Enhancing the Oil-Fouling Resistance of Polymeric Membrane Ion-Selective Electrodes by Surface Modification of a Zwitterionic Polymer-Based Oleophobic Self-Cleaning Coating,Analytical Chemistry

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Enhancing the Oil-Fouling Resistance of Polymeric Membrane Ion-Selective Electrodes by Surface Modification of a Zwitterionic Polymer-Based Oleophobic Self-Cleaning Coating
Analytical Chemistry ( IF 6.7 ) Pub Date : 2021-04-29 , DOI: 10.1021/acs.analchem.1c01116
Longbin Qi _{1,

2} , Tianjia Jiang _{1,

3} , Rongning Liang _{1,

3} , Wei Qin _{1,

3,

4}

Affiliation

Due to the frequent oil spill accidents and pollution of industrial oily wastewater, oil fouling has become a great challenge to polymeric membrane ion-selective electrodes (ISEs) for applications in oil-contaminated areas. Herein, a simple approach is proposed to enhance the oil-fouling resistance of polymeric membrane ISEs by surface modification of a zwitterionic polymer-based underwater oleophobic coating. As a proof-of-concept, a classical poly(vinyl chloride) membrane-based calcium ion-selective electrode (Ca²⁺-ISE) is chosen as a model sensor. The zwitterionic polymer-based coating can be readily modified on the sensor’s surface by immersion of the electrode into a mixture solution of dopamine and a zwitterionic acrylate monomer (i.e., sulfobetaine methacrylate, SBMA). The formed poly(SBMA) (PSBMA) coating alters the oleophilic membrane surface to an oleophobic one, which endows the surface with excellent self-cleaning properties without loss of the sensor’s analytical performance. Compared to the pristine Ca²⁺-ISE, the PSBMA-modified Ca²⁺-ISE exhibits an improved analytical stability when exposed to oil-containing wastewater. The proposed approach can be explored to enhance the oil-fouling resistance of other polymeric membrane-based electrochemical sensors for use in the oil-polluted environment.

中文翻译：

通过基于两性离子聚合物的疏油自洁涂层的表面改性，提高聚合物膜离子选择电极的耐油垢性

由于频繁发生漏油事故和工业含油废水的污染，油污已经成为聚合物膜离子选择电极（ISE）在油污染地区的应用所面临的巨大挑战。本文中，提出了一种简单的方法来通过基于两性离子聚合物的水下疏油涂层的表面改性来增强聚合物膜ISE的耐油垢性。作为概念验证，经典的聚氯乙烯膜基钙离子选择电极（Ca ²⁺-ISE）被选为模型传感器。通过将电极浸入多巴胺和两性离子丙烯酸酯单体（即磺基甜菜碱甲基丙烯酸酯，SBMA）的混合溶液中，可以轻松地在传感器表面上修饰基于两性离子聚合物的涂层。形成的聚（SBMA）（PSBMA）涂层将亲油膜表面变为疏油膜，从而使表面具有出色的自清洁性能，而不会损失传感器的分析性能。与原始Ca ²⁺ -ISE相比，PSBMA修饰的Ca ²⁺-ISE暴露于含油废水时显示出改进的分析稳定性。可以探索提出的方法来增强在油污染环境中使用的其他基于聚合物膜的电化学传感器的耐油污性。

更新日期：2021-05-11

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