Pereiro Ana B, Araújo João M M, Teixeira Fabiana S, Marrucho Isabel M, Piñeiro Manuel M, Rebelo Luis Paulo N
Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa , Apartado 127, 2780-157 Oeiras, Portugal.
Langmuir. 2015 Feb 3;31(4):1283-95. doi: 10.1021/la503961h. Epub 2015 Jan 22.
In this work, novel and nontoxic fluorinated ionic liquids (FILs) that are totally miscible in water and could be used in biological applications, where fluorocarbon compounds present a handicap because their aqueous solubility (water and biological fluids) is in most cases too low, have been investigated. The self-aggregation behavior of perfluorosulfonate-functionalized ionic liquids in aqueous solutions has been characterized using conductometric titration, isothermal titration calorimetry (ITC), surface tension measurements, dynamic light scattering (DLS), viscosity and density measurements, and transmission electron microscopy (TEM). Aggregation and interfacial parameters have been computed by conductimetry, calorimetry, and surface tension measurements in order to study various thermodynamic and surface properties that demonstrate that the aggregation process is entropy-driven and that the aggregation process is less spontaneous than the adsorption process. The novel perfluorosulfonate-functionalized ILs studied in this work show improved surface activity and aggregation behavior, forming distinct self-assembled structures.
在本研究中，我们对一类新型的无毒氟化离子液体（FILs）进行了研究。这类离子液体能与水完全互溶，可用于生物应用领域。在大多数情况下，碳氟化合物由于其在水（以及生物流体）中的溶解度过低而在该领域存在应用障碍。我们采用电导滴定、等温滴定量热法（ITC）、表面张力测量、动态光散射（DLS）、粘度和密度测量以及透射电子显微镜（TEM）等方法，对全氟磺酸盐功能化离子液体在水溶液中的自聚集行为进行了表征。通过电导法、量热法和表面张力测量计算了聚集和界面参数，以研究各种热力学和表面性质，结果表明聚集过程是由熵驱动的，且聚集过程的自发性低于吸附过程。本研究中所研究的新型全氟磺酸盐功能化离子液体表现出改善的表面活性和聚集行为，形成了独特的自组装结构。
