Physicochemical studies on the interfacial and aggregation behavior of immidazolium- and pyrrolinidium-dodecyl sulfate in aqueous medium
作者:Manas Kumar Mandal、Manas Barai、Emili Manna、Habiba Sultana、Raja Ghosh、Dulal Musib、Kaushik Nag、Amiya Kumar Panda
DOI:10.1016/j.molliq.2021.116363
日期:2021.9
proposition. Aggregation number (n) and size (dh) of the micelles were determined by fluorescence quenching and dynamic light scattering studies respectively; both ‘n’ and ‘dh’ values were higher for SAILs than SDS ([bmim]DS > [bmp]DS > SDS). SAIL aggregates, although larger in size with higher aggregation number, were more compact than SDS micelles. Enthalpies of micellization, being exothermic in nature
通过化学计量混合离子液体,合成无盐表面活性离子液体(SAIL),1-丁基-3-甲基咪唑十二烷基硫酸盐([bmim] DS)和N-丁基-N-甲基吡咯烷鎓十二烷基硫酸盐([bmp] DS)。 IL)和十二烷基硫酸钠(SDS)。通过FTIR,1 H NMR,13对SAIL进行了表征C NMR和热重分析以及差热分析(TGA-DTA)。通过表面张力,电导,紫外可见吸收,发射光谱,动态光散射和等温滴定量热法研究了SAIL的界面和聚集行为。将结果与前体表面活性剂SDS进行了比较。表面活性剂的临界胶束浓度(CMC)遵循以下顺序:SDS> [bmp] DS> [bmim] DS。帆下表面过剩值是由于IL阳离子和DS之间的静电相互作用- ,除了DS的较高的水溶性-,由IL阳离子诱导。胶束化的负吉布斯自由能和更高比例的抗衡离子结合值进一步支持了这一主张。通过荧光猝灭和动态光散射研究分别确定了胶束的聚集数(n)和大小(d