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Amphiphobic Carbon Nanotubes as Macroemulsion Surfactants



Haonan Wang, Erik K. Hobbie


Single-walled carbon nanotubes (SWNTs) are insoluble in either water or oil. When mixtures of SWNTs, water, and toluene are sheared rigorously, a macroscopic emulsion ofwater droplets form in toluene with SWNTs residing at interfaces between water and toluene, acting as a natural surfactant or interphase material. The average droplet dimension decreases as SWNT/water mass ratio increases, implying a coarsening-pinning mechanism. The concept of emulsification via amphiphobicity will find applications in processing nanotubes, compatibiliizing immiscible fluids, and creating new macroscopic emulsion materials with unique interfacial and structural properties.
19 No. 8


amphiphobic, carbon nanotubes, emulsion


Wang, H. and Hobbie, E. (2003), Amphiphobic Carbon Nanotubes as Macroemulsion Surfactants, Langmuir, [online], (Accessed April 13, 2024)
Created March 31, 2003, Updated October 12, 2021