Molecular dynamics simulation study on behavior of modified polyacrylamide reducing oil-water interfacial tension

被引：0

作者：

Yan Y. ^{[1
]}

Hao Y. ^{[1
]}

Yi Z. ^{[2
]}

Li Y. ^{[2
]}

Zhang J. ^{[1
]}

Li Z. ^{[1
]}

机构：

[1] School of Materials Science and Engineering in China University of Petroleum (East China), Qingdao

[2] Beijing Research Institute of Chemical Industry, SINOPEC, Beijing

来源：

Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2024年 / 48卷 / 03期

关键词：

interfacial tension; modified polyacrylamide; molecular dynamics simulation;

D O I：

10.3969/j.issn.1673-5005.2024.03.024

中图分类号：

学科分类号：

摘要：

Molecular dynamics simulation method was used to investigate the interfacial activity of partially hydrolyzed polyacrylamide (HPAM) and modified HPAM at the atomic and molecular level. The results show that the ability of HPAM to reduce the oil-water interfacial tension is extremely limited, while the HPAM with hydrophobic groups has a better effect on reducing the interfacial tension. The hydrophobic groups in the modified HPAM enhance the interaction with the oil phase, and form a dense polymer film at the interface, which can increase the thickness of the oil-water interface layer, isolate the oil-water phase contact, thereby reducing the interfacial tension formed by the oil-water contact. The presence of salt ions increases the oil-water interfacial tension. The sulfonic acid group introduced by modified HPAM has better salt resistance, which can reduce the aggregation of salt ions at the interface, thereby weakening the effect of salt ions on the interfacial tension. © 2024 University of Petroleum, China. All rights reserved.

引用

页码：215 / 220

页数：5

共 21 条

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