Fine-tuning selective layer architecture of hydrogel membrane towards high separation performances for engineered osmosis
Ultrathin and/or ultrasmooth selective layer is one of the paramount goals in membrane realm for maximizing separation efficiency and/or minimizing fouling tendency. Towards this goal, the architecture of hydrogel selective layer is finely tuned for the first time for improving engineered osmosis (E...
| Main Authors: | , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/139711 |
| _version_ | 1824453938418548736 |
|---|---|
| author | Qin, Detao Liu, Zhaoyang Bai, Hongwei Song, Xiaoxiao Li, Zhengtao Sun, Darren Delai |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Qin, Detao Liu, Zhaoyang Bai, Hongwei Song, Xiaoxiao Li, Zhengtao Sun, Darren Delai |
| author_sort | Qin, Detao |
| collection | NTU |
| description | Ultrathin and/or ultrasmooth selective layer is one of the paramount goals in membrane realm for maximizing separation efficiency and/or minimizing fouling tendency. Towards this goal, the architecture of hydrogel selective layer is finely tuned for the first time for improving engineered osmosis (EO) membrane performance. Through delicately controlling synthesis parameters, ultrathin selective layer as thin as 30 nm, and ultrasmooth selective layer with sub-1 nm roughness (the smoothest EO membrane in literature) are successfully synthesized respectively. Analysis of reverse osmosis (RO) experimental results reveals hydrogel layer resistance to water permeation is linearly reduced by 1.40 × 1013 m−1 as the layer is tailored thinner per 10 nm, which leads to the remarkable enhancement of water permeability by ~10 times from 0.49 L m−2 h−1 bar−1 of 500 nm thickness to 4.75 L m−2 h−1 bar−1 of 30 nm thickness. Pressure-retarded osmosis (PRO) and forward osmosis (FO) tests indicate 45-nm-thick hydrogel layer achieves the maximum separation efficiency in terms of specific water flux (JW/JS). Moreover, the mechanism for tuning hydrogel layer architecture is discussed on the basis of microscopic characterizations. This study sheds new light on ultrathin and ultrasmooth selective layer for promoting EO membrane to smartly tackle different kinds of wastewater. |
| first_indexed | 2025-02-19T03:14:22Z |
| format | Journal Article |
| id | ntu-10356/139711 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:14:22Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1397112021-01-08T02:43:33Z Fine-tuning selective layer architecture of hydrogel membrane towards high separation performances for engineered osmosis Qin, Detao Liu, Zhaoyang Bai, Hongwei Song, Xiaoxiao Li, Zhengtao Sun, Darren Delai School of Civil and Environmental Engineering Interdisciplinary Graduate School (IGS) Energy Research Institute @ NTU (ERI@N) Engineering::Civil engineering Engineered Osmosis Hydrogel Membrane Ultrathin and/or ultrasmooth selective layer is one of the paramount goals in membrane realm for maximizing separation efficiency and/or minimizing fouling tendency. Towards this goal, the architecture of hydrogel selective layer is finely tuned for the first time for improving engineered osmosis (EO) membrane performance. Through delicately controlling synthesis parameters, ultrathin selective layer as thin as 30 nm, and ultrasmooth selective layer with sub-1 nm roughness (the smoothest EO membrane in literature) are successfully synthesized respectively. Analysis of reverse osmosis (RO) experimental results reveals hydrogel layer resistance to water permeation is linearly reduced by 1.40 × 1013 m−1 as the layer is tailored thinner per 10 nm, which leads to the remarkable enhancement of water permeability by ~10 times from 0.49 L m−2 h−1 bar−1 of 500 nm thickness to 4.75 L m−2 h−1 bar−1 of 30 nm thickness. Pressure-retarded osmosis (PRO) and forward osmosis (FO) tests indicate 45-nm-thick hydrogel layer achieves the maximum separation efficiency in terms of specific water flux (JW/JS). Moreover, the mechanism for tuning hydrogel layer architecture is discussed on the basis of microscopic characterizations. This study sheds new light on ultrathin and ultrasmooth selective layer for promoting EO membrane to smartly tackle different kinds of wastewater. 2020-05-21T04:19:39Z 2020-05-21T04:19:39Z 2019 Journal Article Qin, D., Liu, Z., Bai, H., Song, X., Li, Z., & Sun, D. D. (2019). Fine-tuning selective layer architecture of hydrogel membrane towards high separation performances for engineered osmosis. Journal of Membrane Science, 592, 117370-. doi:10.1016/j.memsci.2019.117370 0376-7388 https://hdl.handle.net/10356/139711 10.1016/j.memsci.2019.117370 2-s2.0-85070723537 592 en Journal of Membrane Science © 2019 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Engineered Osmosis Hydrogel Membrane Qin, Detao Liu, Zhaoyang Bai, Hongwei Song, Xiaoxiao Li, Zhengtao Sun, Darren Delai Fine-tuning selective layer architecture of hydrogel membrane towards high separation performances for engineered osmosis |
| title | Fine-tuning selective layer architecture of hydrogel membrane towards high separation performances for engineered osmosis |
| title_full | Fine-tuning selective layer architecture of hydrogel membrane towards high separation performances for engineered osmosis |
| title_fullStr | Fine-tuning selective layer architecture of hydrogel membrane towards high separation performances for engineered osmosis |
| title_full_unstemmed | Fine-tuning selective layer architecture of hydrogel membrane towards high separation performances for engineered osmosis |
| title_short | Fine-tuning selective layer architecture of hydrogel membrane towards high separation performances for engineered osmosis |
| title_sort | fine tuning selective layer architecture of hydrogel membrane towards high separation performances for engineered osmosis |
| topic | Engineering::Civil engineering Engineered Osmosis Hydrogel Membrane |
| url | https://hdl.handle.net/10356/139711 |
| work_keys_str_mv | AT qindetao finetuningselectivelayerarchitectureofhydrogelmembranetowardshighseparationperformancesforengineeredosmosis AT liuzhaoyang finetuningselectivelayerarchitectureofhydrogelmembranetowardshighseparationperformancesforengineeredosmosis AT baihongwei finetuningselectivelayerarchitectureofhydrogelmembranetowardshighseparationperformancesforengineeredosmosis AT songxiaoxiao finetuningselectivelayerarchitectureofhydrogelmembranetowardshighseparationperformancesforengineeredosmosis AT lizhengtao finetuningselectivelayerarchitectureofhydrogelmembranetowardshighseparationperformancesforengineeredosmosis AT sundarrendelai finetuningselectivelayerarchitectureofhydrogelmembranetowardshighseparationperformancesforengineeredosmosis |