DLP 3D-Printed Mullite Ceramics for the Preparation of MOFs Functionalized Monoliths for CO<sub>2</sub> Capture
The aim of this work is to compare the traditional uniaxial pressing with an innovative shaping technique, Digital Light Processing (DLP), in the preparation of porous mullite (3Al<sub>2</sub>O<sub>3</sub>·2SiO<sub>2</sub>) supports to be functionalized with an ac...
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2024-11-01
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| Online Access: | https://www.mdpi.com/2571-6131/7/4/114 |
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| author | Arianna Bertero Bartolomeo Coppola Yurii Milovanov Paola Palmero Julien Schmitt Jean-Marc Tulliani |
| author_facet | Arianna Bertero Bartolomeo Coppola Yurii Milovanov Paola Palmero Julien Schmitt Jean-Marc Tulliani |
| author_sort | Arianna Bertero |
| collection | DOAJ |
| description | The aim of this work is to compare the traditional uniaxial pressing with an innovative shaping technique, Digital Light Processing (DLP), in the preparation of porous mullite (3Al<sub>2</sub>O<sub>3</sub>·2SiO<sub>2</sub>) supports to be functionalized with an active coating for CO<sub>2</sub> capture. Indeed, the fabrication of complex geometries with 3D-printing technologies allows the production of application-targeted solid sorbents with increased potentialities. Therefore, this research focused on the effect of the purity of the selected raw materials and of the microstructural porosity of 3D-printed ceramic substrates on the Metal Organic Frameworks (MOFs) coating efficiency. Two commercial mullite powders (Mc and Mf) differing in particle size distribution (D<sub>50</sub> of 9.19 µm and 4.38 µm, respectively) and iron oxide content (0.67% and 0.38%) were characterized and used to produce the substrates, after ball-milling and calcination. Mc and Mf slurries were prepared with 69 wt% of solid loading and 5 wt% of dispersant: both show rheological behavior suitable for DLP and good printability. DLP 3D-printed and pressed pellets were sintered at three different temperatures: 1350 °C, 1400 °C and 1450 °C. Mf 3D-printed samples show slightly lower geometrical and Archimedes densities, compared to Mc pellets, probably due to the presence of lower Fe<sub>2</sub>O<sub>3</sub> amounts and its effect as sintering aid. Mullite substrates were then successfully functionalized with HKUST-1 crystals by a two-step solvothermal synthesis process. Ceramic substrate porosity, depending on the shaping technique and opportunely tuned controlling the sintering temperature, was correlated with the functionalization efficiency in terms of MOFs deposition. Three-dimensional-printed substrates exhibit a higher and more homogeneous HKUST-1 uptake compared to the pressed pellets as DLP introduces desirable porosities able to enhance the functionalization. Therefore, this work provides preliminary guidelines to improve MOFs coating on mullite surfaces for CO<sub>2</sub> capture applications, by opportunely tuning the substrate porosity. |
| format | Article |
| id | doaj-art-7b417773f1d8428bbe8c24e2d5b3fae0 |
| institution | DOAJ |
| issn | 2571-6131 |
| language | English |
| publishDate | 2024-11-01 |
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| series | Ceramics |
| spelling | doaj-art-7b417773f1d8428bbe8c24e2d5b3fae02025-08-20T02:53:38ZengMDPI AGCeramics2571-61312024-11-01741810183510.3390/ceramics7040114DLP 3D-Printed Mullite Ceramics for the Preparation of MOFs Functionalized Monoliths for CO<sub>2</sub> CaptureArianna Bertero0Bartolomeo Coppola1Yurii Milovanov2Paola Palmero3Julien Schmitt4Jean-Marc Tulliani5Politecnico di Torino, Department of Applied Science and Technology, INSTM R.U. Lince, 10129 Torino, ItalyPolitecnico di Torino, Department of Applied Science and Technology, INSTM R.U. Lince, 10129 Torino, ItalyPolitecnico di Torino, Department of Applied Science and Technology, INSTM R.U. Lince, 10129 Torino, ItalyPolitecnico di Torino, Department of Applied Science and Technology, INSTM R.U. Lince, 10129 Torino, ItalyInstitut Charles Gerhardt, UMR 5253 Pôle Chimie Balard Recherche, 34293 Montpellier Cedex 5, FrancePolitecnico di Torino, Department of Applied Science and Technology, INSTM R.U. Lince, 10129 Torino, ItalyThe aim of this work is to compare the traditional uniaxial pressing with an innovative shaping technique, Digital Light Processing (DLP), in the preparation of porous mullite (3Al<sub>2</sub>O<sub>3</sub>·2SiO<sub>2</sub>) supports to be functionalized with an active coating for CO<sub>2</sub> capture. Indeed, the fabrication of complex geometries with 3D-printing technologies allows the production of application-targeted solid sorbents with increased potentialities. Therefore, this research focused on the effect of the purity of the selected raw materials and of the microstructural porosity of 3D-printed ceramic substrates on the Metal Organic Frameworks (MOFs) coating efficiency. Two commercial mullite powders (Mc and Mf) differing in particle size distribution (D<sub>50</sub> of 9.19 µm and 4.38 µm, respectively) and iron oxide content (0.67% and 0.38%) were characterized and used to produce the substrates, after ball-milling and calcination. Mc and Mf slurries were prepared with 69 wt% of solid loading and 5 wt% of dispersant: both show rheological behavior suitable for DLP and good printability. DLP 3D-printed and pressed pellets were sintered at three different temperatures: 1350 °C, 1400 °C and 1450 °C. Mf 3D-printed samples show slightly lower geometrical and Archimedes densities, compared to Mc pellets, probably due to the presence of lower Fe<sub>2</sub>O<sub>3</sub> amounts and its effect as sintering aid. Mullite substrates were then successfully functionalized with HKUST-1 crystals by a two-step solvothermal synthesis process. Ceramic substrate porosity, depending on the shaping technique and opportunely tuned controlling the sintering temperature, was correlated with the functionalization efficiency in terms of MOFs deposition. Three-dimensional-printed substrates exhibit a higher and more homogeneous HKUST-1 uptake compared to the pressed pellets as DLP introduces desirable porosities able to enhance the functionalization. Therefore, this work provides preliminary guidelines to improve MOFs coating on mullite surfaces for CO<sub>2</sub> capture applications, by opportunely tuning the substrate porosity.https://www.mdpi.com/2571-6131/7/4/114ceramics additive manufacturingdigital light processingCO<sub>2</sub> capturemetal organic frameworksmulliteporous ceramics |
| spellingShingle | Arianna Bertero Bartolomeo Coppola Yurii Milovanov Paola Palmero Julien Schmitt Jean-Marc Tulliani DLP 3D-Printed Mullite Ceramics for the Preparation of MOFs Functionalized Monoliths for CO<sub>2</sub> Capture Ceramics ceramics additive manufacturing digital light processing CO<sub>2</sub> capture metal organic frameworks mullite porous ceramics |
| title | DLP 3D-Printed Mullite Ceramics for the Preparation of MOFs Functionalized Monoliths for CO<sub>2</sub> Capture |
| title_full | DLP 3D-Printed Mullite Ceramics for the Preparation of MOFs Functionalized Monoliths for CO<sub>2</sub> Capture |
| title_fullStr | DLP 3D-Printed Mullite Ceramics for the Preparation of MOFs Functionalized Monoliths for CO<sub>2</sub> Capture |
| title_full_unstemmed | DLP 3D-Printed Mullite Ceramics for the Preparation of MOFs Functionalized Monoliths for CO<sub>2</sub> Capture |
| title_short | DLP 3D-Printed Mullite Ceramics for the Preparation of MOFs Functionalized Monoliths for CO<sub>2</sub> Capture |
| title_sort | dlp 3d printed mullite ceramics for the preparation of mofs functionalized monoliths for co sub 2 sub capture |
| topic | ceramics additive manufacturing digital light processing CO<sub>2</sub> capture metal organic frameworks mullite porous ceramics |
| url | https://www.mdpi.com/2571-6131/7/4/114 |
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