Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/3903
標題: 藉由Azetidine-2,4-dione選擇性加成反應合成樹枝狀界面活性劑並探討其臨界微胞濃度
Determination of critical micelle concentration of dendritic surfactant synthesized via a selective ring-opening addition reaction of azetidine-2,4-dione
作者: 許智雄
Hsu, Chih-Hsiung
關鍵字: dendron;樹枝狀高分子;dendritic surfactant;critical micelle concentration (CMC);樹枝狀界面活性劑;臨界微胞濃度
出版社: 化學工程學系所
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摘要: 
在本研究中,一系列末端帶有四碳的樹枝狀化合物已被成功的合成,同時更進一步合成樹枝狀界面活性劑,其合成的方式主要是藉由Azetidine-2, 4-dione選擇性加成反應獲得我們期望的樹枝狀化合物。這些樹枝狀化合物的基本特性會以FT-IR、1H NMR、EA與FAB MS等分析鑑定結構,之後再進一步合成界面活性劑,此界面活性劑在本實驗中會先溶於含有2 %DMSO的DMSO-Water混合溶液中,進而觀察臨界微胞濃度(CMC)。因為樹枝狀界面活性劑是由一端帶電親水團,以及另一端疏水團所組成,因此當其形成微胞時,可藉由電導度與螢光感測等方法來測得CMC值,而從結果可得知,各種方法所得到的CMC值是非常接近的,此外,TEM也佐證了其構型是micelle的型狀。界達電位也很明確的觀察到形成微胞後表面電位的改變,在此做了進一步的應用,帶負電的陰離子染料相較於陽離子染料更容易吸附於樹枝狀界面活性劑上。

In this study, a series of dendrons with four carbons were synthesized and extended to obtain a dendritic surfactant. An azetidine-2,4-dione has been applied to synthesize dendrons on account of the characteristic of ring-opening reactions. The characteristics of [G-1]-C4 dendron were examined by fourier transform infrared (FT-IR), 1H nuclear magnetic resonance (1H NMR), elemental analyzsis (EA) and fast atom bombardment mass spectrometry (FAB MS) analyses. The dendritic surfactant was obtained from [G-1]-C4 dendron and dissolved in 2 wt % dimethyl sulfoxide (DMSO) water-DMSO solution to observe the critical micelle concentration (CMC). This dendritic surfactant was ionic with hydrophilic and hydrophobic groups. The CMC was determined by electrical conductivity and fluorescence measurements. From this result, the CMC was very close within measurements. Moreover, transmission electron microscopy (TEM) could confirm the formation and shape of micelle. Zeta potential measurement also provided an evidence of forming micelles. To extend the application, it adsorbed anion dyes successfully by its cation head group.
URI: http://hdl.handle.net/11455/3903
其他識別: U0005-1708201110101200
Appears in Collections:化學工程學系所

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