利用双极化干涉法研究聚合物与原油的相互作用

Insight into Interactions between Polymer and Crude Oil with Dual Polarization Interferometry

孙刚

SUN Gang

利用双极化干涉法研究了三种丙烯酰胺类聚合物与在芯片上涂敷的大庆原油间的相互作用，考察了聚合物浓度、聚合物分子结构对油膜质量、厚度、密度的影响，提出了两亲聚合物表面活性剂与原油相互作用过程中存在物理吸附、全面覆盖、胶束沉积、原油增溶、“裹挟”剥离五阶段模型。研究结果表明：盐水对芯片上原油油膜质量影响极小；两亲聚合物表面活性剂PAM1 能显著增加原油薄膜质量和厚度，并降低油膜密度，其所形成的聚合物胶束的疏水内核能增溶和“裹挟”原油，PAM1 浓度越大，与原油的相互作用越强烈。PAM2 含有AMPS大侧基结构单元且亲水性较强，只能吸附在油膜表面。部分水解聚丙烯酰胺PAM3 分子结构中仅含亲水结构单元，与原油无明显的相互作用。图17参17

Dual polarization interferometry was used to investigate the interaction between typical Daqing crude oil and three acrylamide-based polymers，and the effects of polymer concentrations and structures on the mass，thickness and density of oil films were examined. A five-stage model，including physical absorption，high coverage，deposition of polymer micelles，solubilization of crude oil and encapsulation of oil drops was proposed for the interaction between amphiphilic polymer and oil . It was found that NaCl solution has a negligible effect on mass of oil film. The mass and thickness of oil film increased and the density of oil film decreased after eluted with the amphiphilic polymeric surfactant PAM1 solution，because the formed polymer micelles could dissolve oil and carry it away from oil film. The higher the concentration of PAM1 was，the stronger the interaction was. PAM2， bearing a side unit of 2-Acryloylamino-2-methyl-1-propanesulfonic acid，could only adsorb onto the surface of oil film；while PAM3，a common HPAM，showed no interaction with crude oil owing to its strong hydrosolubility.

10.19346/j.cnki.1000-4092.2017.02.020