Authors
Funsho Afolabi, Zulhelmi Amir, Muhamad F A Patah, Iskandar Dzulkarnain, Eugene N Ngouangna, Akorede O Joledo, Pearl I Murungi, Syed M Mahmood, Ahmed Halilu
Published in
Scientific reports. Jul 01, 2026. Epub Jul 01, 2026.
Abstract
Ensuring the permanent containment of CO2 in geological formations necessitates robust methods for conformance control. Lately, attention is being shifted towards the use of cheap and environmentally-friendly composite materials, wherein the stability and viscosifying power in situ remains a challenge. In this study, a family of interpenetrating network composites was formulated by crosslinking polyacrylamide in a hydrophobically-modified cellulose sulphate solution to form a gel. The stability and mechanical properties of the gel were investigated using turbidimetry and molecular dynamics simulation. The hydrophobically-modified cellulose sulphates attained reasonable stability in saline conditions typical of the subsurface environment. They had moderate compatibility with crosslinked polyacrylamide, which was further improved by guanidine hydrochloride, leading to a more cohesive interpenetrating network at a representative reservoir temperature. In the same vein, the tertiary amine salt also improved the quality of the gel after exposure to CO2, where they demonstrated enhanced thickening and elasticity with CO2 in an ionic environment. With this stability in the presence of CO2 and improved mechanical properties in situ harsh reservoir conditions, these novel interpenetrating network gels stand as a promising material for increasing CO2 storage security in subsurface formations.
PMID:
42386850
Bibliographic data and abstract were imported from PubMed on 02 Jul 2026.
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