H_2O/KDEHP(75%)-HDEHP(25%)/n-HEPTANE微乳体系表面活性剂与水相互作用的谱学研究

FTIR and FT Raman Studies on Interactions between Water and Surfactants in Water/KDEHP(75%) HDEHP(25%)/n HEPTANE Microemulsion Systems

利用傅里叶变换拉曼光谱和傅里叶变换红外光谱对Ｈ２Ｏ／ＫＤＥＨＰ（７５％）－ＨＤＥＨＰ（２５％）／ｎ－ＨＥＰ－ＴＡＮＥ微乳体系的表面活性剂疏水链和极性头基与水分子的相互作用进行了研究。结果表明：当加水量由Ｗ０＝１增加至４３时，表面活性剂极性头基［ＰＯ２］－的反对称伸缩振动由１２３３ｃｍ－１移至１２０７ｃｍ－１，其对称伸缩振动由１０９４ｃｍ－１移至１０８９ｃｍ－１。表面活性剂疏水链的堆积结构也发生了变化，表现在拉曼光谱上为碳氢振动吸收峰的峰高比Ｉｒ（Ｉ２９６２／Ｉ２８７５），Ｉｒ（Ｉ２９３７／Ｉ２８７５），Ｉｒ（Ｉ２９１６／Ｉ２８７５）和Ｉｒ（Ｉ２９０３／Ｉ２８７５）随加水量增大而增大。结合二阶导数谱和傅里叶变换退卷积谱，本文还对ＫＤＥＨＰ和ＨＤＥＨＰ的存在状态进行了探讨，认为体系中表面活性剂分子有多种存在状态。

The conformation of the hydrocarbon chains in water/KDEHP(75%) HDEHP(25%)/ n HEPTANE microemulsion systems was studied by FT Raman spectroscopy.The increase in the intensity ratio I r (I 2 937 /I 2 875 ) showed trans to gauche transformation.The hydration of the polar heads in microemulsions was investigated by FT IR spectroscopy.Some probable structures of KDEHP and HDEHP in microemulsions were proposed.