Direct ink writing of geopolymer-based membranes with anisotropic structures for water treatment
In the present work, direct ink writing (DIW) technology was utilized to fabricate geopolymer-based anisotropic membranes from metakaolin precursors. For evaluation of filtration performance in water treatment, the 3D-printed membranes were characterized, tested systematically, compared with a molde...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/171192 |
| _version_ | 1811687812759552000 |
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| author | He, Zeming Hu, Chun Po Chen, Hui Chen, Xuelong Lim, Jacob Song Kiat Hu, Jingdan Hu, Xiao |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering He, Zeming Hu, Chun Po Chen, Hui Chen, Xuelong Lim, Jacob Song Kiat Hu, Jingdan Hu, Xiao |
| author_sort | He, Zeming |
| collection | NTU |
| description | In the present work, direct ink writing (DIW) technology was utilized to fabricate geopolymer-based anisotropic membranes from metakaolin precursors. For evaluation of filtration performance in water treatment, the 3D-printed membranes were characterized, tested systematically, compared with a molded membrane and benchmarked against other geopolymer and ceramic membranes reported in the literature. With a novel approach, geopolymer-yttria stabilized zirconia (YSZ) ultrafiltration (UF) membrane with configuration of relatively dense rejection layer and gradient macroporous support was obtained via a one-step process of alkaline activation, DIW and curing, starting from a computer aided design (CAD) figure of an isotropic solid plate. The achievement of such structure resulted from the printing procedure leveraging both rheological properties of geopolymer ink and printing principle of DIW. The printed membrane displayed very high permeances (1453 L/(m2hbar) for pure water and 1311 L/(m2hbar) for suspension of 80-nm alumina particles), high rejection efficiency (98.4% for suspension of 80-nm alumina particles) and good chemical stability in alkaline solution. The present work provided the first-time report on additive manufacturing of geopolymer-based asymmetric UF membranes with superb performance for water treatment. |
| first_indexed | 2024-10-01T05:22:16Z |
| format | Journal Article |
| id | ntu-10356/171192 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:22:16Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1711922023-10-17T02:35:39Z Direct ink writing of geopolymer-based membranes with anisotropic structures for water treatment He, Zeming Hu, Chun Po Chen, Hui Chen, Xuelong Lim, Jacob Song Kiat Hu, Jingdan Hu, Xiao School of Materials Science and Engineering Interdisciplinary Graduate School (IGS) Nanyang Environment and Water Research Institute Temasek Laboratories @ NTU Engineering::Materials Direct Ink Writing Geopolymer Membrane In the present work, direct ink writing (DIW) technology was utilized to fabricate geopolymer-based anisotropic membranes from metakaolin precursors. For evaluation of filtration performance in water treatment, the 3D-printed membranes were characterized, tested systematically, compared with a molded membrane and benchmarked against other geopolymer and ceramic membranes reported in the literature. With a novel approach, geopolymer-yttria stabilized zirconia (YSZ) ultrafiltration (UF) membrane with configuration of relatively dense rejection layer and gradient macroporous support was obtained via a one-step process of alkaline activation, DIW and curing, starting from a computer aided design (CAD) figure of an isotropic solid plate. The achievement of such structure resulted from the printing procedure leveraging both rheological properties of geopolymer ink and printing principle of DIW. The printed membrane displayed very high permeances (1453 L/(m2hbar) for pure water and 1311 L/(m2hbar) for suspension of 80-nm alumina particles), high rejection efficiency (98.4% for suspension of 80-nm alumina particles) and good chemical stability in alkaline solution. The present work provided the first-time report on additive manufacturing of geopolymer-based asymmetric UF membranes with superb performance for water treatment. National Research Foundation (NRF) Public Utilities Board (PUB) This research is supported by the National Research Foundation, Singapore, and PUB, Singapore’s National Water Agency under its RIE2025 Urban Solutions and Sustainability (USS) (Water) Centre of Excellence (CoE) Programme which provides funding to the Nanyang Environment & Water Research Institute (NEWRI) of the Nanyang Technological University, Singapore (NTU) . 2023-10-17T02:35:39Z 2023-10-17T02:35:39Z 2023 Journal Article He, Z., Hu, C. P., Chen, H., Chen, X., Lim, J. S. K., Hu, J. & Hu, X. (2023). Direct ink writing of geopolymer-based membranes with anisotropic structures for water treatment. Journal of Membrane Science, 685, 121953-. https://dx.doi.org/10.1016/j.memsci.2023.121953 0376-7388 https://hdl.handle.net/10356/171192 10.1016/j.memsci.2023.121953 2-s2.0-85166520633 685 121953 en Journal of Membrane Science © 2023 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Materials Direct Ink Writing Geopolymer Membrane He, Zeming Hu, Chun Po Chen, Hui Chen, Xuelong Lim, Jacob Song Kiat Hu, Jingdan Hu, Xiao Direct ink writing of geopolymer-based membranes with anisotropic structures for water treatment |
| title | Direct ink writing of geopolymer-based membranes with anisotropic structures for water treatment |
| title_full | Direct ink writing of geopolymer-based membranes with anisotropic structures for water treatment |
| title_fullStr | Direct ink writing of geopolymer-based membranes with anisotropic structures for water treatment |
| title_full_unstemmed | Direct ink writing of geopolymer-based membranes with anisotropic structures for water treatment |
| title_short | Direct ink writing of geopolymer-based membranes with anisotropic structures for water treatment |
| title_sort | direct ink writing of geopolymer based membranes with anisotropic structures for water treatment |
| topic | Engineering::Materials Direct Ink Writing Geopolymer Membrane |
| url | https://hdl.handle.net/10356/171192 |
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