|
|||||
|
|
Vapor-phase polymerization of high-performance thin-film composite membranes for nanofiltration |
|
| Authors: | Wanbin Li Zhe Yang Wulin Yang Hao Guo Chuyang Y Tang |
| Affiliation: | 1. Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, China;2. Department of Civil Engineering, The University of Hong Kong, Hong Kong, China
Contribution: Data curation (supporting), Investigation (supporting), Methodology (supporting), Resources (supporting);3. Department of Civil Engineering, The University of Hong Kong, Hong Kong, China College of Environmental Sciences and Engineering, Peking University, Beijing, China Contribution: Conceptualization (supporting), Investigation (supporting), Methodology (supporting), Resources (supporting), Writing - review & editing (supporting);4. Department of Civil Engineering, The University of Hong Kong, Hong Kong, China Contribution: Formal analysis (supporting), Methodology (supporting), Resources (supporting);5. Department of Civil Engineering, The University of Hong Kong, Hong Kong, China |
| Abstract: | Thin-film composite (TFC) membranes are commendable semipermeable barriers for water treatment. Although conventionally immiscible interfaces between aqueous and organic solutions are widely utilized for obtaining TFC membranes, interfacial polymerization still suffers from the issues of harmful solvents, complex diffusion/reaction of the reactants, and thermodynamic and kinetic instability of interfaces. In this study, vapor-phase polymerization with no requirements for organic solvent and immiscible interface is utilized for processing TFC nanofiltration membranes. Through cross-linking of β-cyclodextrin and piperazine layers by trimesoyl chloride vapor, polyester and polyamide TFC membranes with high cross-linking degree are simply prepared in a scalable and reproducible manner. The prepared TFC membranes exhibit stable nanofiltration and desalination performance for all water, organic solvent, and water–organic mixture systems, with permeance up to an order of magnitude higher than that of commercial membranes. |
| Keywords: | chemical vapor deposition composite membranes nanofiltration polymerization thin films |
