Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2018, Vol. 54 ›› Issue (4): 907-914.DOI: 10.13209/j.0479-8023.2018.015

Previous Articles    

Preparation and Optimization of a Palladium Ion Imprinted Polymer

TAO Huchun, LIU Wei, HUANG Shuaibin, CHENG Ling   

  1. Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055
  • Received:2017-05-10 Revised:2017-05-25 Online:2018-07-20 Published:2018-07-20
  • Contact: TAO Huchun, E-mail: taohc(at)pkusz.edu.cn

一种钯离子印迹聚合物的制备优化研究

陶虎春, 刘威, 黄帅斌, 程玲   

  1. 北京大学深圳研究生院环境与能源学院, 深圳市重金属污染控制与资源化重点实验室, 深圳 518055
  • 通讯作者: 陶虎春, E-mail: taohc(at)pkusz.edu.cn
  • 基金资助:
    深圳市基础研究项目(JCYJ20150731091351923, JSKF20150828173756275)和流域生态工程学学科建设资金(深发改[2017]542号)资助

Abstract:

Palladium (II) ion imprinted polymers (IIP) were prepared by precipitation polymerization method using PdCl42– as template, 4-vinylpridine(4-VP), 2-(allylthio)nicotinic acid (ANA), 2-Acetamidoacrylic acid (AAA) as functional monomer, respectively. In the polymerization method, the polymerization mixture included ethylene glycoldimethacrylate (EGDMA, cross-linking monomer), 2,2-azobisisobutyronitrile (AIBN, initiator) and methanol (porogen). The effects of different preparation conditions on the preparation of palladium ion imprinted polymers were investigated by the type of functional monomers, the dosage of functional monomers and crosslinking agents. The optimization results showed that compared with ANA and AAA, 4 -VP could form a stable complex with PdCl42– in the molar ratio of 4:1 with the largest binding constant and the best imprinting effect, which was the best choice for the synthesis of palladium (II) ion imprinted polymer. Furthermore, the adsorption experiment proved the adsorption capacity of 4-VP on its corresponding imprinted polymers in accordance to the ratio of template, functional monomer and cross-linking monomer as 1:4:40 reached a maximum of 5.042 mg/g.

Key words: palladium (II) ion imprinted polymers, functional monomer, adsorption

摘要:

采用沉淀聚合法, 以PdCl42−为模板, 以4-乙烯基吡啶(4-VP)、2-烯丙巯基烟酸(ANA)、2-乙酸胺基丙烯酸(AAA)为功能单体, 加入交联剂二甲基丙烯酸乙二醇酯(EGDMA)、引发剂偶氮二异丁腈(AIBN)和致孔剂甲醇, 制备钯离子印迹聚合物。通过添加不同种类、用量的功能单体和不同用量的交联剂, 探究不同制备条件对钯离子印迹聚合物制备效果的影响。优化结果表明, 与ANA和AAA功能单体对比, 4-VP和PdCl42–能形成4:1的稳定配合物, 结合常数最大, 印迹效果最好, 是 3 种功能单体中用于制备钯离子印迹聚合物的最佳选择。吸附试验结果进一步表明, 按照模板、功能单体、交联剂用量比例为1:4:40制备的钯离子印迹聚合物对Pd(II)的吸附量最大, 为5.042 mg/g。

关键词: 钯离子印迹聚合物, 功能单体, 吸附

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