Mechanism of lecithin adsorption at a liquid‖liquid interface
Mechanism of lecithin adsorption at a liquid‖liquid interface
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卵磷脂在液|液界面的吸附机理
DOI：
10.1021/jp027195c
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发表时间：
2003
影响因子：
3.3
通讯作者：
Hana Jänchenová
中科院分区：
文献类型：
--
作者：
V. Mareček;A. Lhotský;Hana Jänchenová
用循环伏安法研究了L-α-卵磷脂(二棕榈酰)在水-1，2-二氯乙烷界面上的吸附。发现在酸性介质中的伏安峰对应于卵磷脂的质子化形式的解吸。其表面浓度由吸附的卵磷脂的两性离子形式与氢离子的表面化学反应控制。整个过程由质子化形式的卵磷脂的潜在吸附/解吸平衡补充。它在有机相中的浓度受酸−碱平衡的影响。
Adsorption of l-α-lecithin (dipalmitoyl) at the water|1,2-dichloroethane interface has been studied by cyclic voltammetry. It has been found that the voltammetric peak in acidic medium corresponds to the desorption of the protonated form of lecithin. Its surface concentration is controlled by a surface chemical reaction of the zwitterionic form of adsorbed lecithin with hydroxonium ion. The whole process is complemented by the potential dependent adsorption/desorption equilibrium of the protonated form of lecithin. Its concentration in the organic phase is affected by the acid−base equilibrium.