摘要
采用沉淀聚合法,以丙烯酰胺(AM)为功能单体,乙二醇二甲基丙烯酸酯(EDMA)为交联剂,对致孔溶剂的种类及用量、功能单体及交联剂的用量等实验条件进行了优化,分别制备了16种钴离子(Ⅱ)印迹聚合物(Co(Ⅱ)-IIPs)及相应的非印迹聚合物(NIPs).平衡吸附实验结果表明,最佳条件下制备的印迹聚合物Co(Ⅱ)-IIP6具有较大的吸附容量和较高的印迹因子.用扫描电子显微镜(SEM)及氮气吸附(BET)对Co(Ⅱ)-IIP6及相应的非印迹聚合物NIP-6的外部形态和内部结构进行了表征;并结合电感耦合等离子体发射光谱仪(ICP-OES)分析了Co(Ⅱ)-IIP6的吸附性能及吸附选择性.结果表明,与NIP-6相比较,Co(Ⅱ)-IIP6对Co(Ⅱ)具有较强的吸附能力和较好的吸附选择性.说明Co(Ⅱ)-IIP6对Co(Ⅱ)有较好的选择识别能力,有望用于实际样品中Co(Ⅱ)的分离富集.
Using precipitation polymerization method, acrylamide(AM) as functional monomer, ethylene glycol dimethacrylate(EDMA) as cross-linking agent, the experimental conditions such as the type and amount of porogenic solvent, functional monomer and cross-linker were optimized for prepared 16 cobalt ion(Ⅱ) imprinted polymers(Co(Ⅱ)-IIPs) and corresponding non-imprinted polymers(NIPs). The results of equilibrium adsorption experiments show that the imprinted polymer Co(Ⅱ)-IIP6 prepared under optimal conditions has a large adsorption capacity and a high imprinting factor. The morphology and structure of the optimal polymer Co(Ⅱ)-IIP6 were characterized by scanning electron microscope(SEM) and nitrogen adsorption(BET), and the adsorption properties and selectivity of Co(Ⅱ)-IIP6 were analyzed by Inductively Coupled Plasma Emission Spectrometer(ICP-OES). Compared with the non-imprinted polymer, the results showed that the imprinted polymer had stronger adsorption capacity and better adsorption selectivity for Co(Ⅱ), which indicates that the polymer has better selective recognition ability for Co(Ⅱ) and is expected to be used for the separation and enrichment of Co(Ⅱ) in actual samples.
作者
赵莉
余荟宇
李鹏
胡德琼
刘迎梅
字富庭
胡显智
成会玲
ZHAO Li;YU Hui-yu;LI Peng;HU De-qiong;LIU Ying-mei;ZI Fu-ting;HU Xian-zhi;CHENG Hui-ling(College of Science,Kunming University of Science and Technology,Kunming 650500,China)
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第5期949-957,共9页
Journal of Yunnan University(Natural Sciences Edition)
基金
国家自然科学基金(地区科学基金)(21764008)。
关键词
钴离子(Ⅱ)
离子印迹聚合物
沉淀聚合法
吸附选择性
cobalt ion(Ⅱ)
ion imprinted polymer
precipitation polymerization method
adsorption selectivity
