Role of surfactants in spontaneous displacement of high viscosity oil droplets from solid surfaces in aqueous solutions

Li，Rui1; Manica，Rogerio1; Lu，Yi1; Xu，Zhenghe1,2

2020-11-01

10.1016/j.jcis.2020.06.069

JOURNAL OF COLLOID AND INTERFACE SCIENCE   影响因子和分区

0021-9797

1095-7103

Hypothesis: Displacement of oil droplets receding from solid surfaces in aqueous solutions plays a critical role in many household activities and industrial operations. Surfactants are often involved in these activities to control the displacement process. We hypothesize that the influence of surfactants on the displacement process of oil is highly dependent on the type and dosage of surfactants, with the mechanisms being elucidated by the analysis using appropriate dynamic wetting models. Experiments: We systematically investigated the spontaneous displacement of a high viscosity oil on curved hydrophilic glass surfaces in aqueous solutions of anionic sodium dodecylbenzene sulfonate, cationic hexadecyl trimethyl ammonium bromide, and nonionic Triton X-100 over a wide range of concentrations. Findings: The rather different oil displacement behaviors were observed with different surfactant additions. The displacement dynamics of the receding oil droplet was found to be inhibited by surfactant additions and followed two distinct models quantitatively: the power-law model describing the temporal evolution of early-stage displacement, and the molecular kinetic model describing the dependence of the three-phase contact line displacement velocity on the dynamic contact angle at the late stage of oil displacement. The model-based data analysis provided insights on the role of surfactants in controlling the oil displacement dynamics.

Spontaneous droplet receding Surfactant solution Wettability modification Wetting dynamic model

SCI ; EI

英语

通讯

Chemistry

Chemistry, Physical

WOS:000581720500088

ACADEMIC PRESS INC ELSEVIER SCIENCE

20203008970839

Dynamics ; Contact angle ; Drops ; Magnetic bubbles ; Process control ; Surface active agents ; Viscosity

Fluid Flow, General:631.1 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Physical Properties of Gases, Liquids and Solids:931.2

CHEMISTRY

2-s2.0-85088232806

Scopus

1.Department of Chemical and Materials Engineering,University of Alberta,Edmonton,T6G 1H9,Canada
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Li，Rui,Manica，Rogerio,Lu，Yi,et al. Role of surfactants in spontaneous displacement of high viscosity oil droplets from solid surfaces in aqueous solutions[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2020,579:898-908.

Li，Rui,Manica，Rogerio,Lu，Yi,&Xu，Zhenghe.(2020).Role of surfactants in spontaneous displacement of high viscosity oil droplets from solid surfaces in aqueous solutions.JOURNAL OF COLLOID AND INTERFACE SCIENCE,579,898-908.

Li，Rui,et al."Role of surfactants in spontaneous displacement of high viscosity oil droplets from solid surfaces in aqueous solutions".JOURNAL OF COLLOID AND INTERFACE SCIENCE 579(2020):898-908.