Effect of Compressed CO2 on the Properties of Lecithin Reverse Micelles

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• 作者：Yueju Zhao ; Jianling Zhang ; Buxing Han ; Chaoxing Zhang ; Wei Li ; Xiaoying Feng ; Minqiang Hou ; Guanying Yang
• 刊名：Langmuir
• 出版年：2008
• 出版时间：September 2, 2008
• 年：2008
• 卷：24
• 期：17
• 页码：9328-9333
• 全文大小：147K
• 年卷期：v.24,no.17(September 2, 2008)
• ISSN：1520-5827

文摘

Lecithin is a very useful biosurfactant. In this work, the effects of compressed CO₂ on the critical micelle concentration (cmc) of lecithin in cyclohexane and solubilization of water, lysozyme, and PdCl₂ in the lecithin reverse micelles were studied. The micropolarity and pH value of the polar cores of the reverse micelles with and without CO₂ were also investigated. It was found that CO₂ could reduce the cmc of the micellar solution and enhance the capacity of the reverse micelles to solubilize water, the biomolecule, and the inorganic salt significantly. Moreover, the water pools could not be formed in the reverse micelles in the absence of CO₂ because of the limited amount of water solubilized. However, the water pools could be formed in the presence of CO₂ because large amounts of water could be solubilized. All of these provide more opportunity for effective utilization of this green surfactant. The possible mechanism for tuning the properties of the reverse micelles by CO₂ is discussed.