三成分水+正癸烷+界面活性劑C3P2和水+正癸烷+界面活性劑C6E2系統之相行為研究

Abstract

本論文中研究水+油+非離子型界面活性劑在不同溫度下的相行為，使用的油為正癸烷，界面活性劑為CiPj或CiEj，兩者皆為醇醚類化合物。CiPj為CH3(CH2)i-1(OCH2CH(CH3))jOH之縮寫，其中i代表非極性碳氫鏈長度，而j代表丙烯氧基的數目。CiEj為CH3(CH2)i-1(OCH2CH2)jOH之縮寫，i代表的也是碳氫鏈長度，但j代表的是乙烯氧基的數目。我們研究三成分水+正癸烷+C3P2系統在283.15、298.15、313.15 K的相行為，以及三成分水+正癸烷+C6E2系統在283.15、293.15、303.15 K的相行為。將配好的三成分溶液放入恆溫水槽，等待平衡後觀察分相的情形，並使用氣相層析儀分析各相的成分組成，並將結果繪製成共六張三角相圖。其中水+正癸烷+C6E2系統在283.15 K和293.15 K兩個溫度下有三液相平衡區，且在三相區的周圍有三個兩相區；其餘的系統則只有一個大的兩相區。

In this study, we investigate phase behavior of the ternary water + n-decane + nonionic surfactant system. We use two kinds of surfactant, CiPj or CiEj, both are alcohol ethers. CiPj is the abbreviation of CH3(CH2)i-1(OCH2CH(CH3))jOH, the letter i stands for the length of hydrocarbon chain, and j stands for the amount of oxypropylene group. CiEj is the abbreviation of CH3(CH2)i-1(OCH2CH2)jOH, the letter i also stands for the length of hydrocarbon chain, while j stands for the amount of oxyethylene group. We put the sample into the thermostatic water bath, waiting for its equilibrium and observe the phase behavior. Then, we use gas chromatography to analyze each phase’s composition, and plot the results on the ternary diagram. We found out for water + n-decane + C6E2 at 283.15 K and 293.15 K, there will have a three-phase coexisting region, around that region will have three two-phase coexisting region.