摘要
以商品化的离子交换膜为研究对象,通过离子印迹技术将模板离子Cu^(2+)印迹到离子膜表面,再经过环氧氯丙烷交联、HCl洗脱后,在外界电场的推动下制备得到Cu^(2+)离子印迹复合膜。结果显示,随着PEI溶液浓度的增加、电沉积时间的增长、电流的增大,膜上沉积的PEI量呈线性上升趋势;膜表面PEI沉积量增多,改性印迹膜对Cu^(2+)的通量增加,Cu/Zn选择性降低,当PEI浓度为5 g/L时,Cu/Zn逐渐趋于平衡;在0.03 mol/L的铜锌混合液中,对比印迹膜和非印迹膜对Cu^(2+)的选择透过性,印迹膜Cu/Zn为1.787,其选择性好于非印迹膜。
Taking the commercialized ion exchange membrane as the research object,the template ion Cu^(2+)was imprinted on the surface of the ion membrane by ion imprinting technology,and then crosslinked by epichlorohydrin and eluted by HCl,and the Cu^(2+)ion imprinted composite membrane was prepaed under the promotion of external electric field.The results showed that the amount of PEI deposited on the film increased linearly with the increase of PEI solution concentration,electrodeposition time and current;as the PEI deposition on the membrane surface increased,the Cu^(2+)flux of the modified imprinted membrane increased,and the Cu/Zn selectivity decreased.When the PEI concentration was 5 g·L^(-1),Cu/Zn gradually tended to balance;In 0.03 mol·L^(-1)mixed solution of copper and zinc,the selective permeability of imprinted film and non-imprinted film to Cu^(2+)was compared.The imprinted film Cu/Zn was 1.787,and its selectivity was better than that of non-imprinted film.
作者
田明
雷旭阳
张志华
邓宏颖
时雅滨
TIAN Ming;LEI Xv-yang;ZHANG Zhi-hua;DENG Hong-ying;SHI Ya-bin(Hebei Vocational University of Technology and Engineering,Xingtai Hebei 054000,China;Cangzhou Jiaotong College,Cangzhou Hebei 061199,China)
出处
《辽宁化工》
CAS
2023年第9期1268-1270,1274,共4页
Liaoning Chemical Industry
基金
河北省高等学校科学技术研究项目资助(项目编号:QN2022037)。
关键词
印迹
吸附
离子交换膜
Imprinting
Adsorption
Ion exchange membrane
