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2012•Journal of Jinggangshan UniversityRequires access

DETERMINATION OF THE MICELLE AGGREGATION NUMBER OF GEMINI CATIONIC SURFACTANTS

Xiǎo Zhang

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Abstract

The micelle aggregation number(Nagg) of Gemini cationic surfactants N,N'-alkyl-2-hydroxyl-N,N,N',N'-tetramethyl diamonium dichloride(abbreviated as GCnNCl2,n =12,14,16),was determined by steady-state fluorescence measurements in the temperature range of 20~35 oC,the pyrene as the fluorescence probe and diphenyl ketone as the quencher.The results indicated that Nagg of GCnNCl2 increases linearly with the increasing surfactant concentration within a certain concentration range,but the micropolarity of pyrene decreases with the increasing concentration.

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What this paper is about

The micelle aggregation number(Nagg) of Gemini cationic surfactants N,N'-alkyl-2-hydroxyl-N,N,N',N'-tetramethyl diamonium dichloride(abbreviated as GCnNCl2,n =12,14,16),was determined by steady-state fluorescence measurements in the temperature range of 20~35 oC,the pyrene as the fluorescence probe and diphenyl ketone as the quencher.The results indicated that Nagg of GCnNCl2 increases linearly with the increasing surfactant concentration within a certain concentration range,but the micropolarity of pyrene decreases with the increasing concentration.

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Available abstract

The micelle aggregation number(Nagg) of Gemini cationic surfactants N,N'-alkyl-2-hydroxyl-N,N,N',N'-tetramethyl diamonium dichloride(abbreviated as GCnNCl2,n =12,14,16),was determined by steady-state fluorescence measurements in the temperature range of 20~35 oC,the pyrene as the fluorescence probe and diphenyl ketone as the quencher.The results indicated that Nagg of GCnNCl2 increases linearly with the increasing surfactant concentration within a certain concentration range,but the micropolarity of pyrene decreases with the increasing concentration.

Key concepts: Pyrene, Aggregation number, Cationic polymerization, Pulmonary surfactant, Chemistry, Micelle, Alkyl, Fluorescence

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