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Interaction of nonionic surfactant AEO9 with ionic surfactants

  • Materials and Chemical Engineering
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Abstract

The interaction in two mixtures of a nonionic surfactant AEO9(C12H25O(CH2CH2O)9H) and different ionic surfactants was investigated. The two mixtures were AEO9/sodium dodecyl sulfate (SDS) and AEO9/cetyltrimethylammonium bromide (CTAB) at molar fraction of AEO9,\(\alpha _{AEO{}_9} = 0.5\). The surface properties of the surfactants, critical micelle concentration (CMC), effectiveness of surface tension reduction γCMC, maximum surface excess concentration (Γmax) and minimum area per molecule at the air/solution interface (A min) were determined for both individual surfactants and their mixtures. The significant deviations from ideal behavior (attractive interactions) of the nonionic/ionic surfactant mixtures were determined. Mixtures of both AEO9/SDS and AEO9/CTAB exhibited synergism in surface tension reduction efficiency and mixed micelle formation, but neither exhibited synergism in surface tension reduction effectiveness.

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Authors and Affiliations

  1. Department of Chemical Engineering, Zhejiang University, 310027, Hangzhou, China

    Zhang Zhi-guo & Hong Yin

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  1. Zhang Zhi-guo
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  2. Hong Yin
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Correspondence to Zhang Zhi-guo.

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Project (No. 2004C31058) supported by the National Natural Science Foundation of China

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Zhang, Zg., Yin, H. Interaction of nonionic surfactant AEO9 with ionic surfactants. J Zheijang Univ Sci B 6, 597–601 (2005). https://doi.org/10.1631/jzus.2005.B0597

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  • DOI: https://doi.org/10.1631/jzus.2005.B0597

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