Effect of procaine hydrochloride on the micellization of double tailed surfactants in the aqueous solution |
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| Authors: | Jin Zhang Bin Dong Liqiang Zheng Ganzuo Li |
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| Institution: | aKey Laboratory of Colloid and Interface chemistry, Shandong University, Ministry of Education, 27 Shanda Nanlu, Jinan, Shandong 250100, China |
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| Abstract: | The effects of procaine hydrochloride (PC) on the micellization of two kinds of double tailed surfactants in aqueous solutions, sodium bis (2-ethyl-1-hexyl) sulfosuccinate (AOT) and didodecyldimethylammonium bromide (DDAB), were studied by surface tension measurements. The results revealed that PC could decrease the equilibrium surface tension and critical micelle concentration (cmc) of AOT, but it is opposite for DDAB. Their standard thermodynamic parameters of micellization,  ,  and  , have been calculated in aqueous solutions. The locations of PC in the two kinds of micelles were investigated by UV and fluorescence spectroscopy. It is found that the mixed micelle of AOT and PC could be formed, but the effect of PC on the micellization of DDAB is quite small. |
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| Keywords: | Double tailed surfactants Procaine hydrochloride Surface tension UV Fluorescence spectroscopy |
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