采用溶液共混合相转移新技术,经二乙烯三胺五乙酸(DTPA)和三聚氰胺共价键合作用,制备了具有螯合配位作用的DTPA改性聚偏氟乙烯(PVDF)分离膜,采用热重(TG)、差示扫描量热(DSC)、环境扫描电镜(ESEM)、核磁共振谱(NMR)、X射线衍射(XRD)和傅立叶红外光谱(FT-IR)对PVDF改性膜进行了表征,研究了PVDF改性膜对Cu<'2+>的吸附性能.实验结果表明,具有螯合配位作用的多氨基多羧酸基团被成功共混到PVDF分离膜中,PVDF改性膜对Cu<'2+>的吸附性能优良,PVDF改性膜的吸附/脱附性能优良,经吸附/脱附4次循环后,其对Cu<'2+>吸附量大于0.026 mg/cm<'2>,脱附率仍超过95%.
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