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首页> 外文期刊>Journal of Hazardous Materials >Novel polysiloxane resin functionalized with dicyclohexano-18-crown-6 (DCH18C6): Synthesis, characterization and extraction of Sr(Ⅱ) in high acidity HNO_3 medium
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Novel polysiloxane resin functionalized with dicyclohexano-18-crown-6 (DCH18C6): Synthesis, characterization and extraction of Sr(Ⅱ) in high acidity HNO_3 medium

机译：用双环己酮-18-冠-6（DCH18C6）功能化的新型聚硅氧烷树脂：高酸度HNO_3介质中Sr（Ⅱ）的合成，表征和萃取

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摘要

A novel kind of polysiloxane resin functionalized with dicyclohexano-18-crown-6 (DCH18C6) was synthesized through a post-modification approach. The DCH18C6 moieties bearing amino groups were firstly prepared, followed by covalent grafting to a silica precursor P-(CH_2)_3-Cl (Where P represents a 3-dimentional polymerized silica matrix) based on nucleophilic substitution reaction. ~(29)Si and ~(13)C solid-state NMR, FT-IR, XPS, TGA, ESEM and elemental analysis were employed to systematically characterize the structure, thermal property and surface morphology of the functionalized resin. The results indicated that the DCH18C6 ligands were successfully bonded to the polysiloxane resin with a satisfactory grafting degree (33.6 wt.%). Due to the robust organosilica framework and the covalent immobilization of the ligands, the functionalized resin had excellent thermal stability and acid resistance. Batch experiments showed that the resin could effectively separate Sr(Ⅱ) in high acidity mediums. The distribution coefficient (K_d) of 43.6cm~3/g could be achieved in 5.0 mol/L HNO_3 solution. The influences of contact time and acidity of HNO_3 on the resin's extraction performance were examined. The reusability and the selectivity to Sr(Ⅱ) over interference ions were investigated. The DCH18C6-functionalized resin might be potentially applied for the radiostrontium removal in the high level liquid waste (HLLW).
机译：通过后改性的方法合成了一种新型的用二环己酮-18-冠-6（DCH18C6）功能化的聚硅氧烷树脂。首先制备具有氨基的DCH18C6部分，然后基于亲核取代反应将其共价接枝到二氧化硅前体P-（CH_2）_3-Cl（其中P代表3-维聚合的二氧化硅基质）上。利用〜（29）Si和〜（13）C固态NMR，FT-IR，XPS，TGA，ESEM和元素分析系统地表征了功能化树脂的结构，热性质和表面形态。结果表明，DCH18C6配体以令人满意的接枝度（33.6重量％）成功地键合到聚硅氧烷树脂上。由于坚固的有机硅骨架和配体的共价固定，功能化树脂具有出色的热稳定性和耐酸性。批处理实验表明，该树脂可以在高酸性介质中有效分离Sr（Ⅱ）。在5.0 mol / L HNO_3溶液中可达到43.6cm〜3 / g的分布系数（K_d）。研究了HNO_3的接触时间和酸度对树脂萃取性能的影响。研究了干扰离子对Sr（Ⅱ）的可重用性和选择性。 DCH18C6官能化的树脂可能潜在地用于去除高放废液（HLLW）中的放射性锶。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第30期|p.8-14|共7页
  • 作者

    Gang Ye; Feifei Bai; Jichao Wei; Jianchen Wang; Jing Chen;

  • 作者单位

    Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China;

    Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China;

    Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China;

    Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China;

    Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    crown ether; DCH18C6; polysiloxane resin; strontium extraction;

    机译：冠醚DCH18C6;聚硅氧烷树脂锶提取;

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