文献类型：期刊文献

英文题名：Study of CMC and thermodynamic properties on formation micelle of 1-phenyl-3-methyl-4-benzoyl-pyrazolane-5 salts in the organic solvent+sec-octyl alcohol systems at 298.15 K using a microcalorimetric method

作者：Zhang, Xu[1]

机构：[1] State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2011

卷号：32

期号：3

起止页码：299

外文期刊名：Journal of Dispersion Science and Technology

收录：EI(收录号：20110913703122)

语种：英文

外文关键词：Lithium - Carbon - Micelles - Organic solvents - Critical micelle concentration - Paraffins - Thermodynamic properties - Potassium

摘要：The power-time curves of the micelles formation process for quasi-surfactant (1-phenyl-3-methyl- 4-benzoyl-pyrazolane-5 lithium, 1-phenyl-3-methyl-4-benzoyl-pyrazolane-5 sodium, 1-phenyl-3- methyl-4-benzoyl-pyrazolane-5 potassium) and organic solvent (octane, decane, dodectane, tetradecane, and hexadecane) with sec-octyl alcohol systems were determined using titration microcalorimetry. From the data and the area of the power-time curves, the critical micelle concentration (CMC), aggregation numbers (n), and thermodynamic functions (ΔrHθm, ΔrGθm, ΔrSθm) are obtained. The relationships between the carbon numbers of alkane with the CMC and the thermodynamic properties are discussed. It could be concluded that the values of CMC and ΔrG0m decreased with the increment of the carbon number of alkane. The values of n, ΔrH0m and ΔrS0m increased with the increment of carbon number of alkane. For ΔrH0m and ΔrG0m, the relative order was demonstrated as PMBP Li>PMBP Na>PMBP K; for CMC, n, and ΔrS0m, the relative order was demonstrated as PMBP K >PMBP Na >PMBP Li at the same carbon number of alkane. ? Taylor & Francis Group, LLC.