| CTAB/CnH2n+1OH/H2O体系的热力学和电化学性质 |
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| 引用本文： | 郭荣,沈明,刘天晴.CTAB/CnH2n+1OH/H2O体系的热力学和电化学性质[J].物理化学学报,1999,15(3):269-273. |
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| 作者姓名： | 郭荣 沈明 刘天晴 |
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| 作者单位： | Department of Chemistry,Teacher's College,Yangzhou University,Yangzhou 225002 |
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| 摘 要： | 微乳液通常由表面活性剂、助表面活性剂、油和水等四组分自发生成,注意到表面活性剂、助表面活性剂和水三组分体系与上述四组分体系在相行为及其物理化学性质上具有相似性,为方便起见,人们通常以此三组分体系为对象,研究四组分体系微乳液的有关性质,并亦将其称为微乳液1].另一方面,助表面活性剂一般为具有中等碳链长度的直链饱和一元醇,但实验已经发现,即使是像乙醇这样的短链醇,也能以相当数量存在于胶束栅栏中形成膜相2],或存在于两亲双层中形成层状液晶3].本文以热力学方法与无探针循环伏安法研究了直链饱和一元醇对ＣＴＡＢ/醇(Ｃ2Ｈ…
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| 关 键 词： | 胶束 微乳液 分配系数 增容自由能 第二CMC |
| 收稿时间： | 1998-03-16 |
| 修稿时间： | 1998-06-01 |
Thermodynamical and Electrochemical Properties of CTAB/CnH2n+1OH/H2O System |
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| Guo Rong,Shen Ming,Liu Tiangqing.Thermodynamical and Electrochemical Properties of CTAB/CnH2n+1OH/H2O System[J].Acta Physico-Chimica Sinica,1999,15(3):269-273. |
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| Authors: | Guo Rong Shen Ming Liu Tiangqing |
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| Institution: | Department of Chemistry,Teacher's College,Yangzhou University,Yangzhou 225002 |
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| Abstract: | Distribution coefficient K of C n H 2 n +1 OH between micellar phase and water phase in CTAB/C n OH/H 2O O/W system increases with the increase of alcohol chain length. The relationship between solubilization Gibbs free energyΔGmΘ(A) of alcohol in CTAB micellar system and alcohol chain length( n C.) is given by an equation,viz: ΔGmΘ(A) = -6.82-1.175 n C. The measurement of cyclic voltammetry shows that the second cmc of CTAB reduces with the addition of alcohol and the increase of alcohol chain length, which is advantageous to the CTAB micelle sphere to rod transition. |
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| Keywords: | Micelle Microemulsion Distribution coefficient Solubilization Gibbs free energy Second CMC |
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