冠醚功能化咪唑离子液体固相微萃取涂层制备及应用研究

项目名称： 冠醚功能化咪唑离子液体固相微萃取涂层制备及应用研究

项目编号： No.20807018

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 刘名茗

作者单位： 华中农业大学

项目金额： 19万元

中文摘要： 本项目合成了烯丙基、羟乙基、乙烯基和烷氧基取代的离子液体以及冠醚功能化离子液体，以这些具有溶胶-凝胶反应活性的离子液体为涂层材料，采用溶胶-凝胶与自由基引发聚合技术制备了一批基于离子液体以及冠醚功能化离子液体的化学键合型有机-无机复合涂层固相微萃取探头，对其溶胶-凝胶反应途径和机理进行了探讨，对其表面形貌、结构和性能进行了表征，建立了水和土壤中酚类环境雌激素，水中芳胺以及农用薄膜中酞酸酯类化合物的离子液体固相微萃取气相色谱方法，得到如下主要结论。 1.制备的离子液体、冠醚功能化离子液体固相微萃取探头具有多孔的表面形貌，热稳定高，抗溶剂冲洗能力强，pH应用范围广，使用寿命长，制备重现性好，对极性较强的酚类环境雌激素、芳胺、脂肪酸、醇类和酞酸酯等化合物具有较高的选择性和萃取效率。 2.制备的离子液体-羟基硅油复合涂层的表面形貌，热稳定性，使用寿命以及选择性和萃取效率受离子液体阴阳离子结构以及溶胶-凝胶反应途径和机理的影响。 3.采用离子液体固相微萃取-气相色谱法分析复杂环境介质中的酚类环境雌激素、芳胺和酞酸酯，方法检测限低、线性范围宽，重现性好，准确度高。

中文关键词： 冠醚功能化咪唑离子液体；固相微萃取；涂层研制；溶胶-凝胶技术；酚类环境雌激素

英文摘要： In this work, allyl, hydroxylethyl, vinyl and alkoxyl-substituted ionic liquids and crown ether functionalized ionic liquids were synthesized and used as selective coating materials to prepare chemically bonded ionic liquid-based solid phase microextraction fibers by sol-gel method and free radical cross-linking technology. The underlying mechanisms of the sol-gel reaction were proposed. The surface morphology, polymeric molecular structure, physical, chemical and extraction performances of these in situ created sol-gel hybrid ionic liquid-hydroxy-terminated silicone oil coatings were investigated in detail. The developed ionic liquid-based sol-gel coatings were then used for the determination of phenolic environmental estrogens in water and soil, aromatic amines in water and phthalate esters in agricultural plastic films. The results are summarized as follows: 1. These ionic liquid- and crown ether functionalized ionic liquid-based sol-gel coatings had porous surface morphology, high thermal stability, strong solvent resistance, wide range pH stability, long lifetime, good coating preparation reproducibility, and high selectivity and extraction efficiencies to polar phenolic environmental estrogens, aromatic amines, fatty acids, alcohols and phthalate esters, etc. 2. The surface morphology, thermal stability, lifetime, selectivity and extraction efficiency of these ionic liquid-based coatings were greatly influenced by the cation and anion species in ionic liquid structures, and the different sol-gel reaction approaches and mechanisms. 3. The developed ionic liquid and crown ether functionalized ionic liquid-based solid phase microextraction-gas chromatography methods showed low limits of detections, wide linear ranges, good repeatability and high accuracy for the determination of phenolic environmental estrogens, aromatic amines and phthalate esters in complicated environmental media.

英文关键词： crowned imidazolium ionic liquid; solid phase microextraction; coating development; sol-gel technology; Phenolic environment estrogens