CAJ | 학술논문

将功能大分子聚乙烯亚胺(polyethylenei-mine,PEI)化学接枝到硅胶微粒表面,成功制得了功能接枝材料 PEI/SiO2；采用表面印迹技术,以 Sc3＋为模板离子,乙二醇二缩水甘油醚为交联剂,对硅胶表面的PEI大分子链进行了交联,同时实现了 Sc3＋离子的印迹,制得了Sc3＋印迹材料 IIP-PEI/SiO2.采用静态法研究了 IIP-PEI/SiO2对 Sc3＋的结合特性与识别选择性.实验结果表明,Sc3＋印迹材料 IIP-PEI/SiO2对Sc3＋具有强的结合亲合性与优良的识别选择性.IIP-PEI/SiO2对Sc3＋的结合容量可以达到1．08 mg/g,结合行为服从 Freundlich 单分子层吸附.相对于 Al3＋离子和Fe3＋离子,IIP-PEI/SiO2对Sc3＋离子的选择性系数分别为4．21和5．73.对模拟和实际赤泥酸浸液进行了研究,实现了Sc3＋的高效回收.另外,IIP-PEI/Si O 2具有良好的重复使用性能.
장공능대분자취을희아알(polyethylenei-mine,PEI)화학접지도규효미립표면,성공제득료공능접지재료 PEI/SiO2；채용표면인적기술,이 Sc3＋위모판리자,을이순이축수감유미위교련제,대규효표면적PEI대분자련진행료교련,동시실현료 Sc3＋리자적인적,제득료Sc3＋인적재료 IIP-PEI/SiO2.채용정태법연구료 IIP-PEI/SiO2대 Sc3＋적결합특성여식별선택성.실험결과표명,Sc3＋인적재료 IIP-PEI/SiO2대Sc3＋구유강적결합친합성여우량적식별선택성.IIP-PEI/SiO2대Sc3＋적결합용량가이체도1．08 mg/g,결합행위복종 Freundlich 단분자층흡부.상대우 Al3＋리자화Fe3＋리자,IIP-PEI/SiO2대Sc3＋리자적선택성계수분별위4．21화5．73.대모의화실제적니산침액진행료연구,실현료Sc3＋적고효회수.령외,IIP-PEI/Si O 2구유량호적중복사용성능.
Polyethyleneimine (PEI)was grafted onto the surface of silica gel particles,and functional grafting material PEI/SiO2 was prepared successfully.Then the ionic imprinted polyethyleneimine on the surface of silica gel was prepared using Sc3+ as template ions and ethylene glycol diglycidyl ether (EGDE)as crosslinking agent and ionic imprinted material IIP-PEI/SiO2 was obtained.The binding and recognizing properties of IIP-PEI/SiO2 for Sc3+ are researched using batch and methods.The experiment results show that the ionic imprinted ma-terial IIP-PEI/SiO2 possesses strong binding affinity and specific recognition selectivity property for Sc3+.The binding capacity could reach to 1.08 mg/g,and binding isotherm data greatly obey the Freundlich model.The relative selectivity coefficient relative to Al3+ and Fe3+ was 4.21 and 5.73,respectively.The Sc3+ in simulative and actual acid dipping solution of red mud was recovered effectively.Besides,the IIP-PEI/SiO2 can be regener-ated easily and IIP-PEI/SiO2 possesses better reusability.