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| Aggregate morphology of gemini surfactant of alkylbene sulfonatein aqueous solution |
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WANG Yu1,ZHENG Xiao-yu2,LI Dong-wen1,JIANG Qing-zhe2,WU Yun-qiang1
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(1. Exploration and Development Research Institute of Xinjiang Oilfield Branch Company, Karamay 834000, China;2. College of Chemistry and Chemical Engineering in China University of Petroleum, Beijing 102249，China)
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| Abstract: |
| The aggregate morphology of gemini surfactants of alkylbene sulfonate DSDBS-2 was investigated by means of dynamic light-scattering ( D15) , transmission electron microscopy( TEM ) and freeze-fracture transmission electron microscopy (FF-TEM). The results show that when the mass fraction of DSDBS-2 is 10 一 15 times critical micellar concentrationT spheroidal micelles, rod-micelles，prolate-ellipsoid micelles and vesicles coexist，and the particle size range is mainly from 50 to 75 nm. Many vesicles are formed when the mass fraction of DSDBS-2 is 20 times critical micellar concentration. By heating to 60 ^ and dispersing with ultrasonic，the amount of vesicles reduced largely when the mass fraction of DSDBS-2 is 200 times critical micellar concentration. The special aggregation shape of DSDBS-2 formed at lower concentration is correspond to its unique structure. |
| Key words: dynamic light-scattering transmission electron microscopy freeze-fracture transmission electron microscopy aggregate morphology vesicles |
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