纳米阳离子微球与HPAM的相互作用

Interaction Between Cationic Microsphere with HPAM

采用微乳聚合法制备一系列不同阳离子度的微球与HPAM复合形成一种新型调剖剂，通过透射扫描电镜及激光粒度分析测定出合成微球的初始粒径在50—100nm，水中膨胀后的粒径为l-3μm；使用微电泳仪分析了微球的表面电势，在阳离子度30％时达到最大；由于静电作用，阳离子微球和HPAM浓度在0．02％即发生絮凝反应；通过不同剪切下的粘度测定，发现静电作用可以大幅度提高体系的粘度；增~HPAM的水解度可以将体系粘度再提高约20％。岩心驱替实验表明，复合体系具有较好的调剖性能。

Taken a different series of cationic microsphere and HPAM to composite synthesize a new type of profile modification agent by microemulsion polymerization,the radii of original and swellable panicle in water analyzed by Transmission scan electron microscope and laser particle sizer were 50-100nm and 1-3μm respectively; The surface potential attains a maximum at cationic degree 30% by micro-electrophoresis analysis, due to electrostatic effect,[0] the cationic microsphere and HPAM occurred flocculation reaction when the concentration was 0.02%. Measured under different shear viscosity, the electrostatic effect could enhanced the viscosity of the system significantly.Moreover, by increasing hydroly- sis degree of HPAM, the system viscosity is furtherly improved by 20%.The coreflood experiments showed that compound system had better profile modification performance.