常规分布脂肪醇聚氧乙烯醚磷酸酯中分子间相互作用

Intermolecular interactions in convention-distribution fatty alcohol polyoxyethylene ether phosphates

为了研究常规脂肪醇聚氧乙烯醚磷酸酯(C-AEP)中分子间的相互作用,探索窄分布醇醚磷酸酯与常规醇醚磷酸酯(N-AEP)的差异。使用N-AEP混合体系模拟了常规醇醚磷酸酯,分别测定了样品的分子量分布、胶束反离子常数、静态表面张力,使用胶束理论考察了混合体系中不同EO加和数的AEP分子间的相互作用关系。发现混合体系中具有不同EO加和数的AEP在形成胶束、降低表面张力的效率和能力方面基本都表现出了增效关系。使用临界堆积参数理论预测了AEP分子的聚集形态,并使用透射电子显微镜加以验证。未发现EO加和数与聚集体的形貌和尺寸之间的明显规律。

In order to investigate the intermolecular interactions in convention-distribution fatty alcohol polyoxyethylene ether phosphates(C-AEP),explore the difference between narrow-distribution fatty alcohol ether phosphates(N-AEP)and convention distribution fatty alcohol ether phosphates.The convention-distribution fatty alcohol ether phosphate was simulated by narrow-distribution fatty alcohol ether phosphates mixed system.The molecular weight distribution,micelle counterion constant and static surface tension of the sample were determined.The micelle theory was used to investigate the interaction between AEP molecules with different EO addition numbers in the mixed system.It was found that AEP with different EO addition number in the mixed system showed a synergistic relationship in terms of the formation of micelles and the reduction of surface tension efficiency and ability,except AEP with a larger EO addition number did not show a synergistic relationship when forming micelles.The aggregation morphology of AEP molecules was predicted using critical packing parameter theory and verified using transmission electron microscopy.No significant difference between the number of EO additions and the morphology and size of the aggregates was found.