种球溶胀悬浮聚合法制备镉(II)离子印迹聚合物微球*

doi:10.11901/1005.3093.2015.488

材料研究学报

2016, Vol. 30

Issue (9): 669-674 DOI: 10.11901/1005.3093.2015.488

研究论文

本期目录 | 过刊浏览

种球溶胀悬浮聚合法制备镉(II)离子印迹聚合物微球*

孙智纯,王兵,单娟娟

天津工业大学省部共建分离膜与膜过程国家重点实验室天津工业大学环境与化学工程学院天津 300387

Preparation of Cadmium(II) Ion Imprinted Polymer Microspheres by Seedball Swelling Suspension Polymerization

Zhichun SUN,Bing WANG,Juanjuan SHAN

State Key Laboratory of Separation Membranes and Membrane Processes (Tianjin Polytechnic University), School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China

引用本文:

孙智纯,王兵,单娟娟. 种球溶胀悬浮聚合法制备镉(II)离子印迹聚合物微球*[J]. 材料研究学报, 2016, 30(9): 669-674.
Zhichun SUN, Bing WANG, Juanjuan SHAN. Preparation of Cadmium(II) Ion Imprinted Polymer Microspheres by Seedball Swelling Suspension Polymerization[J]. Chinese Journal of Materials Research, 2016, 30(9): 669-674.

全文: PDF(1301 KB) HTML

摘要:

以聚苯乙烯为种球、镉(II)离子为模板、安息香肟为功能单体、乙二醇二甲基丙烯酸酯(EGDMA)为交联剂, 采用种球溶胀悬浮聚合法在水相环境中制备了镉离子印迹聚合物微球(IIPs)。使用紫外光谱(UV)、傅里叶变换红外光谱仪(FT-IR)研究了模板离子与功能单体之间的最佳配比和相互作用, 用扫描电子显微镜观测了印迹聚合物的微观形貌。进行平衡和等温吸附实验研究了印迹聚合物微球的吸附性能。结果表明, 镉(II)离子与安息香肟之间有相互作用, 其最佳配比为1:2; 合成的IIPs外形规则, 分散性较好; 溶液的pH值为6时该IIPs达到最佳吸附效果, 且对镉离子有较好的结合能力, 具有较高的特异识别性, 可对水环境中的镉离子进行有效的吸附和分离。

关键词 ：有机高分子材料, 离子印迹聚合物微球, 种球溶胀悬浮聚合, 镉(II)离子, 选择性吸附

Abstract：

Cadmium(II) ion imprinted polymer microspheres (IIPs) were synthesized by seedball swelling suspension polymerization in aqueous system, using polystyrene emulsion as seedball, cadmium(II) ion as template, α-benzoin oxime as functional monomer and ethylene glycol dimethacrylate (EGDMA) as cross-linker. The interaction between cadmium(II) and α-benzoin oxime of cadmium(II) IIPs were investigated by UV spectroscopy and Fourier transform infrared spectroscopy (FT-IR) and then the optimal ratio of the two was acquired. In addition, the microstructure of the prepared IIPs was observed by scanning electron microscopy (SEM). Equilibrium adsorption and isothermal adsorption experiments were carried out to investigate the cadmium(II)-adsorption ability of the prepared IIPs. The results indicate that there existed interaction between the template and the monomer, and the best ratio of the two is 1:2. The IIPs showed good dispersibility with uniform size distribution, which exhibited high adsorption and good specific selectivity to cadmium(II) for the solutions with pH 6. The IIPs could be used to effectively extract cadmium(II) from aqueous solutions.

Key words： organic polymer materials ion imprinted polymer microspheres seedball swelling suspension polymerization cadmium(II) selectivity adsorption

收稿日期: 2015-12-04

基金资助:* 天津市自然科学基金13JCQNJ C02600资助项目

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https://www.cjmr.org/CN/10.11901/1005.3093.2015.488 或 https://www.cjmr.org/CN/Y2016/V30/I9/669

图1 Cd(Ⅱ)离子与安息香肟不同摩尔比的紫外光谱图

图2 不同聚合物的红外光谱图

图3 印迹聚合物微球的扫描电镜照片

图4 pH值对吸附量的影响

图5 聚合物微球的吸附动力学曲线

图6 印迹微球的二级动力学拟合

图7 印迹分子在IIPs和NIPs上的吸附等温线

表1 IIPs 和NIPs对不同底物的分配系数K及分离因子α

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