Insights into the role of cross-linking agents on polymer template effect: A case study of anionic imprinted polymers
Insights into the role of cross-linking agents on polymer template effect: A case study of anionic imprinted polymers
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深入了解交联剂对聚合物模板效应的作用：阴离子印迹聚合物案例研究
DOI：
10.1016/j.cej.2021.129611
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发表时间：
2021-04-13
影响因子：
15.1
通讯作者：
Luo, Xubiao
中科院分区：
文献类型：
--
作者：
Hu, Huiqin;Ren, Zhong;Luo, Xubiao
模板效应是离子印迹聚合物（IIP）技术的重要特征。然而，在模板效应的理论化和实践应用方面还存在着差距。在这项工作中，我们提出了一种方法来控制IIPs的模板效应，通过调整交联的比例。合成了一系列不同交联剂含量的Cr（VI）-IIPs。在对配位选择性和模板效应进行定性分析的基础上，以Scatchard方程为依据，建立了交联剂产生模板效应的理论方程。在Cr（VI）去除过程中，当功能单体与交联剂的摩尔比为1/5.46时，模板效应的贡献开始超过配位效应，且随着交联剂含量的增加，模板效应进一步增强。在实际废水处理应用中，根据该方程设计的IIP-1/12和IIP-1/6对两种不同类型的废水均能有效处理。本研究所提出的标准化方程式与设计概念，从理论上说明交联剂在材料选择性中的作用。这使得在设计和应用中调节离子印迹技术的模板效应时具有更大的灵活性。
The template effect is known as the most important feature of ion imprinted polymer (IIP) technology. However, there has been a gap in the theorization of the template effect and apply the template effect to practice. In this work, we propose a method to control the template effect of IIPs by adjusting the ratio of cross-linking. A series of Cr(VI)-IIPs with various contents of the cross-linking agent were synthesized. Based on the qualitative analysis of the coordination selectivity and template effect, the theoretical equation of the template effect generated by the cross-linking agent was established rely on the Scatchard equation. In the Cr(VI) removal process, the contribution of template effect began to surpass the coordination effect when the molar ratio of functional monomer to cross-linking agent was 1/5.46, and the template effect further enhanced with the increase of cross-linking agent content. In the application of actual wastewater treatment, the IIP-1/12 and IIP-1/6 which are designed according to the resulting equation are effective to treat two different types of wastewater. The normalization equations and design concepts proposed in this study theoretically illustrate the role of cross-linking agent in the selectivity of materials. This allows for more flexibility in modulating the template effect of Ion Imprinted Technology for design and application.