Self-assembly and emulsions of oleic acid-oleate mixtures in glycerol
Self-assembly and emulsions of oleic acid-oleate mixtures in glycerol
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DOI：
10.1039/c0gc00452a
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发表时间：
2011-01-01
期刊：
影响因子：
9.8
通讯作者：
Douliez, Jean-Paul
中科院分区：
文献类型：
--
作者：
Delample, Mathieu;Jerome, Francois;Douliez, Jean-Paul
已知油酸和油酸钠的混合物在水中自发形成囊泡。在本文中，我们在甘油中研究了该系统，并表明它也在该溶剂中形成囊泡，但直径要小得多。甘油中的临界囊泡浓度 (cvc) (cvc = 27.1 mM) 高于水 (cvc = 0.10 mM)。使用由棕榈油酸和棕榈油酸酯制成的类似系统证实了这一发现。使用小角中子散射 (SANS) 对甘油中的囊泡进行了表征，结果表明脂肪酸嵌入在流体双层相中。这些脂肪酸分散体用于生产甘油乳液，使用十六烷作为油组分。我们表明，在甘油中产生乳液需要比在水中产生乳液更高的能量，这可能是因为甘油的粘度较高。然而，乳液在甘油中表现出稳定。总而言之，这表明超分子自组装发生在甘油中，并且可以在该溶剂中成功生产乳液。
It is known that mixtures of oleic acid and sodium oleate spontaneously form vesicles in water. In this paper, we study this system in glycerol, and show that it also forms vesicles in this solvent, but with a considerably lower diameter. The critical vesicle concentration (cvc) was higher in glycerol (cvc = 27.1 mM) than in water (cvc = 0.10 mM). This finding was confirmed using an analogous system made of palmitoleic acid and palmitoleate. The vesicles in glycerol were characterized using small-angle neutron scattering (SANS) which showed that the fatty acids are embedded in a fluid bilayer phase. These fatty acid dispersions were used to produce emulsions in glycerol, using hexadecane as the oil component. We show that a higher energy is required to produce emulsions in glycerol than in water, probably because of the higher viscosity of glycerol. However, emulsions were shown to be stable in glycerol. Altogether, this shows that supramolecular self-assembly occurs in glycerol, and that emulsions can be successfully produced in this solvent.