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摘要：本课题是在CHI 660D电化学工作站环境中用四电极体系进行电化学研究，主要通过循环伏安法和i-t曲线法研究Nafion膜修饰的水/1,2-二氯乙烷（W/DCE）界面的电化学窗口，阳离子转移情况及相转移结晶的研究。本实验首先对Nafion膜进行扫描电镜表征，发现膜表面平整无孔；之后研究了Nafion膜修饰的W/DCE界面的电化学窗口，还发现不同的阳离子在该界面上能够发生转移反应；再通过使用i-t曲线法和相转移晶化法在Nafion膜修饰的W/DCE界面上得到了晶体。本课题发现均相阳离子交换膜可以用于修饰液/液界面，而且通过相转移晶化法可以得到晶体。52614
毕业论文关键词： 阳离子交换膜；液/液界面；相转移晶化；Nafion膜
Study on the Phase Transfer Crystallization at the Liquid/Liquid Interface Modified by the Cation Exchange Membrane
Abstract：Electrochemical research in four-electrode system with the CHI 660D electrochemical workstation is studied in this topic. Electrochemical window, transfer of cations and phase transfer crystallization are researched by cyclic voltammetry and i-t curve at the water/1,2-dichloroethane (W/DCE) interface modified by the Nafion membrane. Firstly, the surface is smooth and without holes which characterized by the Scanning Electron Microscopy. Then, the electrochemical window is studied at the W/DCE interface modified by the Nafion membrane, and different cation transfer reactions could occur at the interface. Crystals are got on the W/DCE interface modified by the Nafion membrane through i-t curve and phase transfer crystallization. Homogeneous cation exchange membrane can be used to modify the liquid/liquid interface and crystals are got by the phase transfer crystallization method were found in this object.
Key words: cation exchange membrane; liquid/liquid interface; phase transfer crystallization; Nafion
目录
1绪论 1
1.1 研究背景 1
1.2 离子交换膜 1
1.3 Nafion膜 2
1.4 相转移晶化 3
1.5 研究目的与意义 5
2 实验部分 6
2.1 实验仪器和试剂 6
2.1.1 仪器 6
2.1.2 试剂 6
2.1.3 试剂的配置 7
2.2 实验原理 7
2.2.1 液/液界面的结构及模型 7
2.2.2 电极体系介绍 9
2.3 实验内容 11
2.3.1 实验仪器及装置图 11
2.3.2 Nafion膜的外貌及表征 12
2.3.3膜的前处理 13
2.3.4 实验流程 13
2.3.5 条件摸索 14
3结果与讨论 15
3.1实验结果的分析与讨论 15
3.1.1空白电化学窗口研究 15
3.1.2 H+相转移的研究 16
3.1.3 K+结晶现象的研究 17
3.1.4 Li+结晶现象的研究 19
3.1.5 Na+结晶现象的研究 21
3.1.6 Mg2+结晶现象的研究 22