Dynamic light scattering, interfacial properties, and conformational analysis of biodegradable quarternary ammonium surfactants.
Dynamic light scattering, interfacial properties, and conformational analysis of biodegradable quarternary ammonium surfactants.
复制标题
可生物降解季铵表面活性剂的动态光散射、界面性质和构象分析。
作者：
M. Pisarčik;M. Polakovičová;F. Devínsky;I. Lacko
Aggregation properties of biodegradable ammonium surfactants containing amide and ester groups in the bulk and at the air-water interface were investigated as a function of surfactant tail length m using dynamic light scattering and surface tension experimental methods. The results indicate that surfactants containing an ester group in the structure display higher aggregation ability in the volume and form more densely packed layer of molecules at the air-water interface than those with an amide group. The results of physical measurements were correlated with 3D models of respective surfactant molecules. As the results indicate, a surfactant molecule headgroup containing an ester group shows higher flexibility than that with an amide group in its structure, which is documented by somewhat smaller headgroup size and denser packing at the air-water interface.
