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    Imitated Core-Shell Molecularly Imprinted Membranes for Selective Separation Applications: A Synergetic Strategy by Polydopamine and SiO2

    Year: 2020

    Journal: J. Taiwan Inst. Chem. Eng., Volume 115, OCT, page 304–314

    Authors: Sun, Chang; Lu, Jian; Wu, Yilin; Meng, Minjia; Yu, Chao; Dong, Zeqing; Chen, Muning; Yan, Yongsheng; Sun, Yan

    Organizations: National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21808089, 21878120, 21777062, 51803080]; Natural Science Foundation of Jiangsu ProvinceNatural Science Foundation of Jiangsu Province [BK20180886, BK20190849, BK20180192, BK20181229, BK20191228, BK20171314, BK20161367]; Natural Science Foundation of the Higher Foundation of the Higher Education Institutions of Jiangsu Province [19KJB150024]; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2019M661750]

    Keywords: Imitated core-shell membrane; Synergetic strategy; Click chemistry; Selective separation; Cloxacillin

    Development of high-efficiency separation materials with specific recognition sites has become an urgent and important task. Herein, a synergetic strategy based on polydopamine (pDA) and silicon dioxide nanoparticles (SiO2) was successfully designed and developed for the preparation of imitated core-shell-based cloxacillin-imprinted nanocomposite membranes (ICCIMs-D/S). Cloxacillin (Col) was selected as the template resulting from the potential threat to environment and human health. As to the synthesis procedure of ICCIMs-D/S, the pDA-modified layers were uniformly loaded onto substrate membranes by developing an elevated phase transformation method. Based on it, the synergy processes of pDA and SiO2 could be achieved on surface of porous membranes. The ICCIMs-D/S with Col-imprinted recognition sites were finally synthesized by the photo-initiated "mercapto-alkenes click chemistry" method using methacrylic acid as functional monomers. Notably, the satisfactory rebinding selectivity (alpha>4.0) and permselectivity (beta>4.0) with outstanding regeneration performance (only 5.11% decrease after ten regeneration cycles) indicated the superior selectivity and stability of the as-obtained ICCIMs-D/S. The preparation strategy and ICCIMs-D/S developed in this work is expected to provide a feasible idea for selective separation of Col from wastewater. (c) 2020 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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