三种长链季铵盐在低共熔溶剂中胶束结构的小角X-射线研究

Small Angle X-ray Scattering Study on the Structure of Micelle Formed by Three Cationic Quarternary Ammonium Surfactants in Deep Eutectic Solvents

通过小角X-射线散射技术,研究了十二烷基三甲基溴化铵(DTAB)、十四烷基三甲基溴化铵(TTAB)、十六烷基三甲基溴化铵(CTAB)三种阳离子季铵盐表面活性剂在ChG和ChEG低共熔溶剂中的胶束行为并表征胶束的结构。研究结果表明,表面活性剂烷基链长及低共熔溶剂类型对胶束结构影响较大,而温度对其影响较小。所得结果为低共熔溶剂中有序分子聚集体的构建提供参考。

The micellar behaviours of three cationic quaternary ammonium surfactants,dodecyltrimethylammonium bromide(DTAB),tetradecyltrimethylammonium bromide(TTAB)and cetyltrimethylammonium bromide(CTAB),were studied in deep eutectic solvents ChG and ChEG.The structure of micelles was characterized by small angle X-ray scattering.These results suggest that the structure of micelles is heavily influenced by the alkyl chain length and solvent property while barely changes with temperature.This would contribute to the construction of aggregates in deep eutectic solvents.