Mechanistic Insights into the Role of Polydopamine Interlayer toward Improved Separation Performance of Polyamide Nanofiltration Membranes
Zhe YangDepartment of Civil Engineering, the University of Hong Kong, Pokfulam, Hong Kong SAR 999077, P. R. ChinaFei WangDepartment of Civil Engineering, the University of Hong Kong, Pokfulam, Hong Kong SAR 999077, P. R. ChinaHao GuoDepartment of Civil Engineering, the University of Hong Kong, Pokfulam, Hong Kong SAR 999077, P. R. ChinaLu Elfa PengDepartment of Civil Engineering, the University of Hong Kong, Pokfulam, Hong Kong SAR 999077, P. R. ChinaXiao‐Hua MaSchool of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, P. R. ChinaXiaoxiao SongCenter for Membrane and Water Science & Technology, Ocean College, Zhejiang University of Technology, Hangzhou 310014, P. R. ChinaZhiwei WangState Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaChuyang Y. TangDepartment of Civil Engineering, the University of Hong Kong, Pokfulam, Hong Kong SAR 999077, P. R. China
2020en
ABI
Annotatsiya
). The TFNi membrane further showed enhanced rejection toward a wide range of inorganic salts and small organic molecules (including antibiotics and endocrine disruptors). Detailed mechanistic investigation reveals that the membrane separation performance was enhanced due to both the direct "gutter" effect of the PDA interlayer and its indirect effects resulting from enhanced polyamide formation on the PDA-coated substrate, with the "gutter" effect playing a more dominant role. This study provides a mechanistic and comprehensive framework for the future development of TFNi membranes.
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