Preparation and Performance Study of Fluorinated Janus Amphiphilic Particles
Janus amphiphilic particles not only exhibit excellent interfacial activity but also significantly enhance the stability of interfacial films,possessing the dual characteristics of molecular surfactants and homogeneous particles.Molecular surfactants often struggle to adapt to the harsh reservoir conditions encountered in oilfield development,thereby positioning Janus nanoparticles as a viable alternative.This paper describes the synthesis of fluorinated Janus amphiphilic particles with high thermal and chemical stability using a surface protection modification method,and examines their interfacial activity and transport behavior.At a concentration of 0.6 wt%,the adsorption of Janus amphiphilic particles at the interface reached saturation,lowering the oil-water interfacial tension to 4.2×10-2 mN/m,indicating their strong interfacial activity.Furthermore,the interfacial activity of Janus nanoparticles was not significantly affected by variations in temperature and NaCl concentration.Janus particles exhibited excellent anti-adsorption properties,achieving a cumulative recovery rate of over 95%.The reversible adsorption of Janus amphiphilic particles slowed their migration speed but did not prevent their movement in porous media.
万方数据
维普
