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Giant Brainlike Aggregates from New Fluorocarbon/Hydrocarbon Hybrid Cationic Surfactants

A rapid synthetic procedure in two steps from perfluoroalkylethyl iodide derivatives led to 18 novel ammonium type hybrid surfactants of the general formula: RF(CH2)2S(CH2)2N þ (CH3)2RHBr- (RF=C4F9, C6F13, C8F17; RH=C4H9, C6H13, C8H17, C10H21, C12H25, C14H29). These hybrid surfactants exhibited very low surface tension (from 16 to 25 mN/ m) as well as low critical micellar concentration until 1.5  10-5 mol/L. A special focus was made on aggregation phenomenon as giant multilamellar “brainlike” vesicles were observed via cryogenic scanning electron microscopy (cryoSEM) and transmission electron microscopy (TEM; with a contrast agent) suggesting a high encapsulation ability and a very important specific surface of these particular organizations.

Auteur(s) : M.Oumar, Givenchy, S.Y.DIENG, S.Amigoni and F.Guittard Langmuir 2011,27(5), 1668-1674
Pages : 1668-1674
Année de publication : 2011
Revue : Langmuir
N° de volume : 27(5)
Type : Article
Mise en ligne par : DIENG Samba