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標題: | 水+正辛烷+界面活性劑C4E1三成份系統之相行為研究與利用溶膠凝膠法製備隨時間演變之薄膜 A Study on Phase Behavior of the ternary system Water+ N-octane+ Surfactant C4E1 System and Evolution of Morphology in A Sol-gel Process |
作者: | Shin-Hong Chen 陳信宏 |
指導教授: | 陳立仁(Li-Jen Chen) |
關鍵字: | 液-液相平衡相圖,NRTL 模型,溶膠凝膠,旋轉塗佈法,超疏水, liquid–liquid equilibrium,phase diagram,NRTL model,Ternary system,sol-gel,spin-coating,superhydrophobic, |
出版年 : | 2014 |
學位: | 碩士 |
摘要: | 本研究分為兩部份,第一部份針對水+正辛烷+非離子型界面活性劑C4E1之三成份系統探討其相行為,C4E1 為醇醚類化合物,為CH3(CH2)3(OCH2CH2)OH之縮寫。此系統具有三液相共存區的存在,利用水與正辛烷的重量比為1:1 並改變C4E1 的重量分率,觀察系統於不同溫度達平衡時的液相數目,將結果繪製成魚形相圖。接著利用氣相層析儀,對系統進行液-液相平衡量測,並將結果繪製成三角相圖,根據實驗結果,系統隨溫度上升,可觀察到從兩液相轉變為三液相再轉變成兩液相的相行為。此外,我們利用NRTL 及UNIQUAC 模型對實驗數據進行迴歸及理論計算,發現NRTL 模型可有效地描述水+正辛烷+C4E1 三成分系統的相行為。
第二部分,利用溶膠凝膠法將methyl-tri(2-hydroxyethyl)orthosilicate 當作前驅物與pluronic 界面活性劑合成出中孔洞的二氧化矽材料,並利用旋轉塗佈法將溶膠鍍玻璃基材上,經過鍛燒程序後,利用觀察表面型態了解系統中形貌隨著時間的改變,再利用矽烷類自組裝單分子降低表面能之後,利用前進角及後退角的量測探討表面型態對表面親疏水性的影響,發現最高角度可達155°,為超疏水表面。 The first part of this study, we investigate the phase behavior of the ternary water + n-octane + nonionic surfactant C4E1 system. C4E1 is the abbreviation of CH3(CH2)3(OCH2CH2)OH. There were three-liquid-phase-coexisting regions in the system. Experiments of fish-shaped phase diagrams for the system were performed at constant water/n-octane weight ratio (1/1) with varying weight fraction of surfactant,and the number of liquid phases was recorded at different temperature. There was a transition for the number of liquid phases from two to three, and then to two along with increasing temperature. Liquid–liquid equilibrium measurements were performed by gas chromatography. For the two-liquid-phase-coexisting regions, there was more C4E1 in the lower phase at the lower temperature; however, there was more C4E1 in the upper phase at the higher temperature. The experimental liquid-liquid equilibrium data were successfully correlated with the NRTL model. In the second part of this study, we use a novel precursor methyl-tri(2-hydroxyethyl)orthosilicate, incorporated with a pluronic surfactant, to synthesize mesoporous silica material via sol-gel process in aqueous solution.Evolution of the morphology of the sol-gel system has been monitored by spin-coating the sol-gel solution onto the glass substrate to “freeze” the morphology in the sol-gel process. The nano- and micro-domain formation and growth in the sol-gel process are discussed. These substrates were further calcinated and modified by silaned self-assembled monolayer to lower their surface energy. The effect of morphology on the surface hydrophobicity will be also discussed. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/57345 |
全文授權: | 有償授權 |
顯示於系所單位: | 化學工程學系 |
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