Microcalorimetric and Condutivity Studies of the Effects of Solutes on the Percolation Behavior of Reverse Micelle Systems

本研究利用高靈敏度之恆溫滴定微卡熱量計(ITC)針對以陰離子界面活性劑AOT所形成的空白W/O微乳液系統（不含溶質）和加了溶質（鹽類、胺基酸、蛋白質）並調整pH值的W/O微乳液系統對percolation現象的動態做系統性的探討。實驗結果證實以熱力學方法所得的交互作用參數(second virial coefficient)和動力學所得之電導度percolation機制有一致之結果相容性，另外，也利用黏度計對W/O微乳液系統percolation現象中黏度之變化做一研究，以期能對W/O微乳液系統percolation機制能充分了解。

關鍵字

無資料

並列摘要

This study employed high sensitivity microcalorimetry to investigate the percolation behavior of W/O microemulsions of AOT with and without solutes of salts, amino acids, and proteins. The dilution heat and the enthalpy behavior of the reverse micelle solutions in the percolation process were measured by isothermal titration microcalorimetry (ITC). The enthalpy behavior reported in this investigation supports qualitatively the association model of percolation. The second virial coefficient of the interactions between reverse micelle droplets can be derived from the information of the dilution heat of the reverse micellar system with the concentration of the reverse micelles and incorporating a hard-sphere interaction potential assumption. The derived second virial coefficients of different reverse micelle solutions are discussed along with the conductivity percolation temperature, and the difference between the interaction potentials are in good agreement with the shift of the percolation temperature of various micellar systems. Viscosity measurements were also taken from of the micellar solutions in the process of percolation in this study. A discussion on the relationship between the solute effects and the percolation in terms of the charge and the surface activity of the solutes is also included.

並列關鍵字

Percolation ； conductivity ； Microcalorimetry ； Amino Acid ； Protein ； Reverse Micelle

國際替代計量

Microcalorimetric and Condutivity Studies of the Effects of Solutes on the Percolation Behavior of Reverse Micelle Systems

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