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    Codeposition of Polydopamine and Zwitterionic Polymer on Membrane Surface with Enhanced Stability and Antibiofouling Property

    Year: 2019

    Journal: Langmuir, Volume 35, FEB 5, page 1430–1439

    Authors: Yao, Liangsong; He, Chao; Chen, Shengqiu; Zhao, Weifeng; Xie, Yi; Sun, Shudong; Nie, Shengqiang; Zhao, Changsheng

    Organizations: National Natural Science Foundation of China [51503125, 51673125, 51603048]; State Key Research Development Programme of China [2016YFC1103000, 2016YFC1103001]; Program for Changjiang Scholars and Innovative Research Team in University [IRT_15R48]; Science and Technology Foundation of Guizhou Province; Youth Science and Technology Innovation Team of Sichuan Province [2015TD0001]

    Country: Tokyo, JAPAN

    Although abundant works have been developed in mussel-inspired antifouling coatings, most of them suffer from poor chemical stability, especially in a strongly alkaline environment. Herein, we report a robust one-step mussel-inspired method to construct a highly chemical stable and excellent antibiofouling membrane surface coating with a highly efficient codeposition of polydopamine (PDA) with zwitterionic polymer. In the study, PDA and polyethylenimine-quaternized derivative (PEI-S) are codeposited on the surface of poly(ether sulfone) (PES) ultrafiltration membrane in water at room temperature. In contrast to individual PDA coating, the obtained PDA/PEI-S coating exhibits excellent chemical stability even in a strongly alkaline environment owing to the cross-linking and unexpected cation-pi interaction between the PEI-S and PDA. Thanks to the introduction of PEI-S, systematic protein adsorption tests and bacteria adhesion experiments demonstrated that the surfaces could prevent bovine serum fibrinogen and lysozyme adsorption and could reduce Gram-positive bacteria S. aureus and Gram-negative bacteria E. coli adhesion. Benefiting from the versatile functionality of PDA, the proposed strategy is not limited to PES membrane surface but also others such as poly(ethylene terephthalate) sheets and commercial polypropylene microfiltration membranes. Overall, this work enriches the exploration of a remarkable coating with enhanced stability and excellent antifouling property via a facile, robust, and material-independent approach to modifying the membrane surface.
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