School of Petroleum Engineering, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Huadong), Qingdao, Shandong, 266580, People's Republic of China.
J Phys Chem B. 2013 Aug 29;117(34):9922-8. doi: 10.1021/jp404387d. Epub 2013 Aug 20.
Micelles formed by fluorocarbon surfactant N-(2-hydroxypropyl)perfluorooctane amide in aqueous solution were studied through surface tension, dynamic light scatting (DLS), isothermal titration calorimetry (ITC), and dissipative particle dynamic (DPD) simulations. Through surface tension measurements, the effectiveness of surface tension reduction, the maximum surface excess concentration, and the minimum area occupied per surfactant molecule at the air/water interface were investigated. The critical micelle concentration (cmc) at different temperatures and a series of thermodynamic parameters (ΔG(m)0, ΔH(m)0, ΔS(m)0, ΔG(ads)0, ΔH(m)(A) and ΔC(p(m))0) of micellization were evaluated. The thermodynamic parameters showed that the micelle formation was entropy-driven. The micelle formation was also confirmed by ITC and DLS. In addition, the DPD simulations were conducted to simulate the whole process of micelle formation to make micelle formation better understood.
在水溶液中，通过表面张力、动态光散射（DLS）、等温热力学滴定（ITC）和耗散粒子动力学（DPD）模拟研究了全氟辛基酰胺 N-（2-羟丙基）氟碳表面活性剂形成的胶束。通过表面张力测量，研究了表面张力降低的效率、空气/水界面上的最大表面过剩浓度和每个表面活性剂分子的最小占有面积。评估了不同温度下的临界胶束浓度（cmc）和一系列热力学参数（ΔG(m)0、ΔH(m)0、ΔS(m)0、ΔG(ads)0、ΔH(m)(A)和ΔC(p(m))0）。热力学参数表明，胶束形成是熵驱动的。ITC 和 DLS 也证实了胶束的形成。此外，还进行了 DPD 模拟以模拟胶束形成的整个过程，以便更好地理解胶束形成。
