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首页> 外文期刊>Applied Surface Science >Multilayered ion-imprinted membranes with high selectivity towards Li+ based on the synergistic effect of 12-crown-4 and polyether sulfone
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Multilayered ion-imprinted membranes with high selectivity towards Li+ based on the synergistic effect of 12-crown-4 and polyether sulfone

机译：基于12冠4和聚醚砜的协同效应对Li +具有高选择性的多层离子印迹膜

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摘要

High-selective multilayered Li+-imprinted membranes (Li-IIMs) with enhanced hydrophilicity and stability were developed based on polyether sulfone substrate membranes. The multilayered structure was prepared with polydopamine (pDA) as the interfacial adhesion layer, SiO2 nanoparticles as the hydrophilic layer and Li+-imprinted polymers as the imprinted layer. The selective "Li+-recognition sites" were formed using 12-crown-4 (12C4) as the adsorbing units. The optimal relative selectivity coefficients (alpha) of Li+/Na+ and Li+/K+ reached up to 1.85 and 2.07 with the imprinting factor (beta) of 2.51, and the high permselectivity factors (gamma) of Na+/Li+ (7.39) and K+/Li+ (9.86) were achieved on Li-IIMs. The Langmuir isotherm model and the pseudo-second-order kinetics model best fitted the rebinding data of Li-IIMs, as well as the rebinding capacities reached up to 90.3% of initial binding after 5 cycles of adsorption/desorption and just declined to 88.1% after another 5 cycles a month later. Therefore, the as-prepared Li-IIMs would have potential applications for the separation of lithium ions from salt lake brines. (C) 2017 Published by Elsevier B.V.
机译：基于聚醚砜基质膜，开发了具有更高亲水性和稳定性的高选择性多层Li +印迹膜（Li-IIMs）。制备多层结构，其中聚多巴胺（pDA）作为界面粘合层，SiO2纳米颗粒作为亲水层，Li +印迹聚合物作为印迹层。使用12冠4（12C4）作为吸附单元形成选择性的“ Li +识别位点”。 Li + / Na +和Li + / K +的最佳相对选择性系数（α）达到1.85和2.07，压印系数（β）为2.51，Na + / Li +（7.39）和K + /的高选择性磁系数（γ）在Li-IIM上获得了Li +（9.86）。 Langmuir等温模型和拟二级动力学模型最适合Li-IIMs的重结合数据，并且在5个吸附/解吸循环后，重结合能力达到了初始结合的90.3％，而下降到88.1％一个月后再进行5个周期。因此，所制备的Li-IIMs可能具有从盐湖盐水中分离锂离子的潜在应用。 （C）2017由Elsevier B.V.发布

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  • 来源
    《Applied Surface Science》 |2018年第ptaa期|931-941|共11页
  • 作者

    Lu Jian; Qin Yingying; Zhang Qi; Wu Yilin; Cui Jiuyun; Li Chunxiang; Wang Liang; Yan Yongsheng;

  • 作者单位

    Jilin Normal Univ, Coll Chem, Siping 136000, Peoples R China;

    Jiangsu Univ, Res Ctr Fluid Machinery Engn & Technol, Zhenjiang 212013, Peoples R China;

    Jiangsu Univ, Sch Chem & Chem Engn, Inst Green Chem & Chem Technol, Zhenjiang 212013, Peoples R China;

    Jiangsu Univ, Sch Chem & Chem Engn, Inst Green Chem & Chem Technol, Zhenjiang 212013, Peoples R China;

    Jiangsu Univ, Sch Chem & Chem Engn, Inst Green Chem & Chem Technol, Zhenjiang 212013, Peoples R China;

    Jiangsu Univ, Sch Chem & Chem Engn, Inst Green Chem & Chem Technol, Zhenjiang 212013, Peoples R China;

    Jilin Normal Univ, Coll Chem, Siping 136000, Peoples R China|Jilin Normal Univ, Minist Educ, Key Lab Preparat & Applicat Environm Friendly Mat, Changchun 130000, Jilin, Peoples R China;

    Jiangsu Univ, Sch Chem & Chem Engn, Inst Green Chem & Chem Technol, Zhenjiang 212013, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Li+-imprinted membranes; Multilayer; Polyether sulfone; 12-Crown-4; High selectivity;

    机译：锂离子印迹膜;多层;聚醚砜;12-Crown-4;高选择性;

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