cellulose Microcrystalline cellulose |
| title | Fabrication of 3D-printed hygromorphs based on different cellulosic fillers |
| title_full | Fabrication of 3D-printed hygromorphs based on different cellulosic fillers |
| title_fullStr | Fabrication of 3D-printed hygromorphs based on different cellulosic fillers |
| title_full_unstemmed | Fabrication of 3D-printed hygromorphs based on different cellulosic fillers |
| title_short | Fabrication of 3D-printed hygromorphs based on different cellulosic fillers |
| title_sort | fabrication of 3d printed hygromorphs based on different cellulosic fillers |
| topic | 3D printing Actuation Bilayer Anisotropic swelling Cellulose Microcrystalline cellulose |
| url | https://doi.org/10.1186/s42252-020-00014-w |
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