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运用傅立叶变换红外光谱研究了钾皂化2－乙基已基磷酸单2－乙基巴基酯（简称HEHPEHE或P507）的性质，同时配合激光光散射技术研究皂化应对形成微乳液性能的影响．红外光谱的研究表明，皂化度（αs）超过60％时，（K，H）EHPEHE呈现酸盐体系的特殊性质，体系对水的增溶能力迅速增大，该体系开始具有形成微乳液的能力；αs为75％左右时，体系对水的增溶能力最强；大于75％时，随着皂化度的继续增加，体系对水的加溶能力迅速下降．激光光散射的实验结果表明，αs为75％时，微乳体系中的平均液滴半径达到最大值（103.8nm）。红外光谱的结果证明形成微乳液对HEHPEHE分子中的P－O－C、P＝O和P－O－H均与水分子有不同程度的相互作用．
The properties of potassium saponified monoethyl 2-ethylhexyl 2-ethylhexyl phosphate (HEHPEHE or P507) were studied by Fourier transform infrared spectroscopy. The effects of saponification on the formation of microemulsion were studied by laser light scattering. Infrared spectroscopy showed that (K, H) EHPEHE exhibited special properties of the acid salt system when the degree of saponification (αs) was over 60%, and its ability to solubilize water rapidly increased. The system began to have the ability to form microemulsions ; When αs is about 75%, the system has the strongest ability to solubilize water; when it is more than 75%, the system’s ability to solubilize water declines rapidly as the degree of saponification continues to increase. Experimental results of laser light scattering show that when the αs is 75%, the mean droplet radius in the microemulsion system reaches the maximum (103.8 nm). The results of FTIR showed that the formation of microemulsion had different degrees of interaction with water molecules in P-O-C, P = O and P-O-H in HEHPEHE.