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Citation: Huang Yao-Xiong. Effect of Salt on the Phase Separation of C₈-Lecithin Micellar Solutions[J]. Acta Physico-Chimica Sinica, ;1997, 13(02): 134-139. doi: 10.3866/PKU.WHXB19970207 shu

Effect of Salt on the Phase Separation of C₈-Lecithin Micellar Solutions

Huang Yao-Xiong

1.
Department of Physics,Sun Yat-Sen University of Medical Sciences,Guangzhou 510089

Received Date: 5 July 1996
Available Online: 15 February 1997

According to the phenomenon theory of micellar solution, the Gibb's free energy of salt added C8-lecithin micellar solutions is deduced using Debye-Huckel's and Kirkwood's theories of electrolytes. The mechanism of ion-amphiphilic molecule interaction, and the variation of the critical temperature of phase separation in the solutions vs ionic strength are also described with the Gibb's free energy model. The model consists of a linear term of ionic strength, contributed from ion-dipole interaction, and a square root term of ionic strength, contributed from ion-ion interaction. A formula which describes the critical temperature of phase separation is also deduced from the Gibb's free energy model. The formula appears as, T’c=Tc- A1I1/2+A2I ,and agrees well with the experimental data of both monovalent and divalent salt added micellar solutions.
- C₈-lecithin,
- Salt,
- Phase separation,
- Gibbs free energy
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Effect of Salt on the Phase Separation of C8-Lecithin Micellar Solutions

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Effect of Salt on the Phase Separation of C₈-Lecithin Micellar Solutions