Preparation of polysulfone-graft-monoazabenzo-15-crown-5 ether porous membrane for lithium isotope separation

Preparation of polysulfone-graft-monoazabenzo-15-crown-5 ether porous membrane for lithium isotope separation
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聚砜接枝单氮杂苯并15冠5醚锂同位素分离多孔膜的制备

DOI:
10.1007/s10967-018-5918-x
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发表时间:
2018-05
影响因子:
1.6
通讯作者:
He Benqiao
He Benqiao
中科院分区:
化学4区
文献类型:
--
作者:
Yan Feng;Liu Yaolong;Wang Mingxia;Yang Boran;Pei Hongchang;Li Jianxin;Cui Zhenyu;He Benqiao

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通过亲核取代反应合成了一种新型聚砜接枝单氮杂苯并15冠5(PSF-g-BN 15 C5)聚合物,并用FT-IR、1H NMR、TGA、XPS等手段对其进行了表征。采用非诱导相分离法制备了具有海绵状结构的PSF-g-BN 15 C5多孔膜,并用于锂同位素分离。考察了锂盐、温度和冠醚固载量对分配系数和分离因子的影响。结果表明,H2O-LiI/PSF-g-BN 15 C5固液萃取体系的最大分离因子为1.049 ± 0.002。此外,由于较强的键合环境,轻同位素6 Li在膜相中富集。
A novel polysulfone-graft-monoazabenzo-15-crown-5 ether (PSF-g-BN15C5) polymer was prepared via nucleophilic substitution reaction and characterized by FT-IR,1H NMR, TGA, and XPS. The non-induced phase separation was employed to fabricate PSF-g-BN15C5 porous membrane with sponge-like structure for lithium isotope separation. The effects of lithium salt, temperature and immobilization amount of crown ether on distribution coefficient and separation factor were explored. Results showed that a maximum separation factor obtained from the solid–liquid extraction system of H2O-LiI/PSF-g-BN15C5 was up to 1.049 ± 0.002. Furthermore, the light isotope6Li was enriched in the membrane phase owing to the stronger bonding environment.
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