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Novel ionic surface imprinting technology: design and application for selectively recognizing heavy metal ions

机译：新型离子表面压印技术：选择性识别重金属离子的设计和应用

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摘要

Traditional bulk polymerization imprinted technology and existing surface imprinted technology have some congenital defects. Therefore, it is necessary to design more efficient surface imprinted technology. In this paper, novel surface imprinting technology with higher imprinting efficiency is well designed. It fully realizes the synchronization of polymer crosslinking and template imprinting. Then the surface imprinted polymers (SIPs) are synthesized using metal ions as a template. The physicochemical characteristics of the SIPs are characterized by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) studies, Fourier transform infrared spectroscopy (FTIR) and elemental analysis. The adsorption performances and recognition selectivity of the SIPs towards the template are investigated by a batch method. The experimental results show that the SIPs possess excellent adsorption ability and selectivity towards the template. The selectivity coefficients of the SIPs prepared in this study are higher than those of IIPs prepared by other imprinting methods. The adsorption process could be well described by the Lagergren-first-order model and Langmuir monolayer chemical adsorption. The SIPs have good chemical stability and reusability. Consecutive adsorption–desorption experiments show that the exhausted SIPs could be effectively regenerated, and the regenerated SIPs could be reused without a significant reduction in adsorption capacity or selectivity coefficient.
机译：传统的本体聚合印迹技术和现有的表面印迹技术具有一些先天的缺陷。因此，有必要设计更有效的表面压印技术。在本文中，精心设计了具有更高压印效率的新型表面压印技术。它完全实现了聚合物交联与模板压印的同步。然后，以金属离子为模板合成表面印迹聚合物（SIP）。 SIP的理化特性通过扫描电子显微镜（SEM），Brunauer-Emmett-Teller（BET）研究，傅立叶变换红外光谱（FTIR）和元素分析来表征。采用间歇法研究了SIPs对模板的吸附性能和识别选择性。实验结果表明，SIPs具有优异的吸附能力和对模板的选择性。本研究中制备的SIP的选择性系数高于通过其他压印方法制备的IIP的选择性系数。吸附过程可以由Lagergren-一级模型和Langmuir单层化学吸附很好地描述。 SIP具有良好的化学稳定性和可重复使用性。连续的吸附-解吸实验表明，用完的SIPs可以有效地再生，并且再生的SIPs可以重复使用而不会显着降低吸附容量或选择性系数。

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