【摘要】 高黏度油田采出水通常呈现乳浊液的状态，难以实现油水分离。本文采用共沉淀法制备Fe₃O₄纳米颗粒，在超声波辅助下将聚多巴胺（PDA）与纳米Fe₃O₄键合，制得Fe₃O₄/PDA复合材料，并采用FTIR、显微镜、物理吸附仪等表征。在交变磁场作用下，实现油田采出水破乳，达到油水分离的目的。并考察了Fe₃O₄/PDA复合材料稳定循环使用次数、交变磁场频率对回收油相效率的影响。结果表明，在极低磁场频率6.0 Hz下，所制备材料可稳定循环使用11次，为油田采出水重复利用和高附加值油相的回收利用提供了有效、便捷的方法。更多还原

【Abstract】 High viscosity produced water in oil fields is always in the state of emulsion,which makes it difficult to realize the separation of aqueous and oily phases.Nano-particle Fe₃O₄ was prepared by co-precipitation method.Polydopamine was bonded to the Fe₃O₄ nanoparticle with assistance of ultrasonics.FTIR,microscopies,physisorption were utilized to characterize the properties of Fe₃O₄/PDA composite material.The practical application was carried out to determine the separation efficiency and recycle time of the nanoparticle,whose results indicated that Fe₃O₄/PDA could break emulsification effectively and was reused for 11 times without decreasing the separation effect under the 6.0 Hz alternating magnetic field.It is concluded that Fe₃O₄/PDA could offer a valid,convenient and eco-friendly approach to processing the produced water and recovering the high-value oil in wastewater.更多还原