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Citation: WANG Huimin, WANG Zhongni, ZHOU Wu, WU Tonghao. Effect of Tween on the Formation of Micelle with Oleylpolyoxyethylene(10)[J]. Chinese Journal of Applied Chemistry, ;2012, 29(9): 1053-1059. doi: 10.3724/SP.J.1095.2012.00490 shu

Effect of Tween on the Formation of Micelle with Oleylpolyoxyethylene(10)

1.
Engineering Research Center of Pesticide and Medicine Intermediate Clean Production, Ministry of Education, College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China

Corresponding author: WANG Zhongni,
Received Date: 7 November 2011
Available Online: 13 January 2012
Fund Project: 国家自然科学基金(31071603)资助项目 (31071603)

The molecular interaction parameter(β^m),molecular exchange energy(ε_m) and thermodynamic parameters(ΔG_m^o,ΔH_m^o,ΔS_m^o) of mixed micelle for the binary systems of polyoxyethylene(20) sorbitan ester(Tween) and oleylpolyoxyethylene(10)(Brij97) were calculated from surface tension data.The effects of the molecular structure of Tweens,the compositions of the mixed system and the temperature were discussed.For the systems investigated,it has been showed that the synergism and molar fraction of Tween(X₁^m) in mixed micelles increase with the increase of carbon chain of Tween.The larger the molar fraction of Tween(α₁) is,the greater the free energy(ΔG_m^o) in Tween60/Brij97 mixed surfactants.At α₁≤0.33,the mixtures show synergism at mixed micelle formation,while mixtures do not have synergism with α₁>0.33;the critical micelle concentration,free energy and synergism in Tween60/Brij97 mixed micelle decrease as the temperature increase,but the enthalpy and entropy are reverse.
- mixed micelle,
- interaction parameter(β^m),
- molecular exchange energy(ε_m),
- thermodynamic parameters(ΔG_m^o,ΔH_m^o,ΔS_m^o)
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