大庆原油含氮组分的界面扩张黏弹性质

 采用络合法和吸附色层法对大庆原油含氮组分进行了分离和富集，得到氮含量不同的2种含氮组分（以下简称 N1、N2）。采用悬挂滴方法，研究了 N1、N2在煤油-水界面上的扩张流变性质，考察了扩张频率和组分浓度对扩张模量和相角的影响。结果表明，N1、N2具有相近的相对分子质量，表现出大体类似的界面扩张变化规律；但由于氮含量不同，所以具有不同的界面扩张行为。组分浓度较低时，由于 N1的氮含量较高，其分子结构中含有更多的氮杂环，活性较强，体积较大，表现为油-水界面张力较低，扩张模量较大；组分浓度较高时，由于 N2分子体积较小，在油-水界面上排列更为紧密，易于在界面与体相间发生扩散交换，表现为油-水界面张力较低，扩张模量较小。2种含氮活性组分不同的界面扩张黏弹性质可从其不同特征的微观弛豫过程得到解释。

Interfacial Dilational Viscoelasticity of Nitrogen Containing Components of Daqing Crude Oil

Two kinds of nitrogen containing components of Daqing crude oil,N1 and N2,were enriched and separated by complexation and adsorption chromatography,respectively.The dilational viscoelastic properties at kerosene-water interface containing N1 and N2 were investigated,respectively,by means of oscillating drop method.The dependencies of dilational modulus and phase angle on frequency,and N1 and N2 concentration were expounded.The experimental results showed that the interfacial dilational regularity of N1 and ...