Interaction and Adsorption of Hydrophobically Modified Polyacrylamide on Silica and Asphaltene Surfaces

Author:

Zou Wenjie1ORCID,Fang Zichuan1,Zhang Zhijun2ORCID,Lu Zhenzhen3ORCID

Affiliation:

1. Civil and Resource Engineering School, University of Science and Technology Beijing, Beijing 100083, China

2. School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, China

3. Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada

Abstract

The adsorption of polymers affects the cost and oil recovery in oil reservoir exploitation and the flocculation effect in the treatment of oil sand tailings. The adhesion and adsorption of a hydrophobically modified polyacrylamide (HMPAM), i.e., P(AM-NaAA-C16DMAAC), on silica and asphaltene were investigated using surface force measurements, thermodynamic analysis and quartz crystal microbalance with dissipation (QCM-D) measurement. Our study indicates that HMPAM polymer has strong interaction with both silica and asphaltene. The adhesion force of HMPAM on silica was stronger than that on asphaltene surface. Consistently, the adsorption of HMPAM was also greater on silica surface, with a more rigid layer formed on the surface. For HMPAM/silica system, the attractive interaction and the strong adhesion are mainly driven by the hydrogen bonding and electrostatic interaction. For HMPAM/asphaltene system, it is mainly due to hydrophobic interaction between the long hydrocarbon chains of HMPAM and asphaltene. Furthermore, continuous adsorption of HMPAM was detected and multiple layers formed on both silica and asphaltene surfaces, which can be attributed to the hydrophobic chains of HMPAM polymers. This work has illustrated the interaction mechanism of HMPAM polymer on hydrophilic silica and hydrophobic asphaltene surfaces, which provide insight into the industrial applications of hydrophobically modified polymer.

Funder

National Natural Science Foundation of China

Publisher

Hindawi Limited

Subject

Polymers and Plastics,Organic Chemistry,General Chemical Engineering

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