Layer-by-layer aided β-cyclodextrin nanofilm for precise organic solvent nanofiltration
Synthetic interlayers with multiple functions and structural stability have a high potential to construct novel thin film composite (TFC) membranes with demanding permselective property for precise separations. Herein, a functional interlayer derived from the polyelectrolyte-based layer-by-layer (LB...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/161962 |
| _version_ | 1824453503373803520 |
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| author | Li, Xin Li, Can Goh, Kunli Chong, Tzyy Haur Wang, Rong |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Li, Xin Li, Can Goh, Kunli Chong, Tzyy Haur Wang, Rong |
| author_sort | Li, Xin |
| collection | NTU |
| description | Synthetic interlayers with multiple functions and structural stability have a high potential to construct novel thin film composite (TFC) membranes with demanding permselective property for precise separations. Herein, a functional interlayer derived from the polyelectrolyte-based layer-by-layer (LBL) self-assembly is reported to prepare interlayer engineered organic solvent nanofiltration (OSN) membranes using β-cyclodextrin (β-CD) as a monomer via interfacial polymerization (IP) process. Compared to the interlayer-free OSN membrane, a smoother selective layer with higher crosslinking degree is obtained for our developed membranes, enabling an improved organic dye rejection (e.g., 91.9% for methyl orange and 98.8% for brilliant blue R). Importantly, the LBL-aided β-CD nanofilm exhibits competitive permeances towards both polar (e.g., methanol, 5.8 LMH/bar) and nonpolar solvents (e.g., hexane, 7.0 LMH/bar). These performances can be attributed to the multiple roles of LBL-based interlayer as preventing the intrusion of selective layer and creating dual linkages (i.e., amide and ester), along with tailoring the physicochemical properties of caped β-CD nanofilm. Besides, the newly developed OSN membrane can discriminate between dye molecules with similar molecular weights and same charge but different molecular configurations. Meanwhile, its good structural integrity and long-term stability are also demonstrated by the 7-day filtration test using tetracycline in methanol and β-carotene in hexane, respectively, as evidence of constant solute rejections (≥90%) during the entire filtration process. This work unravels the functions of LBL-based interlayer in enhancing the OSN performance, offering new insights into shaping the development of interlayer engineered OSN membranes for real-life applications. |
| first_indexed | 2025-02-19T03:07:27Z |
| format | Journal Article |
| id | ntu-10356/161962 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:07:27Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1619622022-09-27T07:24:49Z Layer-by-layer aided β-cyclodextrin nanofilm for precise organic solvent nanofiltration Li, Xin Li, Can Goh, Kunli Chong, Tzyy Haur Wang, Rong School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Engineering::Environmental engineering Interlayer Organic Solvent Nanofiltration Synthetic interlayers with multiple functions and structural stability have a high potential to construct novel thin film composite (TFC) membranes with demanding permselective property for precise separations. Herein, a functional interlayer derived from the polyelectrolyte-based layer-by-layer (LBL) self-assembly is reported to prepare interlayer engineered organic solvent nanofiltration (OSN) membranes using β-cyclodextrin (β-CD) as a monomer via interfacial polymerization (IP) process. Compared to the interlayer-free OSN membrane, a smoother selective layer with higher crosslinking degree is obtained for our developed membranes, enabling an improved organic dye rejection (e.g., 91.9% for methyl orange and 98.8% for brilliant blue R). Importantly, the LBL-aided β-CD nanofilm exhibits competitive permeances towards both polar (e.g., methanol, 5.8 LMH/bar) and nonpolar solvents (e.g., hexane, 7.0 LMH/bar). These performances can be attributed to the multiple roles of LBL-based interlayer as preventing the intrusion of selective layer and creating dual linkages (i.e., amide and ester), along with tailoring the physicochemical properties of caped β-CD nanofilm. Besides, the newly developed OSN membrane can discriminate between dye molecules with similar molecular weights and same charge but different molecular configurations. Meanwhile, its good structural integrity and long-term stability are also demonstrated by the 7-day filtration test using tetracycline in methanol and β-carotene in hexane, respectively, as evidence of constant solute rejections (≥90%) during the entire filtration process. This work unravels the functions of LBL-based interlayer in enhancing the OSN performance, offering new insights into shaping the development of interlayer engineered OSN membranes for real-life applications. Economic Development Board (EDB) National Research Foundation (NRF) Public Utilities Board (PUB) This research grant was supported by the Singapore National Research Foundation under its Urban Solutions & Sustainability and administered by PUB, Singapore’s National Water Agency (1601-CRPW-T49 (IDD 90301/01/81)). We acknowledge funding support from Singapore Economic Development Board, Singapore, to the Singapore Membrane Technology Centre, Singapore. 2022-09-27T07:24:49Z 2022-09-27T07:24:49Z 2022 Journal Article Li, X., Li, C., Goh, K., Chong, T. H. & Wang, R. (2022). Layer-by-layer aided β-cyclodextrin nanofilm for precise organic solvent nanofiltration. Journal of Membrane Science, 652, 120466-. https://dx.doi.org/10.1016/j.memsci.2022.120466 0376-7388 https://hdl.handle.net/10356/161962 10.1016/j.memsci.2022.120466 2-s2.0-85126943657 652 120466 en 1601-CRPW-T49 (IDD 90301/01/81) Journal of Membrane Science © 2022 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Interlayer Organic Solvent Nanofiltration Li, Xin Li, Can Goh, Kunli Chong, Tzyy Haur Wang, Rong Layer-by-layer aided β-cyclodextrin nanofilm for precise organic solvent nanofiltration |
| title | Layer-by-layer aided β-cyclodextrin nanofilm for precise organic solvent nanofiltration |
| title_full | Layer-by-layer aided β-cyclodextrin nanofilm for precise organic solvent nanofiltration |
| title_fullStr | Layer-by-layer aided β-cyclodextrin nanofilm for precise organic solvent nanofiltration |
| title_full_unstemmed | Layer-by-layer aided β-cyclodextrin nanofilm for precise organic solvent nanofiltration |
| title_short | Layer-by-layer aided β-cyclodextrin nanofilm for precise organic solvent nanofiltration |
| title_sort | layer by layer aided β cyclodextrin nanofilm for precise organic solvent nanofiltration |
| topic | Engineering::Environmental engineering Interlayer Organic Solvent Nanofiltration |
| url | https://hdl.handle.net/10356/161962 |
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