纳米聚丙烯酰胺微球流变与溶胀性能研究  

Rheological and Swelling Properties of Polyacrylamide Nanospheres

作　　者：刘晓非[1] 戚佩瑶 程辰 田军鹏 王硕[1] 唐忠利[3] 郑力军[2] Liu Xiaofei;Qi Peiyao;Cheng Chen;Tian Junpeng;Wang Shuo;Tang Zhongli;Zheng Lijun(School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China;PetroChina Company Limited,Xi’an 710018,China;School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学材料与工程学院,天津300350 [2]中国石油天然气股份有限公司,西安710018 [3]天津大学化工学院,天津300350

出　　处：《天津大学学报（自然科学与工程技术版）》2021年第9期950-955,共6页Journal of Tianjin University：Science and Technology

摘　　要：为提高采油率,纳米聚丙烯酰胺微球因其优异的堵水性能和深层剖面控制性能而被用作深层驱油剂.通过测定其纳米流体在不同条件下的表观黏度,研究了温度、质量浓度和矿化度对纳米聚丙烯酰胺微球溶液流变性能的影响.结果表明:温度升高,溶液的表观黏度降低,在极低的剪切速率下由于微球团聚,会出现剪切变稠现象;随着矿化度的增加,溶液的表观黏度降低.通过考察聚丙烯酰胺微球透过滤膜的能力,研究了纳米级微球粒子在水中的溶胀性能和团聚行为.结果表明:随着时间的延长,不同粒径的微球均表现出一定的溶胀性能和团聚现象;这种溶胀和团聚现象,除了会提供一定的封堵效果,还能改善流动阻力,进而提高水驱波及效率.To enhance oil recovery,polyacrylamide nanospheres are widely utilized as in-depth flooding agents because of their excellent performances of plugging and deep profile control.The effects of temperature,mass concentration,and salinity on the rheological behaviors of polyacrylamide microsphere dispersion were studied by measuring the apparent viscosity under different conditions.The results showed that the apparent viscosity decreased with increasing temperature.For the agglomeration of microspheres,the solution exhibited a shear thickening behavior in very low shear rates;as salinity increased,the apparent viscosity of the solution decreased.By investigating the ability of polyacrylamide nanospheres to penetrate the filter membrane,the swelling property and agglomeration of nanoscale microspheres in water were studied.The results indicated that with increasing time,microspheres with different particle sizes all exhibited swelling and agglomeration behavior.This phenomenon of swelling and agglomeration,in addition to providing a certain plugging effect,may also improve the flow resistance,and consequently increase the sweeping efficiency.

关 键 词：聚丙烯酰胺 纳米粒子 流变学 黏度 溶胀 团聚 

分 类 号：TQ317.4[化学工程—高聚物工业] O631.3[理学—高分子化学]