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Citation: ZHANG Hong-Lin, YAN Yong-Mei, KONG Zhe. Microcalorimetric Study of Influence of Alcohols on Critical Micelle Concentration and Thermodynamic Property of Non-Aqueous Micelle Solutions[J]. Chinese Journal of Applied Chemistry, ;2007, 24(5): 599-601. shu

Microcalorimetric Study of Influence of Alcohols on Critical Micelle Concentration and Thermodynamic Property of Non-Aqueous Micelle Solutions

1.
College of Chemical Science, Qufu Normal University, Qufu 273165

Corresponding author: ZHANG Hong-Lin,
Received Date: 10 June 2006
Available Online: 30 December 2006
Fund Project: 山东省自然科学基金资助(Y2006B13) (Y2006B13)

The power-time curves of the micelle formation process were determined with microcalorimetry for sodium laurate sdution in N,N-dimehyl acetamide containing cosurfactant (heptanol,octanol,nonanol and decanol).The critical micelle concentration (CMC) and ΔH_m^θ were measured,and ΔG_m^θ and ΔS_m^θ were calculated.The relationship between the carbon number of the alcohol,the alcohol concentration and the thermodynamic properties (CMC,ΔH_m^θ,ΔG_m^θ and ΔS_m^θ) were discussed.For the N,N-dimethyl acetamide solution of sodium laurate,the CMC decreased with the increase of the carbon number of the alcohol,and increased with the increase of the alcohol concentration.The micelle formation process is an exothermic process,and -ΔH_m^θ increased with the increase of the carbon number of the alcohol,and the alcohol concentration.
- sodium laurate,
- alcohol,
- non-aqueous solution,
- critical micelle concentration,
- thermodynamic function,
- microcalorimetric method
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