首页|2-氨甲基吡啶衍生物聚合物包合膜选择性回收Cu(Ⅱ)

2-氨甲基吡啶衍生物聚合物包合膜选择性回收Cu(Ⅱ)

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
  • 维普
以不同2-氨甲基吡啶类衍生物(N,N-二(叔丁氧羰基亚甲基)-2-氨甲基吡啶、N,N-二辛基-2-氨甲基吡啶、N-叔氧羰基亚甲基-N-辛基-2-氨甲基吡啶、N,N-二癸基-2-氨甲基吡啶)为载体,制备以聚氯乙烯(PVC)为膜基材的系列聚合物包容膜(PIM);通过优化载体分子结构和塑化剂类型,考察聚合物包容膜的铜离子渗透通量和分离选择性.结果表明:含有长碳链的疏水性吡啶类衍生物有助于提高铜离子传质通量和膜的稳定性.在PVC含量为30％(质量分数),N,N-二癸基-2-氨甲基吡啶为30％(质量分数),塑化剂为40％(质量分数)时,铜离子的渗透通量可达5.8×10−6 mol·m−2·s−1.FT-IR和XPS分析结果表明,N,N-二癸基-2-氨甲基吡啶上的氨基官能团参与铜离子的配位,SAXS分析证实2-氨甲基吡啶类衍生物的疏水性改性有利于膜中微通道的形成,从而促进铜离子在膜内的传质.
Selective recovery of Cu(Ⅱ) through polymer inclusion membranes mediated with 2-aminomethylpyridine derivatives
The Cu(Ⅱ) separation behaviors with polymer inclusion membranes (PIMs) are explored by modifying 2-aminomethylpyridine derivatives with hydrophobic alkyl chains, including 2-[N-(tert-butyloxycarbonylmethyl)- 2-picolyamino]acetate (AMB), N,N-dioctyl-2-aminomethylpyridine (AMD), tert-butyl 2-(N-octyl-2-picolyamino) acetate (AMC), and N,N-didecyl-2-aminomethylpyridine (AME). The transport flux and selectivity of Cu(Ⅱ) are determined by optimizing composition and structure of carriers and plasticizers. The results show that the hydrophobic modification of 2-aminomethylpyridine derivatives can boost the selective transport of copper ions in PIMs and membrane stability. In the optimum composition of 30 wt.％ PVC, 30 wt.％ AME, and 40 wt.％ NPOE, the initial flux of Cu(Ⅱ) is 5.8×10−6 mol·m−2·s−1. The FT-IR and XPS spectra identify that the alkyl amine functional groups of AME involve in the transport of copper chloride species. The SAXS analysis demonstrates that the generated micro-channels in PIMs induced by the hydrophobic modification of 2-aminomethylpyridine derivatives can contribute to the enhanced Cu(Ⅱ) flux.

hydrophobic modification2-aminomethylpyridine derivativepolymer inclusion membraneCu(Ⅱ) separation

邱雪景、汤佳、谭军、胡慧萍、纪效波、胡久刚

展开 >

中南大学 化学化工学院,长沙 410083

疏水性改性 2-氨甲基吡啶类衍生物 聚合物包容膜 铜离子分离

authors are grateful for the financial supports from the National Key R&D Program of ChinaNational Natural Science Foundation of ChinaHunan Provincial Science and Technology Plan Project,Chinaand Innovation-Driven of Central South University,China

2019YFC1907801521742862019JJ300312020CX007

2021

10.1016/S1003-6326(21)65750-3

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(11)
  • 1
  • 7