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Calculation of the molecular exchanging energy of binary surfactants system on the surface monolayer of aqueous solution

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Abstract

By using the binary anionic/cationic surfactants system CH3(CH2)nOSO −3 /CH3(CH2)nN+(CH3)3 as an example, the molecular exchanging energy (ɛ) of adsorption on the surface monolayer of aqueous solution has been studied. ɛ can be obtained with two methods. One is from the relationship between ɛ and the molecule interaction parameter (β). This relationship is founded by considering that the adsorption of mixed surfactants on the surface monolayer of solution satisfies the dimensional crystal model condition under which β can be obtained by testing the surface tension of solution. The other is directly from the molecular structure of surfactants with the Lennard-Jones formula. The results for the studied system show that these two methods coincide well.

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Authors and Affiliations

  1. Department of Food Sciences & Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China

    Wang ZhengWu

  2. Institute of Theoretical Chemistry, Shandong University, Jinan, 250100, China

    Yi XiZhang

Authors
  1. Wang ZhengWu
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  2. Yi XiZhang
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Correspondence to Wang ZhengWu.

Additional information

Supported by the National Natural Science Foundation of China (Grant Nos. 20676051 and 20573034) and the Important Construction Project (Category A) of Shanghai Jiao Tong University (Grant No. AE 150085)

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Wang, Z., Yi, X. Calculation of the molecular exchanging energy of binary surfactants system on the surface monolayer of aqueous solution. SCI CHINA SER B 50, 468–475 (2007). https://doi.org/10.1007/s11426-007-0095-8

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  • DOI: https://doi.org/10.1007/s11426-007-0095-8

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