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Citation: Chen Qi-Bin, Dong Ya-Ming, Liu Hong-Lai, Hu Ying. Observation of the Domain Morphology of Gemini Surfactant at an Air/Liquid Interface Using BAM[J]. Acta Physico-Chimica Sinica, ;2003, 19(11): 1069-1072. doi: 10.3866/PKU.WHXB20031117 shu

Observation of the Domain Morphology of Gemini Surfactant at an Air/Liquid Interface Using BAM

1.
Department of Chemistry, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai　200237

Received Date: 29 April 2003
Available Online: 15 November 2003

The surface pressure-area per molecule isotherm of Gemini surfactant [propilidene-1,3- bis(dimethyloctadecylammonium bromide), PBDOAB] at an air/liquid interface of 0.005 mol•L-1 aqueous NaBr solution has been measured. The cross-sectional area of PBDOAB at the air/liquid interface has been obtained. Domain morphology formed by PBDOAB at the air/liquid has been investigated via BAM. Results show that PBDOAB forms condensed monolayer; that the circular domain morphology has been observed and that in the circular domains the molecular orientations of the PBDOAB is of central symmetry at the air/liquid interface of the aqueous NaBr solutions. It is proved that the chemical structure of Gemini surfactants strongly influences their properties at the air/liquid interface.
- Gemini surfactant;Interface;Brewster angle microscope(BAM);Domain morphology;Monolayer
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