| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Hambitzer, Leonhard Roland
University of Freiburg
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2024Two‐Photon Polymerization of Nanocomposites for Additive Manufacturing of Transparent Magnesium Aluminate Spinel Ceramicscitations
- 2024Decolorization of Lignin for High‐Resolution 3D Printing of High Lignin‐Content Compositescitations
- 2024Sub‐micron replication of fused silica glass and amorphous metals for tool‐based manufacturingcitations
- 2024High‐resolution structuring of silica‐based nanocomposites for the fabrication of transparent multicomponent glasses with adjustable propertiescitations
- 2022Injection Molding of Magnesium Aluminate Spinel Nanocomposites for High‐Throughput Manufacturing of Transparent Ceramicscitations
- 2022Replicative manufacturing of metal moulds for low surface roughness polymer replicationcitations
- 2021Melt‐Extrusion‐Based Additive Manufacturing of Transparent Fused Silica Glasscitations
Places of action
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article
Decolorization of Lignin for High‐Resolution 3D Printing of High Lignin‐Content Composites
Abstract
<jats:title>Abstract</jats:title><jats:p>Lignin, one of the most abundant biomaterials and a large‐scale industrial waste product, is a promising filler for polymers as it reduces the amount of fossil resources and is readily available. 3D printing is well‐known for producing detailed polymer structures in small sizes at low waste production. Especially light‐assisted 3D printing is a powerful technique for production of high‐resolution structures. However, lignin acts as a very efficient absorber for UV and visible light limiting the printability of lignin composites, reducing its potential as a high‐volume filler. In this work, the decolorization of lignin is presented for high‐resolution 3D printing of biocomposites with lignin content up to 40 wt.%. Organosolv lignin (OSL) is decolorized by an optimized low‐energy process of acetylation and subsequent UV irradiation reducing the UV absorbance by 71%. By integration of decolorized lignin into bio‐based tetrahydrofurfuryl acrylate (THFA), a lignin content of 40 wt.% and a resolution of 250 µm is achieved. Due to the reinforcing properties of lignin, the stiffness and strength of the material is increased by factors of 15 and 2.3, respectively. This work paves the way for the re‐use of a large amount of lignin waste for 3D printing of tough materials at high resolution.</jats:p>