Hydrophilic/hydrophobic Janus membranes with a dual-function surface coating for rapid and robust membrane distillation desalination
文献类型：期刊论文
| 作者 | Zhang, Yan1,2; Shen, Fei1,2; Cao, Weifeng2; Wan, Yinhua1,2 |
| 刊名 | DESALINATION
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 491页码:10 |
| 关键词 | Hydrophilic coating Janus membrane Membrane distillation Desalination Dual-function coating |
| ISSN号 | 0011-9164 |
| DOI | 10.1016/j.desal.2020.114561 |
| 英文摘要 | Membrane distillation (MD) is a promising technique for desalinating brine and purifying wastewater but low water flux and severe membrane fouling always plague its practical application. Developing new membranes with both high flux and fouling resistance is highly desirable. Here, a hydrophilic/hydrophobic Janus membrane that can simultaneously achieve rapid and robust desalination via vacuum MD (VMD) was designed and fabricated by architecting a polydopamine-based hydrophilic surface coating on a commercial polytetrafluoroethylene (PTFE) membrane. Results demonstrated that such hydrophilic coating had the unique dual function: (1) boosting water evaporation via tuning the state of confined water and timely water replenishment and (2) providing a hierarchical layer with highly underwater oleophobicity. Due to the synergistic effect, the Janus membrane flux soared to 84.3 +/- 3.4 kg m(-2) h(-1) from 19.8 +/- 1.5 kg m(-2) h(-1) of the commercial PTFE membrane when treating a 3.5 wt% NaCl solution (70 degrees C, - 90 kPa), achieving an unprecedented 325.7% of flux enhancement, while also exhibiting long-term stability when desalinating oil-containing brine. Conversely, severe oil fouling occurred on the pristine PTFE membrane, quickly leading to near-zero flux. This work may provide a new platform and methodology for designing high-performance membranes for MD desalination. |
| WOS关键词 | COMPOSITE MEMBRANES ; HOLLOW-FIBER ; CARBON NANOTUBES ; FLUX ENHANCEMENT ; PERFORMANCE ; LAYER ; OIL ; PROPERTY ; FABRICATION ; SEPARATION |
| 资助项目 | Beijing Natural Science Foundation[8202044] |
| WOS研究方向 | Engineering ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000554911700037 |
| 出版者 | ELSEVIER |
| 资助机构 | Beijing Natural Science Foundation |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/41588]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Shen, Fei |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yan,Shen, Fei,Cao, Weifeng,et al. Hydrophilic/hydrophobic Janus membranes with a dual-function surface coating for rapid and robust membrane distillation desalination[J]. DESALINATION,2020,491:10. |
| APA | Zhang, Yan,Shen, Fei,Cao, Weifeng,&Wan, Yinhua.(2020).Hydrophilic/hydrophobic Janus membranes with a dual-function surface coating for rapid and robust membrane distillation desalination.DESALINATION,491,10. |
| MLA | Zhang, Yan,et al."Hydrophilic/hydrophobic Janus membranes with a dual-function surface coating for rapid and robust membrane distillation desalination".DESALINATION 491(2020):10. |
入库方式： OAI收割
来源：过程工程研究所
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