Novel polysiloxane resin functionalized with dicyclohexano-18-crown-6 (DCH18C6): Synthesis, characterization and extraction of Sr(Ⅱ) in high acidity HNO_3 medium

Gang Ye; Feifei Bai; Jichao WeiJianchen WangJing Chen

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：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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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).

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来源
《Journal of hazardous materials》 |2012年第30期|8-14|共7页
作者
Gang Ye; Feifei Bai; Jichao WeiJianchen WangJing Chen;
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作者单位

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

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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
正文语种英语
中图分类工程基础科学;
关键词
crown ether; DCH18C6; polysiloxane resin; strontium extraction;

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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