Ultra-Fast Oleophobic-Hydrophilic Switching Surfaces for Anti-Fogging, Self-Cleaning, and Oil-Water Separation

Smooth copolymer–fluorosurfactant complex film surfaces are found to exhibit fast oleophobic–hydrophilic switching behavior. Equilibration of the high oil contact angle (hexadecane = 80°) and low water contact angle (110°), which, when combined with the inherent ultrafast switching speed, yields oil–water mixture separation efficiencies exceeding 98%

Biodiversity increases and decreases ecosystem stability

International audienc

Adsorption of p-Nitrophenol on Mono-, Di-, And Trialkyl Surfactant-Intercalated Organoclays: A Comparative Study

Organoclays were obtained by the cationic exchange of mono, di and tri alkyl chain surfactants [hexadecyltrimethylammonium bromide (HDTMAB0), dimethyldioctadecylammonium bromide (DDOAB), ethyltrioctadecylammonium bromide (MTOAB)] for sodium ions in an aqueous solution with Na-montmorillonite. The characterization of organoclays with and without adsorbed paranitrophenol was determined by X-ray diffraction, TEM and thermal analysis. Differences in the surfaces and in the interlayer of the mono, di and tri alkyl chain organoclays resulted in differences in the adsorption efficiency for paranitrophenol with tri > di > mono >> Na-Mt