COLL 37 |
| The solubilization of polar oils in microemulsions could be considerably enhanced by using so-called extended surfactants which contain a slightly polar but mainly lipophilic spacer arm between the conventional hydrophilic head and lipophilic tail. Provided that the spacer arm is adjusted to play a lipophilic linker role, these molecules are able to cosolubilize 20-25 times their weight of water and polar oil. The first generation of alkyl polypropyleneoxide sulfate species allowed to deduce the main characteristics of these surfactants, particularly the effect of the spacer arm length on the solubilization of different kinds of oil such as ethyl oleate, natural and synthetic triglycerides and long alkanes. Other head groups such as C6 and C5 sugar, carboxylate and combined heads with several groups, linked with fatty ester tails, exhibit similar properties with more friendly attributes for detergency, biological and health care applications. |
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Surfactants from Renewable Resources
2:00 PM-4:50 PM, Sunday, April 6, 2008 Morial Convention Center -- Rm. 225, Oral
Division of Colloid & Surface Chemistry |