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Temperature-induced Sedimentation to Dispersion of Ionic Vesicles

Temperature-induced Sedimentation to Dispersion of Ionic Vesicles

Hideya Kawasaki, Masahiko Miyahara, Mats Almgren, Göran Karlsson, Hiroshi Maeda

J Colloid Interface Sci. 2005 Apr 1;284(1):349-53.

PMID: 15752823

Abstract:

We present a temperature-induced sedimentation/dispersion transition of ionic vesicles in the system of alkyldimethylamine oxide hemihydrochloride (CnDMAO.1/2HCl) with a hydrocarbon chain length of 12-16 (n = 12, 14, and 16) and sodium 2-naphthalenesulfonate (NaNphS). The temperature-sensitive sedimentation/dispersion of ionic vesicles took place around a temperature of 50 degrees C, which was weakly dependent on the alkyl chain length. The combined effect of the thermally induced dissociation of the counterions from the vesicle and a hydrogen bonding between the nonionic and the cationic head groups is likely to be responsible for this unique behavior.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP532025	Sodium 2-naphthalenesulfonate		532-02-5	Price

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