RT Journal Article
T1 The influence of alkyl ammonium modifiers on the microstructure and high-pressure rheology of sepiolite-vegetable oil dispersions
A1 Martín Alfonso, María José
A1 Mejía, Alberto
A1 Martínez Boza, Francisco José
A1 Partal López, Pedro
AB In the context of environmental sustainability, the drilling industry faces new challenges resulting in the study and development of new drilling fluids based on eco-friendlier components to replace harmful mineral oils. Organic modified sepiolite dispersed in oil is an excellent additive to provide suitable rheological properties at low concentrations. The present study investigates the effect of alkyl ammonium modifiers on the microstructure and rheological properties of sepiolite-vegetable oil dispersions under high-temperature (up to 140ºC) and high-pressure (up to 2000 bar) conditions. Organo-sepiolite, prepared using a high-shear processing method and containing surfactant with alkyl chains longer than 12 carbon atoms, exhibited a high degree of surface adsorption and thermal resistance. All modifiers developed a stable fibrous structure in the dispersion. This structure maintained the pseudoplastic behavior in a wide range of shear rate, temperature and pressure without reaching an apparent yield stress. These dispersions showed suitable rheological and thermal properties to develop sustainable drilling fluids.
PB Elsevier
SN 1872-9053 (electrónico)
SN 0169-1317
YR 2023
FD 2023
LK https://hdl.handle.net/10272/27668
UL https://hdl.handle.net/10272/27668
LA eng
NO Martín-Alfonso, M. J., Mejía, A., Martínez-Boza, F. J., & Partal, P. (2024). The influence of alkyl ammonium modifiers on the microstructure and high-pressure rheology of sepiolite-vegetable oil dispersions. Applied Clay Science, 247, 107210. https://doi.org/10.1016/j.clay.2023.107210
NO This work was supported by the FEDER grants P18-RT-4684, PID2020-116905RB-I00 and MCIN/AEI/ 10.13039/501100011033
DS Repositorio Institucional de la Universidad de Huelva
RD 14 jul 2026