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Swelling performance of sodium polyacrylate and poly(acrylamide-co-acrylic acid) potassium salt.

Balogun, Yakubu; Oluyemi, Gbenga; Njuguna, James; Mahon, Ruissein



The application of superabsorbent polymer hydrogels in the oil and gas industry for reservoir and well management is gaining more traction. In this study, the swelling performance and adsorption kinetics of two commercial superabsorbent polymer hydrogels - poly(acrylamide-co-acrylic acid) potassium salt and sodium polyacrylate - were evaluated, based upon their stimuli response to pH and salinity at varying temperature and reaction time periods. Characterisation and evaluation of the materials were performed using analytical techniques - optical microscopy, scanning electron microscopy, thermal gravimetric analysis and the gravimetric method. Experimental results show that reaction conditions strongly influence the swelling performance of the superabsorbent polymer hydrogels considered in this study. Generally, increasing pH and salinity concentration led to a significant decline in the swelling performance of both superabsorbent polymer hydrogels. An optimal temperature range between 50°C and 75°C was considered appropriate, based on swell tests performed between 25°C to 100°C over 2-, 4- and 6-hour time periods. These findings serve as a guideline for field engineers in the use of superabsorbent polymer hydrogels for a wide range of oilfield applications. The study results provide evidence that the two superabsorbent polymer hydrogels can be used for petroleum fraction-saline water emulsions separation, reservoir zonal isolation, water shutoff and cement plugging applications.


MAHON, R., BALOGUN, Y., OLUYEMI, G. and NJUGUNA, J. 2020. Swelling performance of sodium polyacrylate and poly (acrylamide-co-acrylic acid) potassium salt. SN applied sciences [online], 2(1), article ID 117. Available from:

Journal Article Type Article
Acceptance Date Dec 9, 2019
Online Publication Date Dec 19, 2019
Publication Date Jan 31, 2020
Deposit Date Dec 12, 2019
Publicly Available Date Dec 12, 2019
Journal SN applied sciences
Print ISSN 2523-3963
Electronic ISSN 2523-3971
Publisher Springer
Peer Reviewed Peer Reviewed
Volume 2
Issue 1
Article Number 117
Keywords Superabsorbent polymer hydrogels; Hydrogels; Adsorption; Swelling performance; Swelling kinetics; Material characterisation; Thermal stability; Oil and gas industry
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