Biocompatible, 3D Printable Magnetic Soft Actuators – Ink Formulation, Rheological Characterization and Hydrogel Actuator Prototypes
Abstract 3D printable inks for the preparation of magnetic hydrogel actuators are difficult to formulate because magnetic nanoparticles tend to aggregate without stabilization through other ink components. At the same time, such inks need to be shear‐thinning and recover their high viscosity state s...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2024-03-01
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| Series: | Macromolecular Materials and Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/mame.202300322 |
| _version_ | 1797262294245179392 |
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| author | Fatih Puza Lukas Barth Marc‐Christopher Thiel Ralf Seemann Karen Lienkamp |
| author_facet | Fatih Puza Lukas Barth Marc‐Christopher Thiel Ralf Seemann Karen Lienkamp |
| author_sort | Fatih Puza |
| collection | DOAJ |
| description | Abstract 3D printable inks for the preparation of magnetic hydrogel actuators are difficult to formulate because magnetic nanoparticles tend to aggregate without stabilization through other ink components. At the same time, such inks need to be shear‐thinning and recover their high viscosity state sufficiently fast to be suitable for the printing process. Here, the use of chitosan as dispersing agent for Fe2O3 nanoparticles is reported. Combined with Pluronic F127 as a rheology modifier and acrylamide as the base monomer, thermoresponsive and shear‐thinning magnetic inks containing well‐dispersed particles are obtained. The ink viscosity is tuned over two orders of magnitude by varying the chitosan and Pluronics F127 content. 3D‐printed shapes with good shape fidelity are obtained at a print bed temperature of 50 °C, where aggregation of the Pluoronics F127 micelles occurs. This leads to a fast recovery of the high viscosity state of the material, so that the printed shape can then be locked in by UV cross‐linking. This treatment yielded magneto‐responsive prototypes which are promising for soft robotics applications. Thanks to the simplicity of the ink formulation, it is easily transferable also to nonspecialist laboratories, and the concept is potentially applicable also to other types of nanoparticles. |
| first_indexed | 2024-04-24T23:54:49Z |
| format | Article |
| id | doaj.art-2b317178d7b04dc99b0bc67135bb7dda |
| institution | Directory Open Access Journal |
| issn | 1438-7492 1439-2054 |
| language | English |
| last_indexed | 2024-04-24T23:54:49Z |
| publishDate | 2024-03-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Macromolecular Materials and Engineering |
| spelling | doaj.art-2b317178d7b04dc99b0bc67135bb7dda2024-03-14T13:40:38ZengWiley-VCHMacromolecular Materials and Engineering1438-74921439-20542024-03-013093n/an/a10.1002/mame.202300322Biocompatible, 3D Printable Magnetic Soft Actuators – Ink Formulation, Rheological Characterization and Hydrogel Actuator PrototypesFatih Puza0Lukas Barth1Marc‐Christopher Thiel2Ralf Seemann3Karen Lienkamp4Chair of Polymer Materials Department of Materials Science and Engineering Saarland University 66123 Saarbrücken GermanyChair of Polymer Materials Department of Materials Science and Engineering Saarland University 66123 Saarbrücken GermanyChair of Polymer Materials Department of Materials Science and Engineering Saarland University 66123 Saarbrücken GermanyChair of Geometry of Fluid Interfaces Department of Physics Saarland University 66123 Saarbrücken GermanyChair of Polymer Materials Department of Materials Science and Engineering Saarland University 66123 Saarbrücken GermanyAbstract 3D printable inks for the preparation of magnetic hydrogel actuators are difficult to formulate because magnetic nanoparticles tend to aggregate without stabilization through other ink components. At the same time, such inks need to be shear‐thinning and recover their high viscosity state sufficiently fast to be suitable for the printing process. Here, the use of chitosan as dispersing agent for Fe2O3 nanoparticles is reported. Combined with Pluronic F127 as a rheology modifier and acrylamide as the base monomer, thermoresponsive and shear‐thinning magnetic inks containing well‐dispersed particles are obtained. The ink viscosity is tuned over two orders of magnitude by varying the chitosan and Pluronics F127 content. 3D‐printed shapes with good shape fidelity are obtained at a print bed temperature of 50 °C, where aggregation of the Pluoronics F127 micelles occurs. This leads to a fast recovery of the high viscosity state of the material, so that the printed shape can then be locked in by UV cross‐linking. This treatment yielded magneto‐responsive prototypes which are promising for soft robotics applications. Thanks to the simplicity of the ink formulation, it is easily transferable also to nonspecialist laboratories, and the concept is potentially applicable also to other types of nanoparticles.https://doi.org/10.1002/mame.202300322actuatorshydrogelsmagnetic actuatorspolymerssoft robotics |
| spellingShingle | Fatih Puza Lukas Barth Marc‐Christopher Thiel Ralf Seemann Karen Lienkamp Biocompatible, 3D Printable Magnetic Soft Actuators – Ink Formulation, Rheological Characterization and Hydrogel Actuator Prototypes Macromolecular Materials and Engineering actuators hydrogels magnetic actuators polymers soft robotics |
| title | Biocompatible, 3D Printable Magnetic Soft Actuators – Ink Formulation, Rheological Characterization and Hydrogel Actuator Prototypes |
| title_full | Biocompatible, 3D Printable Magnetic Soft Actuators – Ink Formulation, Rheological Characterization and Hydrogel Actuator Prototypes |
| title_fullStr | Biocompatible, 3D Printable Magnetic Soft Actuators – Ink Formulation, Rheological Characterization and Hydrogel Actuator Prototypes |
| title_full_unstemmed | Biocompatible, 3D Printable Magnetic Soft Actuators – Ink Formulation, Rheological Characterization and Hydrogel Actuator Prototypes |
| title_short | Biocompatible, 3D Printable Magnetic Soft Actuators – Ink Formulation, Rheological Characterization and Hydrogel Actuator Prototypes |
| title_sort | biocompatible 3d printable magnetic soft actuators ink formulation rheological characterization and hydrogel actuator prototypes |
| topic | actuators hydrogels magnetic actuators polymers soft robotics |
| url | https://doi.org/10.1002/mame.202300322 |
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