交联聚合物微球分散体系封堵性能

Plugging property of linked polymer micro-spheres dispersed system

关键词:  交联聚合物微球  核孔膜  封堵  水化时间

Key words:  linked polymer micro-spheres  nuclear pore film  plugging  hydration time

摘要:

用低压差核孔膜过滤实验、动态光散射实验和填充砂管实验对交联聚合物微球分散体系的封堵性能及其影响 因素进行了研究。结果表明:交联聚合物微球分散体系可以对1.2 p的核孔膜形成有效封堵，而聚丙烯酰胺溶液 (HPAM)基本不对核孔膜产生封堵;随着水化时间的增加，微球分散体系通过1.2 (un核孔膜的过滤速率逐渐减小， 对核孔膜的封堵程度逐渐增强,15 d时封堵性能最好;随着NaCl质量分数的升高,微球分散体系的粒径逐渐减小,封 堵性能也逐渐减弱；随着微球质量分数的增大，微球分散体系对1. 2 jun核孔膜形成的封堵性能增强;随着水化温度 的升高，微球分散体系的溶胀速度加快,封堵能力减弱;交联聚合物微球分散体系能够进人填充砂管中深部,具有较 好的深部运移能力和封堵能力。

Abstract:

The plugging property and the affecting factors of linked polymer micro-spheres dispersed system were studied by using nuclear pore film under low pressure, dynamic light scattering ( DLS) and sand pack core displacing instrument. The results show that under the same experimental condition，the dispersed system had the better plugging efficiency than HPAM in nuclear pore film of 1. 2 fiin . The filtrate velocity of the micro-spheres dispersed system through nuclear pore film of 1.2 [jun decreased with the hydration time increasing, the plugging degree of the dispersed system increased, and the plugging degree was the best on the 15th day- The plugging property of the dispersed system was related to NaCl concentration, the plugging efficiency of the dispersed system slightly decreased with NaCl concentration increasing and the size of the dispersed system decreased. The plugging efficiency of the dispersed system increased with micro-spheres concentration increasing. Tlie swelling rate increased and the plugging efficiency of the dispersed system was lessened with hydration temperature increasing. The results show that the dispersed system could enter into the mid-depth of the sand pipe and had the better blocking property and deep migratory capability-