2026-05-07T09:45:23Z https://www.eurjchem.com/index.php/eurjchem/oai

oai:ojs.www.eurjchem.com:article/2392 2023-09-30T06:14:37Z eurjchem:ART driver

Influence of temperature and pH on polyacrylamide-based drilling fluid: Characterization and rheological study Koh, Jin Kwei Lai, Chin Wei Johan, Mohd Rafie Gan, Sin Seng Chua, Wei Wei Colloid Drilling Rheology Polymers Surface chemistry Non-Newtonian fluids Polyacrylamide (PAM) is a biodegradable polymer with good lubricity in friction reduction. However, there is insufficient guidance on the dosage of PAM and poor rheological information on the effects of temperature and pH. This study aimed to investigate the characterization of the material and rheological analysis regarding the effects of concentration, pH, and temperature of PAM. In material characterization, PAM has been shown to offer hydrophilic surfaces. In a rheological study, 1000 ppm PAM was the critical association concentration, as the rheological properties below 1000 ppm PAM were superior. This was due to the dispersion stability effect caused by the polymer concentration. Additionally, a low concentration of polymer contributes to bridging flocculation with an unstable rheological profile and low association networking. When the polymer concentration is further increased to the saturated adsorption level, the rheological profile of PAM above 1000 ppm is significantly affected as a result of the alternation from steric stabilization to depletion flocculation in a polymer system. Furthermore, the rheological performance of PAM was significantly affected by temperature and pH, showing better performance after heating to 60 °C and at pH = 10. Future studies can further develop modified PAM with specific additives at an optimized temperature and pH to investigate the rheological performance of drilling. Atlanta Publishing House LLC 2023-06-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://www.eurjchem.com/index.php/eurjchem/article/view/2392 10.5155/eurjchem.14.2.184-192.2392 European Journal of Chemistry; Vol. 14 No. 2 (2023): June 2023; 184-192 2153-2257 2153-2249 eng https://www.eurjchem.com/index.php/eurjchem/article/view/2392/pdf_2392 Copyright (c) 2023 Authors